The aluminium foil strip must face upward on the lower half of the slatex.The slatex 2000 is then nailed, with large headed copper clout nails, through the unprotected felt, onto a batten. It remains in good condition and was still on the home in 2018. By the 1920's this slate was probably means more deteriorated. The slates in our photo (left) may look questionable from the ground but a closeup inspection may show, as this one did, that the slate body is still thick and hard, and it is surface delamination of the slate that was visible from the ground. Typically artificial slate roof life expectancy varies between 20 - 60 years. Softer slates, especially those once quarried in parts of Pennsylvania, have a life span of 75 to 90 years. 143 Forest Lane, PO Box 607, Grove City, PA 16127 - 866-641-7141 (We recommend this book). Here, learn which roofing lasts the longest. Vermont slate roofs, with proper maintenance, can last indefinitely. Site conditions, such as the roof pitch, exposure to A well installed slate roof will last a century or more. Vermont slates as having a 175 year life. Asphalt roll roofing is made from large rolls of the same material used in asphalt … Unlike tiled roof systems like stone slate, clay tiles, concrete tiles, etc. from one building to the next. British geologist J.A. Monotonically means that the color change is even across the material Continue reading at SLATE ROOF PATTERNS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX. Steven Trapasso, personal communication. Overall, homes with slate roofing … It’s also no surprise that slate roofing has been one of the oldest and most time-tested forms of roofing worldwide for centuries. For slates higher in carbon Young, Wiley (March 21, 2008) Contact information for these companies and slates can be found at SLATE ROOF SOURCES & TOOLS. With experience from 1954 we strive to give the best service and workmanship in the roofing industry possible. ISBN-13: 978-0471788362, Historic Slate Roofs : With How-to Info and Specifications, Tina Skinner (Ed), Schiffer Publishing, 2008, ISBN-10: 0764330012 - lime deposited on the slate surface. Some of the oldest homes in the nation sport slate tiles on their roofs. The known chronological age of slates may be available from an owner Roof Tiling & Slating, a Practical Guide, Kevin Taylor, Crowood Press (2008), ISBN 978-1847970237. at Vermont Structural Slate Co. We also paraphrased from a presentation The white areas generally begin at the three exposed sides of a slate, in this article is taken from the references shown below, from inspection You will have an additional layer of protection against decay, wear, and leaks. ISBN-10: 0471788368 The lime which was in the slate, when the slate was mined, Fading versus mottling: It is important for an inspector to distinguish between the mottled Because steel nails are used in South Africa, adjacent slates get damaged and displaced in the ripping process, and these, too, will have to be replaced. Those which have only minimal color change The damaged slate is then removed by pulling out the nails with a ripper. Slate from different mines has different average slate roof life expectancies (with proper installation and regular maintenance): Vermont and New York slates: 125 to 175 years. Griffin, Mcgraw-Hill (Tx); 2nd edition (July 1982), ISBN-10: 0070247838, ISBN-13: 978-0070247833. According to the National Slate Association, (quoting). These components cause the lime to break down the organic By Mr. Trapasso's account the decomposition Fire Resistant: Slate roofs are one of the most fire-resistant roofing materials on the market. AD That’s the type on top of my 1946 house, so I am in the market for a new slate roof. age. , 1981. The Welsh slates may then be re-used. Longest lasting roofing material. Watson's opinion that slates are more durable than clay tiles is arguable as both materials are found with considerable variation in composition. It was reserved for high end buildings usually in big cities in the 1600 and 1700s, but once slate became available locally the costs came down and it began showing up in more places. Handbook of Building Crafts in Conservation, Jack Bower, Ed., Slate Roof Lifespan Natural slate roofs are well known to have a lifespan of hundreds of years with little to no maintenance. These slates might, from a distance, look pretty good, but The New Practical Builder and Workman's Companion Notice that in addition to worn out, missing, and thin delaminateing slates, the white effloresence markings are extensive on some of these roof slates. did Mr. Trapasso, but on seeing how soft and delaminated this slate can become, we can understand his loose use of that term. impurities and were recommended by the Slate Association only for iron content in the slate which is following a similar reactive path. National Slate Association, p. 71. opinions in Handbook of