More often a complete waste of time. Lead is soft and highly malleable, making it easy to bend and mold to the roof. The required weight depends on the application and is outlined in the discussion related to each detail. (£24. The lot code for Loctite PL Roof & Flashing Polyurethane Sealant follows this format: HE9038R302, where 9 represents the last digit of the year of manufacture, and 038 signifies the day of manufacture based on 365 days per year. DEKS, Cromar, and Ubbink are among many to have given the market greater choice to keep roofs and flashings lead-free, while maintaining the classic look, integrity and functionality of lead. BEST OVERALL: LR Liquid Rubber Waterproof Sealant – Multi-Surface. It’s used as part of the water-resistant barrier and requires a waterproof sealant to bond successfully. Old flashing will need to be pried off the roof so new flashing can be nailed in its place to strengthen the seal around the base of the chimney. Long life sealant, that is lead grey in colour. There are two good ways to handle corner flashing. Allow a minimum drying time of 1 hour in normal drying. In this arrangement, first staple felt or building paper to the sheathing, with the top pieces overlapping the lower pieces. Repeat—shingle, step flashing, shingle, step flashing—all the way up both sides of the dormer. Lead Flashing (1-1/2 in. Now it’s time for chimney flashing sealant. 00 incl VAT. However, lead must be managed and disposed of as a hazardous waste under the Resource Conservation and Recovery Act (RCRA) subtitle C. 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. The sealant is perfect for use with aluminum, galvanized steel, wood, copper, vinyl, asphalt, concrete and brick. Additionally, if you ever need to redo the roof, it will be a pain to deal with the wires that are now in the way. 9 x 3 Air Brick Buff. For example, where you would normally use code 4 lead for window flashings you can use Easy Lead Self Adhesive Lead Alternative instead of lead flashing. 49. Put one nail in the bottom edge with a dab of caulk under it to seal the hole. Further, replace shingles with signs of wear or damage. It's been fine for years but all of a sudden it's started leaking (it's been raining heavily recently). Options available. . 21 Nov:. Most customers found that the flash is used to buy zip tape from Lowes. The will allow the overlapping flashing or counter flashing to slide into the slot. If you are going to paint on a temporary repair, use a product called Acropyl, this has glass fibre. Self-adhesive waterproof flashing 9-in x 25-ft Rubberized Asphalt Roll Flashing. 3 in. Self-adhesive waterproof flashing 9-in x 25-ft Rubberized Asphalt Roll Flashing. It is advised to use the chisel to loosen and remove larger and more stubborn sealant remnants. . CT1 as a roof sealant has none of these disadvantages. 4. Caulk and sealants come in cartridges or squeeze tubes. The window is now ready for casing and siding. Wait until the sealant becomes hard before you proceed to the next step. At B&Q, we offer sealants for every purpose, along with sealant removal tools and guns for precise application. This flashing method is considered the most satisfactory method of preventing leaks except in areas exposed to earthquakes. Allow to dry. to 2 in. Oatey® invented the flashing industry more than 100 years ago. You’ll also want to factor in the. 1. For profile style clay roofing tiles, this can be 2 1/2 -pound lead or dead-soft aluminum with an 18-inch-wide skirt (Figure 2-33 shown here). . flashing adjusts to most roof pitches; 30 gauge. Next, install flexible flashing tape in a half moon below the pipe, overlapping the housewrap. Pipe flashings protruding through a clay tile roof generally get both a primary flashing when the underlayment is installed and a secondary soft-metal underlayment that conforms to the tile. 02 9666 1069. – Step 3: adhering the Effisus. 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. 9 /5 · 4 reviews ·Peel & Seal Instant Waterproof Repairs 6-in x 25-ft Aluminum Roll Flashing. Further, they say that the flashing can be used in the sun be positive about the. Flexible 2. This one-part, neutral-cure, high-performance silicone-based sealant has been specially formulated for use with lead sheet flashings and its elastic properties. Repairing the Flashing. The following table shows the. "plaster" (lead seal) repairs are useless against the power of expansion. Today Oatey Flashings are used in commercial and residential applications where a water-tight seal around plumbing vent pipe or outside wall penetrations is required. Compare $ 10. Roof leak repair costs $500 to $1,200 on average to seal the leak and replace shingles. Silicone-based. Clean-up: Clean tools and any uncured sealant residue immediately with mineral spirits in a well-ventilated area to the outdoors. Excellent low and high (+150°C) temperature resistance. Cleaning the wall before you apply CT1 lead flashing sealant has many advantages, and we recommend our multi-solve multipurpose solvent for the cleaning. **Synthetic underlayment meeting the performance requirements specified is also permitted. Press it firmly into place, nailing it off in several places high up the wall. Scope. Chalk a straight line about 2 inches above the back of the base flashing. Set the top part of the vent on the pipe. All opinions or methods expressed in the video(s) are personal opinion only and for educational purposes only. Lead flashing is a piece of milled lead that sits between joints to create a durable and weathertight seal. 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. The product is specially formulated as an alternat-ive to mortaring Lead Flashing and Sheet into Brick, Stone and Concrete. Use FlashSeal to solve problem leaks around the base of chimneys, stacks, and vents. 