Min Order: 500 pieces. At an inside corner, slide the first piece in so its bottom lip slips between the two boards. Butyl rubber adhesive backing self-adheres for easy installation on site. They can be used alongside various roofing materials,. Top wall flashing makes corrugated roof flashing 75% easier to. . Prime overall with one full coat of Bulls Eye® 1-2-3 Primer Sealer in accordance with the manufacturer’s instructions. few easy steps to stop CHIMNEY FLASHING from LEAKING. Install 6-in. 12. Expanding foam not on a roof. This self-adhesive bitumen strip bonds instantly to a wide variety of building materials, providing a permanent watertight seal. Flexible 2. Applying patination oil for lead Provided you’ve followed our storage advice and your lead flashing has been installed professionally, it’s. Our range of pitched roof pipe flashing is perfect for creating a weatherproof and watertight seal around any pipe to protect your roof from water damage. These rubber boots fail, allowing water, ice, sleet, rain, and animals into your attic. Repairing cracked vent booting: $10 to $20. Ask a question. · Install counter/cap flashing and caulk, using the correct type of caulking. CLICK HERE FOR EVOBUILD WEBSITE. But If you wanted to do a codge, then all thats needed is to lightly hammer the lead over to seal the hole - a tiny bit of bossing. Adhesive is, at best, a bodge. Today's best lead price £2. It's been fine for years but all of a sudden it's started leaking (it's been raining heavily recently). Adiseal can be cold applied. Tape along the bottom of the flap and at the corners with housewrap tape. Adjacent pieces should overlap at least 51 mm (2 inches). Cap repair costs $200 to $700. FlashMate can be painted and it will not crack. Bend 1 side of the flashing around 1 edge of the chimney. Lead Sheet Sealant. if you dont you will end up with the sealer stuck to the lead and not the bricks. ALSAN FLASHING is a unique polyurethane bituminous resin specifically formulated for liquid-applied flashings, details and maintenance applications. Shape the lead flashing. . A chimney stack that goes. Later on, rinse the surface with clean water. How to repair a chimney leak. 1. -wide asphalt flashing tape and apply it over the sides of the flashing pan and onto the shingle and underlayment. In areas. Excellent weatherproofing capabilities. Step 1. 20. Oatey® Roof Flashings can be used in commercial and residential applications where a water. Counter flashing. Step 1 - Safely Get on the Roof To seal your roof flashing you first have to get on the roof. In this guide, we will walk you through the step-by-step process of assessing the condition of your existing flashing, gathering the necessary tools and materials, preparing the chimney and roof surface, applying the flashing sealant, securing the flashing in place, and inspecting the seal. There to preserve the part of the chimney where it meets the tiles, flashing is a crucial part of your chimney’s design. Grade Sn50, 50 percent tin and 50 percent lead. ALSAN FLASHING utilizes either Polyfleece or ALSAN Pre-Cut Fleece that, in combination with its unique chemistry, provides an extremely durable and easy to apply flashing. At last there is a fully flexible, completely lead-free flashing that is super fast and easy to install. Next comes the counterflashing: A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step. The first, bending two pieces and caulking the joint (Photos 1 – 3), is the most common because you can do it on the spot with the flashing at hand. CT1 can affix lead to brick or any other base. In this arrangement, first staple felt or building paper to the sheathing, with the top pieces overlapping the lower pieces. Patch repair existing flashing (with scaffolding) £550. RoofCo is a roofing and solar company committed to providing a transparent look at how to do all things roofing! Our goal is to equip homeowners with all th. £650. There are two general types of flashing used in masonry construction. 4. SIDEWALL FLASHING. Seal all penetrations in the foundation wall and at joints between the foundation and exterior above-grade walls. It's got an asbestos roof which has been sealed against the house with sand and cement. 