Building Crafts in Conservation By eliminating the need for costly structural engineering, the weight savings on a SlateTec Lightweight Slate Roof transfers into money saved for you without compromising the quality or aesthetics of the roof. 81-50643. If the whole slate is white By other sources, Vermont slates have life expectancy of 100-200 years. The correct replacement slate is then slid into place and secured with a steel hook or clip (conventional roof system). More white, more efflorescence Slate's unparalleled lifespan as a roofing material is an attractive benefit, of course, but claims that it increases home value or that, as an investment, it yields you a measurable return over the life of the roof are frequently overstated. Their unfading black slate is currently produced for the European and North American market and is marketed in North America as North Country Unfading Black. Watson continued to suggest that slates, being less porous than clay roofing tiles of the day, were more durable. Having your roof waterproofed reduces the risk of damage. on slate roofs. The first production from this vein of slate occurred in the early 1900s. exposure. Slate Roofing in Canada (Studi4es in archaeology, architecture, and history), Arlene Puentes [Website: www.octoberhome.com ] , an ASHI member and a licensed home inspector in Kingston, NY, and has served on ASHI national committees as well as HVASHI Chapter President. How to inspect, identify defects, and estimate remaining life of slate roofs are addressed. The cheaper options will last at the lower end, so it's worth investing to make sure your roof lasts a long time. Apologies for the delay. Clearly there is more material available to form The Slate Roof Bible, Joseph Jenkins, www.jenkinsslate.com, And, our impressive warranties give you additional peace of mind that your most treasured asset is protected for a lifetime. We were warned by an experienced slate roofer and we have confirmed by field inspections of slate roofs that determination Slates with these ribbons have the shortest service life - about 75 to 90 years. Slate. from a few inches, either from a ladder or some other point of view such as an attic window. hi, what is the difference between canadian roofing slates and welsh slates . Given the life span of slate roofing compared to other residential roofing systems, you corrosion is the last thing you want to happen with the flashing. we did not find references to brown in Virginia slates. As you can read in more detail at RIBBON SLATE, there are two different sorts of ribbon slates, definitely from different quarries. The purple slate is very similar in color to Welsh Purple from England. We'd presume that observation pertains to the early or and source of slates would not want to condemn, except in the worst A slate rating or grade can tell you a lot about what kind of lifespan you can expect from the stone over time. we observe that while oxides of silica (SIO2) on a building in 1991. Slate Roof Central - How To Identify Roof Slate. Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism.It is the finest grained foliated metamorphic rock. of its life. of wood. This would seem to argue against the "slate rots" Some waterproof solutions last up to 20 years, vastly extending your roof’s lifespan. Examining quantitative analysis of slates from nineteen quarries and aluminum oxide (AL2O3) are the Click here to tell us about your project. ISBN-10: 1405161035 This article describes various indicators of wear and aging found on slate roofs as an aid to assessing the overall roof condition, its risk of extensive leak points, and its probable remaining life. Energy Efficient. Reduces humidity levels; Slate Roof Waterproofing seals and protects the infrastructure from water leakage. Carbon, which Some ribbon slates whose ribbons or lines of color through the slate demonstrate color lines comprised of soft minerals, sometimes even with small voids, often of a red or rust-brown color. Van Nostrand Reinhold Company, NY 1981 ISBN 0-442-2135-3 Library of of Pennsylvania slate may be understood as a process similar to decomposition The added bonus that slate provides is a longevity that most other roof materials cannot compete with. That’s not to say there isn’t inferior slate being used on roofs. John Cranor [Website: /www.house-whisperer.com ] is an ASHI member and a home inspector (The House Whisperer) is located in Glen Allen, VA 23060. edges-in whitening (efflorescence) and fading. Toll Free: 855-752-8383 Risks include falling - very slippery, and extensive Long lifespan of 100 years or more – With proper care, it’s not unheard of for a slate roof to last at least 100 years, and some roofs can last 150 years with proper installation. claimed some chemical or molecular process of permanent or continuing Here are some close looks at roofing slate to reveal conditions you cannot detect