I haven't done EPDM but have worked on jobs where it was used and to me it appears to be a system that can only work together with itself. as a matter of fact, the red brick showing through suggests that maybe it was put on with cold process or hot mopped instead of using fibred cement. : (781) 396-0070 - Fax: (781) 396-8890. Forget the trowel, it uses three times as much material and takes too long to do it. It is important to install flashing at the parapet in two key locations: 1) under the coping stone, and 2) at the roof line. Turned out to be an expensive fix, but solved our wall leak problems,and avoided the asbestos removal cost. The flashing for your plumbing vent needs to be large enough to surround the vent, so it should be just wider than the vents diameter. You wouldn't need a base flashing as long as the existing roof and cant are sound. Continuous wood blocking is securely anchored to the top of the stone coping, along both edges, and covered with building paper. cold rolled copper, is nailed to the blocking on the outside face. We use torch applied membraneson a regular basis (we've installed anywhere from 1,000 sq.ft. Try epdm rubber roof. The modal window is a 'site map' of the most critical areas of the site. Many buildings have flat roofs in certain areas specifically for air condoning
The lower edges of the copper coping are hooked over an edge strip and are free to move. The upper edge of the copper flashing is locked into a continuous copper lock strip. It is a lot slower to apply, but on an occuppied office building we couldn't risk a hot mop. I have been in construction for over 25 years, including post secondary school. If nailed to both, the flashing may deform under the pressure from shifting brick or wood. However, due to manufacturing variances, the limitations of your monitor resolution and the variation in natural exterior lighting, actual colors may vary from the images you see. Ever hear of a product from Sandell "Copper flashing fabric"? The combined base and coping flashing must be installed to provide positive drainage away from the new wall. I was under the impression thatthis was an open forum for discussion, EPDM is not an option as far as I had read so I issued my post. A reglet is used to hold the continuous cleat in place, thus eliminating the need for wood blocking. It seemed a little odd and gave me a chuckle that I was trying to share back with you. Yeah, I know that, but who is this "We" Kimosabe`;). hook strip,
Riverside Sheet Metal is a member of the North East Roofing Contractors Association & the National Roofing Contractors Association. Lots of options - don't know what would work best. I would not be surprised if the original job was done by skipping the overcoat of roof cement and gioing directly to the silver coat, which would be why it is in such a state of failure. You would only need the counterflashing dropping down over the cant. BTW, Tremco makes a cold mop BUR that is holding up guite well after 10 years. For example, head flashing or cap flashing protects doors and windows from water. thus the Tonto/Lone Ranger joke reference. While some professional roofers will make their kickout flashing by hand in copper, if youre using galvanized steel, it will be too tough to bend properly. Many buildings have flat roofs in certain areas specifically for air condoning
Special pricing available for large quantities. What is roof flashing? If it doesnt have a corner, and simply looks like the image below, follow the second installation procedure. How to Install a Pellet Stove Pipe Through a Wall, Certainteed: Flintlastic Application Handbook. Those 8 inches are more than enough to cover the exposure of typical shingles. The roof does have some slope, the downhill end has no parapet, and there are a couple of scuppers involved. Shown is a condition where a new wall is constructed adjacent to an existing lower wall. Rose. Flashing materials include sheet metal (copper, galvanized steel, stainless steel, aluminum, lead), EPDM (ethylene propylene diene monomer rubber), plastics and asphalt impregnated membranes. Self-adhesive membranes are popular with many masonry designers and provide adequate durability for many applications. I would definitely NOT mess with the roof - get a roofing contractor with a kettle and some know-0how to deal with that if it needs help, but what ain't broke - don't try to fix it. Solder the overlapping end of a piece to the piece below with the appropriate solder for sheet metal or copper. Second, step flashing needs to extend 8 to 14 inches above the shingles, according to the National Roofing Contractors Association (NRCA). If the original flashing is in good condition and can be removed without damaging it, it is possible to reuse it. no question. Tel. Please give me brand names of products, so I can ask for them and if they're not available, at least the sales rep will know where to start. This provides a suitable means by which to anchor (grout solid or wedge and seal) the continuous copper cleat. I am not a carpenter. Momma wants the boy out of the house and down the road, but daddy just keeps giving him money. Excellence is its own reward! My background is BUR and yours is metal, so that is why we have differing approaches - neither one wrong. First, step flashing must be installed before the siding, so that the siding can cover the top of the flashing. And it is brittle. The third is an expansion joint composed of a flat lock seam filled with sealant. Whenever you are asked if you can do a job, tell'em "Certainly, I can!" Water should run down the side of the flashing and be directed to the shingles instead of finding its way into the roof deck. When nailed only to the roof plane or vertical wall, the flashing can stay in place while the other building materials expand and contract throughout the seasons. This cover, in turn, laps over base flashing which is cleated to the roof deck or a nailing strip. You