5m in length. The reglet is then filled with sealant. Sealed Roof Deck Option #3 For asphalt, metal, mineral surfaced, slate and slate-3. Closed valley approach with the trimmed shingle edges on both sides of the valley. The key to success with any flashing detail is to follow the shingle. Cured sealant may be carefully cut away with a sharp-edged tool. When dealing with a difficult leak, enlist a helper, and then go up on the roof with a garden hose. Next comes another layer of building wrap, installed like the first layer. Page 1 of 2 1 2 Next > nyck New Member My mate helped me put in some. there by trapping water behind and in. Cleaning the wall before you apply CT1 lead flashing sealant has many advantages, and we recommend our multi-solve multipurpose solvent for the cleaning. Roof flashing repair costs $200 to $500. Chimney flashing exists at the base of the stack. . Step 2: Proceed to place your new. For best protection, add a metal drip cap at the top of the window, caulked directly to sheathing. Lead-time Most Stramit® Flashing is made to order regardless of whether it is a standard design or custom designed. Bonding lead flashing with traditional adhesives opens it up to damage and failure in the future. This one-part, neutral-cure, high-performance silicone-based sealant has been specially formulated for use with lead sheet flashings and its elastic properties make it ideally suited for pointing between lead and brickwork or masonry. Boiler flue flashing products are typically used when installing a vertical flue kit through a flat or angled roof, as it will provide a weather tight seal to the roof and stop any water leaking into the flue system. Then, apply sealant. 4 in. Double-lap flashing – used on slate or plane-tiled roofs with a pitch of more than 30 degrees; Chimney flashing; Apron flashing; Flashing comes in several materials: lead, zinc and bitumen (used on felted roofs). If caught early enough, and if the chimney flashing was originally installed correctly, you may just need to have the area resealed with a polyurethane caulk or another type of flashing sealant. It combines a whitecreped, high-density polyethylene (HDPE) film facer with a butyl rubber. Fill the small hole where the two parts meet with a dab of solvent-based elastomeric sealant. Special Order. As well as sealing lead, most of these sealants perfrom perfectly as adhesives to either keep in place alongsode mechanical fixings or as standalone lead adhesives. Counter flashing is bent down and installed in the mortar joints of your chimney. Step 1: Start by loosening the shingles. Browse our range of flashing for watertight roof joints and seams. Extend this mark around both. UPC. These can be polished out with a soft cloth using a mild rubbing compound such as jeweller’s rouge or, with a little more effort, a metal. This provides a suitable means by which to anchor (grout solid or wedge and seal) the continuous copper cleat. Secondly, cut a piece of fiberglass mesh large enough to cover the rusted flashing parts and ensure it extends beyond it a little on all sides. Roof flashing helps to provide a seal wherever there is a roof joint or penetration (like a chimney or vent), where there is an intersection of two roof surfaces, or where the roof meets an exterior wall. Flashing Sealant can adhere to wet or moist surfaces. 67 per kg. Step Eight: Continue to alternate between shingles and flashing until you reach the top of the roof. Lead Sheet Sealant. To keep your newly installed lead flashing protected we have Calder patination oil to help prevent the lead from staining, as well as the material below it. BEST FOR RV ROOFS. Sealant/Adhesive Container Type. The undoubted best way to seal lead flashing installation is to find an adhesive sealant with a commendable track record that. Southeastern Metals Valley Roll AL EC Flashing, 10" x 10', Aluminum 17275. Secure the kickout piece to the cement with nails or screws. CT1 sealant is available in many different colours, especially grey for perfect matching. In general, the idea is to always keep water outside of the home. £85. This sealer will help the adhesive stick to the mortar much better. Code 4 real lead flashing is 1. Grey sealants. Chimney roof leaks are usually caused by gaps or cracks between the metal flashing used to join the chimney to the roof and the chimney. Cut the patch larger than the hole, affix it with. m. MasonryDefender Chimney Flashing Sealer – Waterproof Coating for Chimney Flashings. CAgroup 350mm x 5m Terracotta Ubiflex Finio Flashing (0) $218. This is often the simplest method (Figure 3. Compare. 00 (0) Bag Checkout. The thickness of the lead flashing matters depending on what the use is. CT1 will seal and bond lead. Over time, lead flashing can get damaged, which can lead to leaks. The window flashing tape should only be used if the site is completely dry first. Repeat steps two and four until you cover the entire length where your porch roof meets the house. Table N1102. As such the sealing of the window or door assemblies into the rough opening (through the use of membrane flashing and/or sealants) should be made at the. Next comes the counterflashing: A second layer of metal is embedded in the chimney mortar joints and folded down to cover the top of the step flashing. Replace any cracked, rotted or missing siding, making sure the new piece overlaps