from a ground-level inspection, even using binoculars. A Look at Slate Tile Roof Life Expectancy. This blend of quality and aesthetics, as well as the large format sizes available, makes Welsh Slate roofing slate much desired for heritage and prestigious projects including Buckingham Palace, Number 10 Downing Street and St Pancras and King’s Cross Stations. useful life may have been damaged by frost. damage to the slates. From replacement roofs to new construction, our patented roofing system eliminates roughly 40% of materials needed in a traditional installation. Watson's comments pertain to use of slate in Britain. As with all materials, experienced inspectors sun, building moisture and ventilation and exposure to mechanical Even with all the modern roofing materials out there, slate has retained its position near the head of the pack. It is worth distinguishing between mechanical damage (repairable) and wear factors that mean the slate roof is at the end of its life or perhaps beyond economical repair. Virginia slates: 175 years or more. SLATE ROOFS - CHEAPEST OF ALL. Additionally, you should learn about the right measures to take if issues arise with slate shingles during the time you own a property. initial state of use of the slates, and we found no reference which It is useful to contrast the above "soft crumbling roofing slate" with the surface delamination of the roofing slates shown at left. While roof covering are generically referred to as tiles (which are moulded), flat slates are often referred to as a ‘roofing tile’ by home owner. the same, is esteemed the best, which imbibes the least water; for the imbibed water not only increases the weight of the covering, but, Earlier British experimentation on slate durability and composition emphasized that variations in the tendency of slates to absorb water Information This red slate, probably from the Granville NY quarry, was also wet through to the touch. surface the slate material is exposed to ultraviolet rays (sunlight) of the slate. However as long as the slates are physically intact the Slates may look fine from the ground, but be found soft We've heard several explanations for the mechanism by which Pennsylvania A slate roof is a popular roofing choice for many self-builders and renovators because of its impressive service life, excellent durability and timeless appeal. Or use the SEARCH BOX found below to Ask a Question or Search InspectApedia. With proper maintenance such an asset may be continued Rubber shingles or Rubber slate is … Some benefits of slate roofing compared to new asphalt roofing installation: Life Expectancy up to 150+ years. Often you’ll find simulated slate tiles used to repair damaged slate tiles. Starting at the lowest point of the slope, roll slatex 2000 out across the roof parallel to the eaves. We also provide a MASTER INDEX to this topic, or you can try the page top or bottom SEARCH BOX as a quick way to find information you need. Click to Show or Hide Citations & References, Durability of slate roofs - how to inspect slate roof condition, MANUFACTURED / SYNTHETIC SLATE ASBESTOS CONTENT, SLATE THERMAL MASS for SOLAR HEAT STORAGE, HOME INSPECTION EDUCATION COURESES (Canada), HOME INSPECTION EDUCATION: HOME STUDY COURSES. across the slate rather than from edges in. This is a generalization, as some of these slates fail sooner, some last longer. of circumstances, a Vermont slate roof. Welsh roofing slate is described by welshslate.com which I quote as well, noting that this is also marketing literature mixed with useful facts: Natural slate from Welsh Slate’s Penrhyn, Ffestiniog and Cwt-y-Bugail quarries produces the finest roofing slates in the world. dissolved and deposited on the surface of the slate when moisture Its durability, which sets it apart from other slates, is derived from its density and the geological formation found in that part of North Wales. Archeological excavations at Jamestown, Virginia,have unearthed roofing slate in strata dating from 1625-1650 and 1640-1670. Ms. Puentes can be contacted at, Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the. Natural Stone is the ultimate eco-friendly, durable, and beautiful roofing material. The reason for such a wide pricing range is that installation/labor costs can vary widely from installer to installer. Worn slates at end of life, lost slates, delaminated slates, broken slates on this small roof make re-roofing necessary Worn out slates and sliding slates, on a slate roof beyond economical repair. Slate is a heavy product to ship, which may explain why in my opinion slate mined in North Wales in the U.K. is not likely to be found on many buildings in the U.S. or Canada. There are slate roofs today, still functioning, that are multiple centuries old. On the other hand, even with proper maintenance, wood-shake, asphalt shingle, and concrete tile roofs are known to last only 20 […] rate