should not take risks with your roof. These are the key types of roof flashing you need to understand: Continuous copper flashing on a shingle roof. The roof itself does not have any blisters or alligatoring, so I really don't want to disturb it any more than necessary. T. Roosevelt, It would just lapp down over the cant strip by five or six inches to where the gravel sets, the nice wartm squishy feeling is nice once you get used to it. 1481 Merchant Drive Algonquin, IL 60102 TF: 800-536-2225 P: 224-678-9709 F: 224-678-9714, Crown Masonry & Construction Materials, LLC. While roofing professionals occasionally use nails when flashing, they must choose whether to nail to the roof plane or the vertical wall. On the opposite side, a continuous copper edge strip is attached to the coping, and the lower edge is bent to form a drip. Yep, this part was built about 40 yrs ago that's when you finished your apprenticeship, right? Is there such a thing as a ten dollar horse, LOL. Installation of flashing at the roof line can prevent warm moist air from the lower wall filling the parapet cavity. The lower edge of the parapet cover is joined to the upper edge of the copper roof with a transverse seam. Copper, stainless steel, and lead flashing are used in buildings where the designed service life is measured in hundreds of years. copper: first, find 8" in the column "width of gutter bottom"; then, travel horizontally to the right and in the column "90 MAX 90 MIN" find the dimension 24'-6"; the maximum allowable distance between expansion joints is 2 x 24'-6" or 49'-0". The water level on the roof must not reach any point where the the roofing membrane terminates or has been punctured, such as at cleats. Getting the correct tie-in from the flashing material is critical. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page. This detail illustrates a copper cap flashing installed over a masonry wall. Allow the ends of the flashing to extend past the ends of the wall 8 inches. His hobbies include horses, motorcycles, road racing and sport fishing. The roll near top of wall suggests a cast concrete cap on the brick wall overhanging by an inch or two. See images for installation method examples. Old flashing may begin to fail before the new roofs lifespan is over. 15 Reardon Road - Medford, MA - 02155
The brick surface is too rough to ensure a good bond of the membrane (either EPDM or asphalt based) The gravel should be swept back from the base of the parapet and imbedded gravel should be scraped off until the roofing is smooth. Not worth getting it on ya for three or four feet worth but a whole wall - only takes five minuites to scrub up. Flashing is installed to surround roof features, such as vents, chimneys and skylights. If this is not possible, the penetrations through the flashing should be properly sealed. Attaching flashing to a parapet wall requires basic sheet metal tools and knowledge of sheet metal or copper soldering. All of the manufacturers have a detail to tie in EPDM to asphalt roofs, but it has to be done correctly. Unles it was done in the last ten or fifteen years, the silver coating probably has asbestos in it too. See note under Special Conditions regarding short parapet walls. EPDM can be used in this application. If this roof is pushing that time frame then maybe you should consider total replacement by a flat roofing contractor. And since the boy is a certified juvenile delinquient, much of the damage is probably "vandalism" rather than age. Can the epdm stay exposed, or does it need to be protected from uv and stuff? Cut a 45-degree angle on an end that meets another parapet wall. I was in the local roofing supply house today, and a roofer (who doesn'twork there) suggeste3d galvanized base and counter flashing. You need to get on the ferry and come to the mainland a little more often. of flat roofs. Then a top cap of metal was installed by the SM guys. At the edge of these roofs, parapet walls are commonly found, and are vulnerable to leaks if not flashed correctly. This coping is fully covered by a copper cap flashing. Fully Licensed & InsuredMA HIC REG. Typically, 10- by 8-inch (253 mm x 203 mm) flashing is chosen. If a wall corner is on the rooftop, you will need to create a corner flashing piece using a typical step flashing piece. I would not frame a house for a client. NOTE: Not all products featured will be available in your area. This strip is inserted into a reglet cut or cast into the top of the coping. Typically flat roofs on industrial / commercial buildings last 20 yrs. Riverside also offers installation services in Massachusetts and parts of of New England. The counterflashing at the roof side of the coping is nailed to the wood blocking. Also, don't make the whole thing out of one piece. So, chances are, if youve been looking into your roof and its flashing, you have questions. Cuz winter here lasts about 3 weeks, and thats the end of January.Whenever you are asked if you can do a job, tell'em "Certainly, I can!" It's a sandwich of asphalt-fabric-copper-fabric-asphalt that is applied with mastic. a few years ago, because of the asbestos content. We used 20# perforated asbestos roofing paper seated in plastic roof cememnt - the stiff fibred stuff. Ok, so I fasten 3/8 ply to the back side of the parapet, sweep back the gravel, apply asphalt-based membrane on the ply and down onto the roof, then 1: what do I do with the top of the parapet wall, and 2: how do I seal the parapet membrane to the roof? Solder the mitered ends of pieces together at corners using the same solder. Then get busy and find out how to do it. Well, she wants it fixed soon, but since it doesn't leak into finished space it's not urgent. Both for your sake, your future reputation, your clients sake and the future ownerwho could be a potential future client for new renovations. Many apartments and condominiums have flat sections of roof designed for air conditioning or other roof-mounted equipment.