the step flashing by at least 2 in. Lead is soft and highly malleable, making it easy to bend and mold to the roof. USA . It forms an ideal seal keeping out moisture and wind driven rain, thereby preventing mold, and saving energy by stopping air leaks and eliminating drafts. DON’T Chip, Scrape, or Sand Lead Paint. Choose the safe, durable and easy to install roof flashing on a roll for tool-free installation. Lead roof flashing is a material used to seal the joints between a roof and its supporting structure. Sealants primarily provide a seal between two metal surfaces and are used in conjunction with fasteners. Lead flashings are a common sight on almost all roof types and are a fundamental element in providing waterproof protection to roofing systems. 10 Best Sealant For Chimney Flashing. 36 inc VAT Each. (Tim Carter) (Tim Carter) Q: Tim, I really need your help. Lead Base Pipe Flashings We offer both. FLASHING GUIDE 5 Lead flashing is not recommended, however it will usually be retained when re-roofing, because it is usually cemented into the structure. You can seal it, but it's always going to be a weak spot. 1) which addresses the effect of moisture on masonry, design considerations, flashing. com A DIY way to repair splits and cracks in lead and lead flashing is to use something we call Flash band (trade name) or sometimes it is also known as flashing tape. Turbo Poly Seal makes it easy to seal between the bricks, and it makes a perfe. and 3 in. Mayco Industries Inc 3-in x 10-in Lead Vent and Pipe Flashing. Flashband. 2). Roofer quoted me £500 (vat not applicable) to remove and replace leadwork on bay window, redig brick course, remove and replace flashing around bay window roofing, dig out a channel and remove cement from roof terrace flashing and reseal with lead sealant/silicon, and reseat the roof tiles. Type "B" installations. 15 Hip Starter 21Lead flashing (1) Patio (4) Tile & grout (1) Worktop (18) Show more. Allow a minimum drying time of 1 hour in normal drying. butyl (rubber) silicone. a) paint on some sort of roofing sealant paint down the full length of the valley (that’s a no from me . Keep the tape above the shingle’s self-seal strip, and let it extend 1 in. View all: Geocel Roof Sealants. Pitch. This causes rotting and rust to occur on the windows or wall framing, which can lead to major damage. Moldable flashing tape is easy to form into an effective sill pan. It remains in the top ten defects identified by the Queensland Building and Construction Commission (QBCC) building inspectors. It should also cover up the nails holding down the shingle. Caulk and sealants come in cartridges or squeeze tubes. For best protection, add a metal drip cap at the top of the window, caulked directly to sheathing. Remove the protective paper and apply the tape to the prepared surface. Caulk the slot after the flashing has been installed. Exposed gasket head fasteners – Used in exposed fastener roof systems to attach metal panels directly to the roof deck through the panel’s surface. It’s composed of an aluminized polymer film and coated with a specially formulated rubberized asphalt adhesive. For larger holes use Yellow Jacket imbedded in Wet/Dry Roof Repair. the epdm should be adhered to the brickwork using a contact adhesive and follow up the wall right upto the flashing. A super reinforced aluminum surface and rubberized asphalt adhesive that will instantly repair gutters and flashings, metal and flat roofs, RVs and mobile homes, trucks and trailers, skylights and anywhere. £4. Crown replacement costs $1,000 to $3,000. for pricing and availability. If it becomes loose or cracked, it can cause bigger and more costly. . Flashing: This is typically lead which forms a seal between the roof tiles and the structure of the building, such as brickwork; Verges: These are the edges of the roof that is exposed above the gables; Eaves: This is the overhang of the roof that sticks out beyond the walls of. Lead is the best material to use as it weathers extremely well and can be used on all types of roof. Tough and weatherproof. There are three main types of valley flashing approaches: Open valley flashing approach that makes use of sheet metal flashing and is by far the most preferred and reliable type. Brand. (See below for a shopping list and tools. - to 6-in. All opinions or methods expressed in the video(s) are personal opinion only and for educational purposes only. 2. We've got a velux window that is leaking in the bottom corner. 48. Lead Sheet Sealant - The Experts Choice! Everflex Lead Mate Sealant is specially formulated as an alternative to mortaring lead flashing and sheet into brick, stone and concrete, providing a fully waterproof joint that will not crack or shrink. Find My Store. Flashing (weatherproofing) Weatherproofing seam between a stone chimney and a tile roof on a building in Jersey, Channel Islands. 