the apparent wear age of the roof, not the actual An independent UK study of different roofing materials revealed that if the cost of a roof is amortised over its expected life, slate roofs (with a capacity to last 100 years) were the cheapest of all. rather than showing up as a splotch, or a ring of white around darker and causing the white efflorescence. For Edco roofing slates sold in Canada the product includes a 50 year warranty. of slate roofs, and from very helpful Bill Markcrow and Doug Sheldon Pennsylvania "Black Bed" quarried slates were high in carbonaceous - welshslate.com. Installed correctly, a new roof will last at least 15 years, but the exact lifespan depends on the material. Mr. Trapasso has 40 years experience in working with slate, and has InspectAPedia tolerates no conflicts of interest. calcium oxide (CaO) and other carbonates and oxides. The NAHB (National Association of Home Builders) rates slate as by far the longest lasting roofing material, with a life expectancy of 150+ years, followed closely by clay and concrete at roughly 100 years. As a result, geologist emphasizes natural slate durability to last over a century. inspection reports. We strongly advise inspectors not to walk 4) Pennsylvania black slate (below) from the Lehigh Northampton slate district tends to be the "soft" slate with a life expectancy of 75-125 years. A slate tile roof adds instant curb appeal because it is beautiful and can only complement the architectural appeal of your home. dominant components of slates, almost all have measurable levels of Welsh Slate roofing is commonly removed from roofs after 100 years not because they have failed but because the roof timbers holding them up have failed. are classed as "permanent" or "unfading". ©2020 Genuine Roof Systems. that lime in the slates in the presence of moisture reacts to break A slate that’s graded S2 or S3, is far less suited as a long-term roofing solution compared to S1, and is often sold at a far cheaper price. Although slate quarrying was not common in the United States until the latter half of the nineteenth century, slate roofing is known to have been used prior to the Revolution. The white visible in Pennsylvania slate is evidence of efflorescence Indeed unglazed clay absorbs more water (up to 10%) than slate (usually 1%) but tiles are not necessarily damaged by these freeze-thaw conditions. Asphalt Roll Roof. Life expectancy of Vermont roofing slate. The Old House Journal, April 1983, p.58, and Slate Roofs, National Slate Association, p. 71. By contrast to the Don’t settle for anything but the best when it comes to your home. This is not as good as some materials like real slate, but it is better than typical shingles which are about 20-30 years. recognized as not as durable; you'd not expect to find it surviving Try the search box just below, or if you prefer, post a question or comment in the Comments box below and we will respond promptly. Genuine Roof Systems offer natural sophistication. Our photo at left shows a slate roof in good condition at Vassar College in Poughkeepsie, NY. end of its life risks an angry inspection client. a clear love affair with the material, particularly when it comes or other documentation. , All slates will Deteriorating Pennsylvania slate shows a mottled appearance, with calcium carbonates and efflorescence in the shorter lived materials. We do not agree that we should call this "rotted roofing slate" as Natural slate is the most durable roofing material. The tiles themselves are completely fireproof, being made of stone. The article series also references slate repair procedures, repair slate sources, and slate quarries. S1 slate is totally impermeable to moisture penetration of any kind. Even today, slate remains the premier choice for those who want the best. and exposed. Contact Mr. Cranor at 804-873-8534 or by Email: Building Pathology, Deterioration, Diagnostics, and Intervention, Samuel Y. Harris, P.E., AIA, Esq., ISBN 0-471-33172-4, John Wiley & Sons, 2001 [General building science-DF] ISBN-10: 0471331724 The reason high-grade S1 roofing slate lasts so long is simple, it’s a naturally non-porous material, that perfectly splits into tile-sized pieces. On top of that, we use only the highest quality Vermont S1 Grade Slate, which is what some companies try to mimic with their synthetic plastic imitation slate. in slates from only a few quarries, and then in usually small amounts This simple combination of our interlayment system and genuine materials makes for a roof that is easy to install, lighter weight, and cost-effective. Walsh highlights that natural slates have a service life of greater than 100 years. color, or in other variations. By direct inspection we mean looking at slates Metal roofing made from steel or aluminum is durable and can handle 40-80 years of wear and tear before they need to be replaced. This means that nothing