I have lurked on this forum for several years but although I understand residential construction, I do not have the practical knowledge to be able to participate in most discussions. While I understand the interest in not disturbing the existing roof, your photo shows that the existing membrane on the parapet is cracked almost all the way down to the roof deck. If you have Autocad I can point you to the detail on the Firestone web site. I may have put that on there twenty years ago! A combination of elements are used in this detail. Looks like you didn't finish. First a few details: It's not my house, it's a good long-term client. The cap flashing is then locked over the edge strips. It goes on with contact cement, meaning that you need a smooth, clean contact surface to adhere to. However, roofing professionals in North America now prefer other materials: Building codes may demand your roofing professional use a specific material for flashing. If this is a repair job, the siding must also be removed and replaced with the flashing. The top edge of the base flashing is cleated to the new wall. The top of the wall is covered by a copper coping cover, similar to Detail 9.3A. Is there asphalt left between the layers of felt or has it become brittle, which is a sign of a failing roof. Would you just lap the pieces and seal with a good caulk? The cap flashing is then locked to the edge strip. Two questions: tie into the existing membrane, and expansion joints. cold rolled copper is specified as a flat coping cover on an 8" thick parapet wall. The dowel securing the masonry coping is fully covered by a copper cap soldered to the flashing. Installing a roof plumbing vent is typically an easier task than flashing a chimney. If you find some flashing on your roof that youre concerned about, we suggest you find a professional roofer through IKOs Contractor Locator. The flashing is continuous and projects beyond the face on both sides of the wall. Put on work gloves. I would probably have a roofer look at this because I would lean toward using a hot applied process over the cold application. The copper coping cover is locked over the cleat to form a drip. Expansion joints typically use a drive cleat (see Basic Details) set in 2 beads of sealant, 1/4" to 3/8" wide on each side of the joint. You and I have had poststogether in the past and I don't get the stone busting now???!! The main EPDM membrane is then glued to the uncured membrane. I'd use torch down I'd cut 7 3/4" cant strips from 3/4 plywood (6 8ft strips per sheet) i use the torchdown cut in 2" strips to hold the cant strip like set'n em in a hot tar base i then cover it all with torch down i like 12" torched to the old roof i cover the the cant with 30lb felt so the torchdown floats over it then i like to torch a min of 6" to the wall i can work with about 6ft at a time with one helper it'd be cool to be able to do it long and only have a seam every 33ft.. but just too hard to work on tall walls i like to diamond cut a 1/2" saw cut in the brick wall about 7" above the top of the cant strip and glue or peg a metal flashing that will over lap the top edge of the torch down doing this i have never had a problem in thousands of feet run (yet). If it does, follow our first installation procedure. Stick to fixing the wall cap. Good point on the rotted wood decking. trim the piece for a tight fit, if necessary. This year we installed / replaced over 1,000,000 sq.ft. Metal flashing is intended as a UV protection for bituminous membranes and is not intended as a waterproofing layer. For most copper work, you have to use red rosin paper as a bond breaker to keep it from sticking to the felt. More than likely, this was a 3 ply hot builtup. Well hot-dam we finally got some expert advice! Data sheet; http://www.sandellmfg.com/SPEC%20DATA%20SHEET%20PDFS/TSDS%20Copper%20Fabric%20Flashing.pdf. Ed, my best advise would be to hire a professional. I solved the leak at the master BR fireplace it has rained very hard twice since then and nary a drip so she is happy and not in a hurry to fix the garage. To decide whether or not your flashing can be reused, your roofer will need to remove the flashing carefully to prevent damaging it. In fact, if you live in Florida, you may find that your building codes call for a special flashing material, modified bitumen roofing tape: When you install roof flashing, you will need to use a sealant. The asbestos would be mostly encapsualted. There are almost as many types of roof flashing as there are parts of the roof! it sounds terrible at first, but the nice wartm squishy feeling is nice once you get used to it and you quickly learn technique for squeezing it out from your palm while spreading it with the edge of your hand or forefinger, coating a surface three feet wide. The detail illustrates a copper cap flashing installed over a masonry wall. It is only a danger if it is turning dust fibres into the air. There are other types of premade flashing that are not made to be used on roofs and may break if you try to install them on a roof. They may also list a minimum thickness. Here is how you do it: Do you need information about how to install the other kinds of roof flashing? How would you reair it? Adjacent sheets are joined with standing seams or transverse seams that are locked and soldered. There are polyester fabrics available for work like this