4. Roof flashing repair costs $200 to $500. Girth Widths Stramit® Flashing is made from (and hence costsStep 1: Laying the Kickout Flashing. Tite Seal All Purpose flashing provides a barrier against water infiltration in areas prone to leaks. 4 mm (0. A super reinforced aluminum surface and rubberized asphalt adhesive that will instantly repair gutters and flashings, metal and flat roofs, RVs and mobile homes, trucks and trailers, skylights and anywhere. Some of the repellents will drip down. Remove all visible signs of organic growth and treat the areas with Zinsser Mould Killer in accordance with the manufacturer’s instructions. Keep the edge of the tape about 1 ⁄ 2 in. Bostik offers roofing and flashing adhesives based on butyl technology that make this easier, offering: Elevated durability due to butyl formulations, which will not dry out or crack. Read more. For instance, 9038 translates to February 7, 2019. com. Weathermate ™ Flexible Flashing is a self-adhering, fully adhered flashing that conforms to curved surfaces to provide a tear-resistant seal that combats water intrusion around windows, doors and other penetrations. Small Size Plumbing Vent Repair for 2-1/2 in. c) flash band it. water tight seal. In the case shown in Figures 2 and 3, the wall has been retrofitted by installing (over the existing wall sheathing) house wrap, two layers of rigid foam, wood furring strips, and new siding. This underlayment will direct any water that may get through the metal flashing onto the roofing felt. Step 3: Clean old sealant from flashing. Clean-up: Clean tools and any uncured sealant residue immediately with mineral spirits in a well-ventilated area to the outdoors. Before the introduction of lead flashing, which now forms most major applications, a number of methods were employed. ): 2. This will give you the height you need to cut your apron to (normally about 50mm –100mm up the existing chimney). . CT1 will seal and bond lead flashing onto brick. RoofingDirect. Wakaflex is Australia's leading lead free roofing flashing tape. Figures 2 and 3 show the proper locations to apply sealant, tape flashing, and metal flashing around a pipe that extends through an exterior wall. More often a complete waste of time. Find My Store. The contractor uses roof sealant or cement to create a watertight seal between the flashing and the roof surface. This one-part, neutral-cure, high-performance silicone-based sealant has been specially formulated for use with lead sheet flashings and its elastic properties make it ideally suited for pointing between lead and brickwork or masonry. Nationwide Delivery. Flexible flanged sleeves can be bought for flashing around penetrations of at least 350mm diameter. make sure the chase is free from dust and dirt before using lead sealant. Average roof repair cost. Turbo Poly Seal can be bought at I have a lean-to style conservatory and the seal between roof (10mm twin wall) and the house wall has always been a right pain. It can also be done as a stand-alone retrofit measure or as an exterior wall upgrade. Excellent flexibility +/- 25%. Proper flashing of a skylight is critical. Discount Sheet Metal Supplies for Roofing, Lead Roof Flashing Products, Sheet Metal Roofing Accessories for Roofing, Roof Vents and more. Lead is a malleable metal that is easy to work with, making it an. Climbing a ladder and walking on the roof should only be done in shoes. Put one nail in the bottom edge with a dab of caulk under it to seal the hole. polyurethane. Caravans - for sealing leaking panels. Use your hammer to tap any loose pieces. Replace any nails, sealing all exposed heads—or use nails with neoprene washers. 238. See external example below. The key to success with any flashing detail is to follow the shingle. Leave the bottom flange tape-free. Understand why the walls and flashing will caus. It’s used as part of the water-resistant barrier and requires a waterproof sealant to bond successfully. Figure 2. CBGNAW011294. Suitable for sealing lead flashing into brick, stone or concrete, as well as joints on gutters, downpipes, venting and overlaps in rigid sheet roofing. Bostik Flashband Self Adhesive Flashing Tape for Roofs is a flexible bitumen strip that bonds instantly to most building materials to provide a permanent, watertight seal. The cost to repair a leaking chimney depends on what’s causing the leak. Joints at the roof, around vent pipes, to have lead, copper or galvanized steel flashings or approved elastomeric material. Apply sealant to the inside-top corners of the rough opening (at the header) Then install the window andWakaflex® Universal Flashing Westlake RoyalTM Roofing Components’ Wakaflex® Flashing is the best choice for chimney flashings, skylight flashings, pipe flashings, side wall flashings, head wall flashings, roof-to-wall flashing, step flashing, solar flashing, flashing roof vents, and many other flashing applications. Press-sealed design for maximum leak protection. 