will compromise slates structural integrity over time. 3. One of the factors that deters many homeowners from installing a slate roof is the high cost of materials and labor. Email: mike@genuineroofsystems.com same time, careless optimism about a bad slate roof which is at the would be broken down in the process described by Trapasso, occurs of these materials in Pennsylvania slates (3%) than in slates from On a different home in the same city, the mansard style slate roof shown below right employs a mix of ribbon slates, some of which were quite worn and appeared to be at the end of their life. Slate Roofing Requires Different Fasteners — Slate nails are entirely different from the fasteners used on asphalt shingles and metal roofs. As well as being an impermeable moisture barrier, natural S1 grade roofing slate is also highly resistant to UV light, wind, rain, hail, snow and more. It's a nice word, not recommended for These determine the density and composition The Old House Journal, April 1983, p.58, and Slate Roofs, Penrhyn slate, for example, was removed from St Asaph Cathedral after 400 years in use and reused and this practice also applies to civic buildings as far away as Australia. Vermont (.3%-.7%). Natural slate roofs are well known to have a lifespan of hundreds of years with little to no maintenance. In contrast, most asphalt shingle roofs must be replaced every 15-30 years. slates will not show an obvious whitish powder of surface deposited 6.Life Expectancy: Rubber shingles have a pretty good lifespan of about 50 years. Those which change more and moisture. evaporates. of slate condition other than by direct up-close inspection is highly unreliable. This article series reviews Also the Old House Journal April 1983 rates references indicate that slates actually harden after being quarried All rights reserved. Or see SLATE ROOF DEFECTS where we describe a variety of problems and leak points on slate roofs that are not necessarily a function of the age or wear condition of the roof. The life expectancy of a slate roof is estimated to be anywhere from 75 years to 150+ years. There are slate roofs today, still functioning, that are multiple centuries old. For starters, you need to consider slate roof life expectancy in relation to the age of the house. For fibre cement roof slates, the life expectancy is a little shorter at around 50-60 years. roof on the Saxon Chapel at Stratford-on-Avon was built 1100 years When the slate is split, cut, punched for use, the lime S2 and S3 rated slate in not 100% non-porous. explanation of deterioration. Peter Nicholson, 1823, reissued 1861, republished with companion modern ISBN-13: 978-1405161039, Built-Up Roof Systems, Manual, C.W. This smooth-textured slate is easy to cut and has a consistent black color with subtle vertical shade markings. However, there’s more than just aesthetics to think about when it comes to installing a slate roof. By other sources, Vermont slates have life expectancy of 100-200 years. It does point out that the slate Production of roofing slate from this quarry has been intermittent since the early 1900s. Slates which are soft, delaminating, and thus are at or near end of their The slate roof in our photo at left was coated over all of its surface with roofing tar that later began to wash away. Among the most common slate roof repairs, two are the most common according to professionals: This elegant stone roofing is known as one of the longest lasting shingles still on the market today, prized for its beauty, durability, and longevity. markedly are classed as "weathering". But while the upfront cost of installation is high, the cost per year over its lifespan is the lowest of all of its competitors. damage also affect slate life. Roofing Slate Life Depends on From Where Slates were Quarried, as we desribe below. Metal roofing. Increases the value of your home. No roofing contractor? Longevity: Slate roof tiles have a life-span between 100-200 years. We give attention to detail, delivering all our products according to the needs of our clients. A lifespan of 80-100 years is typical for slate roofing, although this can last longer if maintained well after installation. No. high-quality material which, properly maintained, can have a near indefinite life. Slate roofing was once the material of choice for high-value roofs. Signs of slate roof wear & deterioration from close-up inspection allows one to assess remaining roof life: the abandonment of good slate roofs which should have been repaired A few of these slates were on the ground along a barn on the FDR estate, the rest were still on the roof. experience, from opinions shared at ASHI and other education seminars, In my second "rotted slate" photo below, I'm demonstrating that my weak puny thumb and forefinger are engough to smush this red slate into mud. The rate of slate deterioration on roofs depends on the source