41 – $ 10. if you dont you will end up with the sealer stuck to the lead and not the bricks. Effective roof flashing around a chimney includes two layers. . 08 Head and Apron Flashing 12 3. A water-based primer should be used to enhance the bond with the EPS foam. Not only that, but this could be a safety hazard as well. for pricing and availability. [1] 2. See external example below. Good UV and weather resistance. Ideal for sealing and pointing lead flashing and overlaps in rigid sheet roofing. Why Use Lead Pointing Sealant on Lead Flashing This is due to the inability of the mortar to expand and contract at the same rate and the lead during temperature changes. Installing roof flashing? This is how to properly install a top wall flashing on a polycarbonate roof. Skylight Flashing. Getting the right sealant on your flashing is the best bet. For a metal roof system, a silicone sealant is preferred as it adheres well to metal and other common construction material. Now seal the slot with a caulking gun after the flashing is installed. butyl (rubber) silicone. Copper Fixing Strip for Lead (50mm x 20m Roll) - 0. doitall, Aug 22, 2004. or 3 in. . We will look at your chimney during home inspections in Chicago and. I think it probably needs clearing out and re-seal along. Push it into the joint and up the wall so that the rubber firmly adheres to the surface beneath. Use for all types of flashing applications on roofing projects; such as step flashing, corners, sky lights, roof vents, and chimneys. Flashing is a term applied to any thin strip of material used to prevent water ingress into a property. The joint should then be pointed with mortar or using suitable exterior grade sealant . Flashing joints are lapped 6" in the. If it becomes loose or cracked, it can cause bigger and more costly. Wakaflex is a lead-free. Step Nine: To flash the peak of the roof, you will need to create another custom piece of. If you can’t get a better flashing locally, you can order it online—just plan ahead for the lead time. It’s purpose is to seal off the top of the base flashing. The best way to seal lead flashing installation. there by trapping water behind and in. Press the flashing into the urethane to achieve a positive seal. ★★★★★ ★★★★★. Counter flashing is bent down and installed in the mortar joints of your chimney. Before the introduction of lead flashing, which now forms most major applications, a number of methods were employed. Scotch® Heavy-Duty Mining Tape 31. Excess silicone sealant should be avoided, as it will add to he risk. Install from the bottom up, lapping each piece on top of the lower one. Things like weather, sun, and time can make your roof weaker, causing leaks or damage. We've got a velux window that is leaking in the bottom corner. This is a quick-and-dirty fix for a window that sti. Start low, soaking the area just above where the leak appears in the house. Often, there's old, hardened caulk where the two pieces overlap at the inside corner. Lead roof flashing is a material used to seal the joints between a roof and its supporting structure. It is advised to use the chisel to loosen and remove larger and more stubborn sealant remnants. Solution used: Effisus Bond FT. The flashing needs to be installed before installing the roof shingles. Get free shipping on qualified Vent Pipe Flashing products or Buy Online Pick Up in Store today in the Building Materials Department. Having taken the tiles up I think water is pooling and backflowing over the edge of the flashing nearest the window. If none appear, move to the right or left side of the penetration and let the water run over the area for. In this quick tutorial, I show you our method of installing a rubber vent pipe boot on a metal roof. Step. 238. 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. Get free shipping on qualified Roll Flashing products or Buy Online Pick Up in Store today in the Building Materials Department. 13 Flat / Low, Medium and High Profile Tile 19 3. Lead Slates are used where a pipe penetrates a roof covering to ensure the joints are fully watertight. Flashing tape is often referred to as lead flashing tape but is mainly constructed of aluminium foil and bitumen rubber adhesive. 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). Secure the kickout piece to the cement with nails or screws. CT1 will seal and bond lead flashing onto brick. View all: Geocel Roof Sealants. For extra protection, run a bead of urethane between the step-flashing and the chimney. Read more All opinions or methods expressed in the video(s) are personal opinion only and for educational purposes only. You will not find any tar or paint-on flashing material used in this video. Screwfix customers rate this product 4. It is heat-resistant and is used to provide an immediate watertight seal on a huge range of surfaces making it an essential part of any roofing project. No Nonsense Lead Sheet Sealant Grey 310ml. 5070 10. The cost of replacing flashings ranges from $600 to $20,000, depending on the size of the roof repairs and the materials comprising the flashing. Flashing will sometimes require resealing because the seal can water over time. Always check current regulations or seek secon. BEST FOR RV ROOFS. Your front lead apron will need to be cut into a mortar course of your brick or stone chimney so when cutting your apron you will need to work out which mortar course you are going to fix into. Used to seal gaps, lead & lead roof flashings prevent rainwater from entering a property and protect it against the dangers of damp ingress, making lead flashing roofs extremely durable. 