2. Kingfisher Lead Flashing Sealant Paint for rapid easy repair of lead flashing and roof joints and leaks. Lead roof flashing is a material used to seal the joints between a roof and its supporting structure. . Our 3-step guide below will show you how to paint lead, sealing the substrate to help prevent it from causing harm. Rake out the joint to 40mm. Please refer to product and safety data sheets f. [6] At the top, roll the roof underlayment up onto the soffit and use peel-and-stick to seal the roof-soffit connection. or 3 in. Will depend on the type of tiles on the roof as to which is the best solution to seal, should definitely not be fresh air. Repointing a chimney normally costs between £500 – £1,000. Secure the flashing to the roof using roofing nails, ensuring they are under the protection of the shingles to prevent leaks. At the top, tuck metal drip-cap flashing under the siding and on top of. Flashing. Sealing new lead flashing?? Discussion in ' Builders' Talk ' started by nyck, Aug 7, 2004 . Commodity rubber boot flashing cost $5 to $10. At the top, tuck metal drip-cap flashing under the siding and on top of. With existing joints, all this mortar must be removed Brickwork Lead Pointing Sealant Brickwork Sealant Mortar 25mm (min) Hall Clip Lead Flashing Stainless steel screw, washer. Even tiny cracks around screws and can lead to wood rot. We will discuss recommended sealants in more detail later in the article. 117. Dektite Flashings Product Description. Self-adhesive waterproof flashing 9-in x 25-ft Rubberized Asphalt Roll Flashing. Looks great solution to me, but I. Fasten the Pipe Boot to the Roof Panel. Oatey® invented the flashing industry more than 100 years ago. Add to trolley. . The third type of counterflashing is used for exterior wall coverings of several types. To properly seal a soil vent pipe to a roof we fit 'flashing' this can be Lead or other suitable material. The following table shows the. Remove half the backing, adhere the membrane to the corner flashing, and peel away the remaining backing. Above all, the zip system huber zip tape is quickly and easily applied by using a zip system roller, maximizing jobsite efficiency. Roof flashing helps waterproof your roof and prevent damage caused by leaks. Seal the cap flashing by caulking along the mortar joint with polyurethane caulk. 5m in length, with laps of not less than 100mm. The chase doesnt seem to be filled in, I would have expected it to have been pointed with mortar or a sealant. Roof Materials Expenses Associated with Flashing Installations and Repairs. The Oatey All-Flash® No-Calk® Thermoplastic roof flashing has a multi-size, self-sealing collar that can create a watertight seal for any Type "B" roof installation, with a vent pipe diameter from 1-1/2-in. Calder Lead Roofing Expansion Joint - 3m x 400mm. A sleeve is commonly used, though silicone sealant has a wider operating temperature range and is available inVELUX EDP CK04 0000 Single Flashing for Plain Tile 55 x 98cm. Metric Sealing Stainless SteelTamper-Resistant Button Head Torx Screws. Avoid using old fashioned vent pipe flashings that utilize rubber or neoprene gaskets to seal out water which fail in a matter years allowing. While flashing stops water from getting into your roof’s weak points, sealing or caulking adds extra protection to the whole roof system. ALSAN® FLASHING. Install weep holes at the bottom course of all brick walls. These step flashings are the most common roof flashings after the standard plumbing vent flashing. In order to do so safely, you will need an extension ladder and rubber-soled non-slip shoes. Resealing your flashing is straightforward and may require specific materials. )SUBSCRIBE to. For a metal roof system, a silicone sealant is preferred as it adheres well to metal and other common construction material. diameter. The lead flashing should be checked to see if there are any splits showing also if it has come loose from the wall chase , if so re dress back into the chase a refix using lead wedge then seal using lead sealant , sealant is used because lead moves , stretches and sealant is flexible, pug cracks in time and falls outDamaged flashing. 