quarry and the depth John you must know that the names refer to where the roofing slates originate. Vermont slate roofs, with proper maintenance, can last indefinitely. , ISBN-13: 978-0764330018, Problems in Roofing Design, B. Harrison McCampbell, Butterworth Heineman, 1991 ISBN 0-7506-9162-X (available used), Roofing The Right Way, Steven Bolt, McGraw-Hill Professional; 3rd Ed (1996), ISBN-10: 0070066507, ISBN-13: 978-0070066502. The slate above looks pretty good from a distance, though in the first photo as I've begun to push it up you can see some delamination. It is interesting to note that several tips. My third end-of-life slate photo shows the result: the slate is a handful of fragile chips and slivers. Stone, being inorganic, does not truly "rot". Note: appearance of your Comment below may be delayed: if your comment contains an image, web link, or text that looks to the software as if it might be a web link, your posting will appear after it has been approved by a moderator. from Vermont. from the authors' personal, limited experience repairing and rebuilding If a roofer recommends tearing off the whole Finally, when comparing slate properties it is worth remembering the location of the slate quarry and considering the shipping costs of alternative slates. But a closer inspection will be needed to form an accurate assessment of the leak problem that led folks to tar the entire roof. S1 rated roofing slate is warrantied to last 100 years but it’s expected to last even longer. in color and scaling you should consider the slate to be at the end This series of detailed slate roof inspection and repair articles describes procedures for evaluating the condition of slate roofing. The first is or really past end of roof life and the second slate roof has good life remaining. to NY Metro ASHI Members by Mr. Steven Trapasso in October, 1990. A poorly installed one is a lot like having no roof at all.” Slate roofing tiles are lot heavier than other roofing materials. Click here to tell us about your project. in frosty weather, being converted into ice, it swells and shivers the slate.". Average life of these slates is 175 years. is a financial shame and the destruction of a valued asset. Problems with slate roofs is that tiles may be difficult to match in color and thickness. As long as the slate installation is performed by a reputable roofing contractor with experience. Typical life for Pennsylvania slate roofs is 40-50 years. may be the principal cause of deterioration seen by modern inspectors. Posted on September 4, 2020 October 6, 2020 by Brava Roof Tile. SIGA 24 Slate Roof. Foliation may not correspond to the original sedimentary layering, but instead is in planes perpendicular to the direction of metamorphic compression. The National Slate Association reference does not detail fade from weather exposure. He is also a contributor to InspectApedia.com in several technical areas such as plumbing and appliances (dryer vents). Prior to the opening of the first commercial slate quarry in America in 1785 in Pennsylvania all slate was imported from North Wales in the UK. down organic components in the slate. After a detailed research, Walsh exposed natural slate (including CUPA 3) to different weather conditions. Our design team can accommodate any custom or standard roofing project and help you choose from the many slate colors and textures to build the perfect roof for your home. Overlooking the ocean at Burgoynes Cove, Newfoundland, is a deposit of smooth to medium-texture, unfading Cambrian slate with deep purple, green and variegated green and purple slate colors. Such roofs should be maintained, not replaced. The delicate nature of slate tiles and the relative age of most roofs, particularly in the northeast area of the United States where they often date back to the 19th century, means that there’s a variety of problems that modern homeowners are likely to encounter. - slateassociation.org. We will work with you to find a reputable contractor in your area. temporary buildings or for chalkboards. Low Maintenance. sunlight. or carbonaceous materials this may be indeed the most accurate explanation. roof is serviceable. we were easily able to crush the slates with my fingers. expectancies are general experience with the material and do not consider installation or environmental factors which vary and at end of life on close inspection. is in an inactive or dormant state. There are dramatically higher levels It is impossible to list a general cost of a newly installed slate roof as there are too many variables. Inspectors who do not know the composition for an indefinite period. mineral salts as thick as that left by efflorescence. We’re proud to offer you a free consultation. types of slate, common defects, inspection topics, and some repair We do not know the origin of this particular slate, but it's wear condition and age indicate a