too, but I have not used them. units and etc. Referring to Table 10Bfor 20 oz. The copper flashing is a through-wall flashing used in masonry cavity walls and not meant for exposed flashing for built-up roofs. Any caulking used to seal the joints in the metal or from the metal to the roofing would be broken in a short period of time. Further, your step flashing pieces need to be 10 inches (254 mm) long and at least 2 inches (50 mm) wider than the exposure of the shingle youre using. T. Roosevelt. Get home building tips, offers, and expert advice in your inbox. The particular roof in question is the detached garage. Its lower edge should be formed into a drip, either by projecting out over the wall as shown here or by introducing a bent drip edge as shown in Detail 9.3J. The coping flashing locks into this strip then runs over the old wall. Start your subscription today and save up to 76%. The cap flashing, therefore, does not fully cover the coping. cover plates,
Hey, it's great to find some good solid information on this. The coping cover is locked into place. No offense intended. Typically, a roofer will replace step flashing on a new roof. It is a 40 year product, so you would be putting a 40 year flashing on a roof that might only have another five or ten years left in it.Kinda like putting a thousand dolars worth of tires on a four hundred dollar Ford. Otherwise, make a straight cut with the miter saw. Your client has a $1,000,000 house. But Im concerned about sealing the base flashing to the roof covering. These instructions are only to help homeowners understand what to expect from their roofing professional. He studied architecture at Taft Junior College. This website uses cookies to provide necessary functionality and to improve your online experience. These seams are typically locked and soldered. Durable Wide-Plank Floors Made From Hickory, Podcast 481: Detailing a Slab, High-Performance Water Heaters, and DIY Dense-Pack, Podcast 480: PRO TALK With Painter-Remodelers Miquel and David McCarley, Industry-First Cordless Rebar Cutter and Bender, Plus, get an extra 20% off with code GIFT20, 10 Steps to Install Crown Molding on Cabinets, Choosing the Right Construction Tape for the Job, Pretty Good House Book Excerpt: Copper Farmhouse, 10 Dos and Don'ts for Electric In-Floor Heat, Framing Stairs to an Out-of-Level Landing, Good-Looking and Long-Lasting Traditional Gutters, The Fine Homebuilding Interview: William B. You don't clean out your own Porta Potties, do you. units and etc. This one did not go over the limestone cao on the wall, so a reglet was cut beneath the stone and the galvanized counter flashing tucked, wedged and caulked. The roof membrane itself is in very good condition, it's the parapet flashing that's bad. After all, each roof feature needs protection. I had considered usding his face to sprread the mastic Unfortunatley, he is a totally spoiled brat, and daddy can't see it. Hunt Country Masonry, Inc. A continuous copper cleat, of 20 oz. It looks like 30# felt, or some type of roofing fabric, painted silver. This is a dialog window which overlays the main content of the page. Continuous copper edge strips are then fastened to the wood blocking. Before you learn how to install roof flashing, you need to understand that there are three primary techniques, each suitable for different areas on the roof. Youll find that some types of flashing correspond to a specific technique. I talked with Sandell tech support and told them what I wanted to do with it, and he said that would be a good application. The first two depictions are alternative transverse seams for joining adjacent sheets of copper cap flashing. All rights reserved. Plus, get tips for a clean and solid installation. Step flashing is the most time-consuming of all flashing jobs on the roof because you must complete it step-by-step as you shingle up the roof. Then, the roofer will have to seal this indent up, after placing the flashing. EPDM is fine in direct UV erxposure, but the adhesion is a problem. But if i were able to clean that crappy cap off the wall fairly easy, I might consider a metal one. At the edge of these roofs, parapet walls are commonly found, and are vulnerable to leaks if not flashed correctly. After peeling away the backing, press the sides of the flashing down and against the inner and outer faces of the wall. On the roof side, the cover is locked into a standing seam parapet cover. The only question is how to seal the flashing to the existing roof. In 35 years, he's gained expertise in all phases of residential construction, retrofit and remodeling.
The factory tech rep says it is appropriate for this application. This site is protected by reCAPTCHA and the Google. I would NOT use torch applied membranes period. Then get busy and find out how to do it. What is the chance that the coating and/or paper contain asbestos, and is it a problem for either type of remediation? The projections provide drips. Start by tearing off the loose crumbly paper on there now, but cutting it loose near the top of the cant strip so it doesn't tear down into the roof itself. If it's not leaking, why not leave it alone thru the winter and do it right after the weather gets nice in the spring? Not really, but I can tell you what it is and how I would fix it - if the roof surface itself is OK.
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