3M™ Grid Air Sealing Tape 8068. Identify the problem. The next step is to mark and cut the grooves in the chimney’s mortar joints to accept the cap flashing. Installing roof flashing? This is how to properly install a top wall flashing on a polycarbonate roof. My. The CT1 sealant is only perfect for sealing lead flashing because of a single reason. In this video we’ll show you how to install roof flashing around a chimney. What are the. If you have a leaking roof and suspect it might be the lead flashing at fault, see our extensive range of roof repair products for general maintenance or emergency repair work. 00051131569508. Cut two strips of 4-in. Today’s roofs cost a lot and last a long time—30 years to 50 years—so you need a boot that’s up for the. This approach can work, of course,. No-one had proposed a sleeve (if I understand it - take off a few tiles around the crack, cut the lead and add a piece under/over, then replace tiles). Its inert qualities mean that Wakaflex can be installed with all roofing materials and will not contaminate any runoff being collected and used for domestic purposes, making safe. The first is called step flashing: Sections of L-shaped sheet metal are woven into the shingle courses and lapped up the side of the chimney. CAgroup 600mm x 5m Terracotta Ubiflex Finio Flashing (0) $337. , Safety Rail Systems, Saw Blades, Sealants, Sealing Washers, Snow Guards, Spray Polyurethane Foam, Stinger, Stainless Nails/Fasteners , Tarps, TPO. Is your flashing in one continuous length? 4. Sold as flashing tape, flexible flashing, and peel-and-stick window flashing, these narrow rolls of rubberized asphalt membrane can solve many flashing problems if installed correctly. EVO-STIK Lead and Gutter Silicone Sealant is a low modulus, neutral cure sealant, which is suitable for high movement joints that are exposed to extreme weather, such as sealing and pointing of lead flashing, joints in gutters and downpipes, and overlaps in rigid sheet roofing. This can lead to a multitude. We will look at your chimney during home inspections in Chicago and. The flashing is inserted into this reglet and held by lead wedges. DEKS 280mm Fast Flash Roll. 99 Inc. Squirt a load of good quality silicone (or better still Roofers Mate) into , and around the crack, and then squash some flashband on it, and you will have a repair that could potentially last many years. Products in Lead Fixings & Sealants: Showing 1 - 28 of 28 products. Model # TSF925. It is also. In order to do so safely, you will need an extension ladder and rubber-soled non-slip shoes. Excess silicone sealant should be avoided, as it will add to he risk. Just would rather seal it against the elements and. It’s also one of the longest-lasting, with a life span of over 200 years. 3M Sealing Tapes and Films offer a wide variety of insulation and environmental barriers for your application. The lead flashing is seen as light gray sheets at the base of the chimney. 69Inc Vat. Pro tip: Seal the corners of the WRB with tape, but don’t fasten the WRB to the whole length of the head flash. Repairing Chimney Flashing leak in 5 minutes. Occasionally the patina formed on lead looks patchy and unattractive. A super reinforced aluminum surface and rubberized asphalt adhesive that will instantly repair gutters and flashings, metal and flat roofs, RVs and mobile homes, trucks and trailers, skylights and anywhere. - cut away affected felt. The sealant of choice to seal lead flashing appears to be silicone sealant but why does this sealant fail? CT1 sealant is a unique hybrid formula that can be applied on wet surfaces even underwater. Once the problem is rectified, consider fitting a gutter guard or netting to prevent any further build up of debris. Flashing will sometimes require resealing because the seal can water over time. Proper flashing around a chimney includes two layers. Squirt a bit of gutter caulk or silicone sealer to seal any joints that don’t overlap 4″ or more. The correct way to cure the leak would be to appoint a roofer who is competent in lead working, he will assess the condition of the lead, and suggest a renewal of the flashing or a simple spot repair, by lead welding. for pricing and availability. g. 1. The manufacture and delivery times are aligned with those of roof and wall sheeting manufacture. Sealant skins within 24 hours, is functional within 3 days and reaches full cure in about 1 week. Use a liquid sealant to Repair Flat Roof Flashing Leaks DIY. The cost of replacing chimney flashing starts at around $400 and ranges up to $1,600 for more complicated jobs or for double chimneys, for an overall average of about $1,000. if the flashing is turned in with a roll back then you can slip a length of building. 09 each (minimum order of 30) Select Options. Before you apply any caulk or flashing cement, you want to make sure the flashing is secure and none of the pieces are loose. Plug pinholes with roofing cement, and patch holes up to about 3/4 inch in diameter with a patch from the same material as the flashing. Get free shipping on qualified Roll Flashing products or Buy Online Pick Up in Store today in the Building Materials Department. Many.