durable roof. As the railroads spread so did the proliferation of slate roofs and by the 1870s the US had become a ne… The life expectancy of natural slate varies enormously from 70-100 years, depending on the quality of the slate. To argue against the `` slate rots '' explanation of deterioration with.... Slates are made from slate quarried in parts of Pennsylvania, have a lifespan of 80-100 years is for! Stone is the difference between canadian roofing slates and welsh slates in not 100 % non-porous 1982,. Can last indefinitely 's comments pertain to use of slate deterioration on roofs, geologist emphasizes natural slate varies from... Longevity: slate roof will last a long time and considering the shipping costs of alternative slates can... Roofing has been one of the most accurate explanation is important for an inspector to distinguish between the edges-in! With experience from 1954 we strive to give the best poorly installed one is a generalization, as some like., ISBN-13: 978-0070247833 from this quarry has been intermittent since the early 1900s newly installed slate tiles. Shows a slate roof Waterproofing seals and protects the infrastructure from water leakage not recommended for reports... Holding our slate in place about when it comes to installing a slate roof life and the second roof. Your area slate durability to last 100 years but it’s expected to last a. Tell you a lot like having no roof at all. ” slate roofing tiles are lot heavier other... Used to repair damaged slate tiles deposited mineral salts are dissolved and deposited on market. S1 slate is … Typically artificial slate roof lifespan natural slate roofs, slate... % non-porous a ripper a life-span between 100-200 years are found with considerable variation in composition roofing tile anywhere! 855-752-8383 Email: mike @ genuineroofsystems.com ©2020 Genuine roof systems shows the result: the slate impressive! Repaired when needed the market for a new slate roof as that left by efflorescence slate tile roof adds curb! Professionals: slate roofs is 40-50 years hooks holding our slate in Britain ) different... In an inactive or dormant state life and the second slate roof in good condition was! Photo in the early 1900s toll Free: 855-752-8383 Email: mike @ genuineroofsystems.com Genuine... Roofing tiles of the slate roof in our experience, in the is. If maintained well after installation among the most common according to the direction of metamorphic compression Depends from. A distance, look pretty good lifespan of hundreds of years with little to no maintenance salts dissolved. To consider slate roof in our photo at left shows a mottled appearance with! — slate nails are entirely different from the Granville NY quarry, was also through... Additional peace of mind that your most treasured asset is protected for a lifetime metal roofs our patented system! Stone over time ago - still in good condition inspection will be needed form... To crush the slates were cut efflorescence probably means more deteriorated have the shortest life... From oxidizing iron content in the early 1900s Mr. Trapasso 's account the decomposition of Pennsylvania, have a of... Wear age of slates may be available from an owner or other documentation slate rather from. Last indefinitely we strive to give the best physical characteristics of the and! Of roofing slate quarry and considering the shipping costs of alternative slates 2000 out across the roof, recommended! Homeowners from installing a slate roof PATTERNS or select a topic from the closely-related articles below, services! Detail at RIBBON slate, common defects, and thus are at or near end of its with! Slate ( including CUPA 3 ) to different weather conditions out there, slate remains premier... '' or `` unfading '' is very similar in color and scaling you should to. Slates as having a 175 year life additional layer slate roof lifespan protection against,. Factors that deters many homeowners from installing a slate roof tiles have a pretty good lifespan of years.: 0070247838, ISBN-13: 978-0070247833 have the shortest service life - about 75 90... Choice for high-value roofs last longer for such a wide pricing range is that may... The shortest service life of slate deterioration on roofs Depends on from where slates were on the surface the. A durable roof years of wear and tear before they need to consider slate is! Slates fail sooner, some last longer, ” says HomeAdvisor ll find simulated slate tiles used repair!: 978-0070247833 roofing material at the end of life on close inspection between 363 680kg. A lot about what kind of lifespan you can read in more at. Wear, and thus are at or near end of their useful life have..., as some materials like real slate, clay tiles, etc were easily able to crush slates... Like having no roof at all. ” slate roofing was once the material of choice for those want... Your roof waterproofed reduces the risk of damage delamination of the slope, roll 2000... 'S opinion that slates, definitely from different quarries is then slid into place and secured with a ripper slate! Pulling out the nails with a steel hook or clip ( conventional roof system ) also surprise. The pack buy slate roofing compared to new asphalt roofing installation: life expectancy natural! Of 100-200 years repair damaged slate is then removed by pulling out the nails with a steel hook clip! More material available to form an accurate assessment of the day, more... Still in good condition this red slate, but instead is in an inactive or state. Surface of the slate quarry and considering the shipping costs of alternative.. New asphalt roofing installation: life expectancy of 100-200 years 2nd edition July. By a variety of companies repair slate sources, Vermont slates as having a year. That tiles may be understood as a result, geologist emphasizes natural slate varies from! Good condition at Vassar College in Poughkeepsie, new York was about eighty years Old when took! Slate roof may not correspond to the age of the oldest homes in the market for a.! Longer if maintained well after installation stone is the slate roof lifespan cost of slate! Naturally non-porous material, that are multiple centuries Old estimated to be the... Entire roof how to Identify roof slate rest were still on the Saxon Chapel at Stratford-on-Avon was built years... With all the modern roofing materials and slate roofs, National slate Association, 71! Emphasizes natural slate varies enormously from 70-100 years, depending on the market ” says HomeAdvisor 1654 Philadelphia! Are at or near end of life on close inspection is … Typically artificial slate roof repairs, two the... White visible in Pennsylvania slate is white in color and scaling you should ask to shown... Known to have a pretty good, but be found at slate roof PATTERNS or select a topic the... Then slid into place and secured with a steel hook or clip ( roof., delaminating, and extensive damage to the efflorescence process, fading slates generally fade monotonically across slate... Will compromise slates structural integrity over time possibly other ] slates often indicates the extent of deterioration white! Expectancy: Rubber shingles or Rubber slate is then removed by pulling out nails... Totally impermeable to moisture penetration of any kind this vein of slate occurred in slate. Are some close looks at roofing slate lasts so long is simple, it’s a naturally non-porous material, it. From an owner or other documentation are slate roofs are well known to have a lifespan of hundreds of with. Roll slatex 2000 out across the roof detailed slate roof tiles have a span. Efflorescence probably means more deteriorated: life expectancy of 100-200 years slates generally fade monotonically across the roof not! At all. ” slate roofing years to 150+ years Chapel at Stratford-on-Avon was built years!: 0070247838, ISBN-13: 978-0070247833 some materials like real slate, there no... You a lot about what kind of lifespan you can read in detail... Of about 50 years the Fasteners used on roofs Depends on the FDR estate, the rest were on. Of 75 to 90 years slates may be available from an owner or other documentation and... Roof in our experience, in the 1980s steel or aluminum is durable and can handle years! In composition to professionals: slate roofs, with white faded patches resulting exposure. Parts of Pennsylvania, have unearthed roofing slate lasts so long is simple, a. And some repair tips slate installation is performed by a variety of slate roof lifespan removed! Work with you to find a reputable roofing contractor with experience from 1954 we strive to give best. They need to be shown examples of failed slates roofing was once material! Desribe below for high-value roofs do not know the origin of this particular slate, but instead is in perpendicular! Roofing TOOLS and products slates structural integrity over time in contrast, asphalt... House, so it 's worth investing to make sure your roof lasts a long time, slate has its... Made of stone harden after being quarried and exposed slates often indicates the extent of deterioration inspectors... The first production from this vein of slate deterioration on roofs Depends on from where slates were found often. Dating from 1625-1650 and 1640-1670 of their useful life may have been damaged frost! Inspectors rate the apparent wear age of the leak problem that led folks to the... Clearly there is more material available to form an accurate assessment of slate! Was also wet through to the direction of metamorphic compression to tar the entire roof with a hook. Were introduced in Boston as early as 1654 and Philadelphia in 1699 we will work with you to a. Century or more too many variables visible in Pennsylvania slate is very similar in color to welsh from...
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