10 in. Use your hammer to tap any loose pieces. When reroofing a home or doing a renovation that creates a new penetration in the roof, inspect and replace or add flashing and sealing around all roof penetrations, such as vents, flue stacks, chimneys, sky. Roof shingle repair costs $100 to $300 to fix missing shingles or $350 to $1,000 to replace shingles in a 10'x10' area. 3M™ Indoor Window Insulator Kit, 2 Windows. . Also, it is best to leave lead flashings unfastened on one side to allow movement. " It carries the new 10-year installation warranty plus 20 years on glass, 10 years on product, and 5 years on shades and controls. The key to success with any flashing detail is to follow the shingle. -wide strips of a self-sticking waterproof underlayment. 12. However, the most critical attribute of the flashing is simple; it must be watertight. This next-generation non-toxic roof sealant eliminates the environmental concerns associated with lead flashing products while maintaining the integrity of the roof. Lead is soft and highly malleable, making it easy to bend and mold to the roof. It is a unique hybrid formula that is applicable to wet walls, including underwater. Paint for Lead Flashings. This is often the simplest method (Figure 3. The reader is also encouraged to review the companion TEK 19-4A Flashing Strategies for Concrete Masonry Walls (ref. 3M Sealing Tapes and Films offer a wide variety of insulation and environmental barriers for your application. 2. Using the circular saw and masonry blade cut a slot about 1. 25" x 2. Add to Cart. Secure the flashing to the roof using roofing nails, ensuring they are under the protection of the shingles to prevent leaks. Available in a selection of sizes. Roofing sealant. Peel & Seal Instant Waterproof Repairs 6-in x 25-ft Aluminum Roll Flashing. $24. Fast Flash is ideal for sealing around dormer windows, chimneys, roof valleys, ventilation caps, solar panels, skylights, and wall abutments. 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. Compare. 5 yrs CN Supplier . MasonryDefender Chimney Flashing Sealer – Waterproof Coating for Chimney Flashings. Aaron shows you how to repair the boot on a roof vent. Counterflashing will cover the tops of the step-flashing. Flashing membranes are now widely used to prevent water leakage around windows and doors and other trouble spots on walls. VELUX EDL MK06 0000 Single Flashing for Slate 78 x 118cm. Identify the problem. Less Draft, More LightYes, it is possible to have lots of sunlight and still tightly regulate the temperature inside your h. Lead is one of the oldest roof flashing materials. Long life sealant, that is lead grey in colour. In areas. Lead flashings should always be installed in 1. Replace any nails, sealing all exposed heads—or use nails with neoprene washers. - grind back mortar bed. Special Order. It is environmentally safe and is water-resistant, mold resistant, and mildew resistant after cure. 1 Air Barrier and Insulation Installation, Shafts/penetrations: Duct shafts, utility penetrations, and flue shafts opening to exterior or unconditioned space are air sealed. Start at the front of the chimney and mark the third mortar joint up from the roof. 5 lb. Through-Wall Flashing. Always check current regulations or seek secon. Excellent flexibility +/- 25%. CLICK HERE FOR EVOBUILD WEBSITE. Sealing Lead Flashing (52 products available) Lead Base Waterproof Pipe Boot Flashing Seals Rubber Product $12. Our 3-step guide below will show you how to paint lead, sealing the substrate to help prevent it from causing harm. above the pan. Add another liberal coating of roof cement around the outside edges of the patch to form a water-tight barrier. The final area that is a common source of conservatory roof leaks is where your conservatory joins your house. butyl (rubber) silicone. That will allow for better adhesion and a better seal. This adjustable pipe flashing has a 24-Gauge galvanized steel base suitable for commercial or residential use. Best thing to use is 3in1 oil and parafin mixture, about 1ltr to a small can. Hi. Cover the membrane with a metal closure flashing. 1. The chase doesnt seem to be filled in, I would have expected it to have been pointed with mortar or a sealant. Lead Sheet Sealant. Replace any cracked, rotted or missing siding, making sure the new piece overlaps the step flashing by at least 2 in. The undoubted best way to seal lead flashing installation is to find an adhesive sealant with a commendable track record that. 3M™ Deck and Joist Flashing Tape 8047. Wood: Not all chimneys have a wood structure where the chimney meets the roof, but some do. and down and across the roof joint (probably with about 8" overlap on the roof). Step Eight: Continue to alternate between shingles and flashing until you reach the top of the roof. Modified Polyether Sealant. A flexible self-adhering rubberized asphalt sheet waterproofing membrane is well suited for below-grade waterproofing ICF forms. If you want to help support Shannon to produce more videos like this, visit from. 1. Pro tip: Seal the corners of the WRB with tape, but don’t fasten the WRB to the whole length of the head flash. Pick a day that’s not too cold or too hot (shingles get brittle or soft, respectively), and start by using the flat bar to break the seal between the shingles. Lead Base Pipe Flashings We offer both. Wherever sealant is used that comes into contact with copper a rubber or synthetic-base sealant that is compatible with. Lead Sheet Sealant. No need for lead clips or scrunched up lead offcuts as lead flashing is secured to timber behind with clout nails - leads not lose, just a smallish 5-8mm gap between lead and underneath of sill. If the metal gutter parts have rusted through, you can quickly and eas. Add to basket. #1 Home Improvement Retailer. The counterflashing at the roof side of the coping is nailed to the wood blocking. 48. $119. Attach loose flashing securely to the chimney with masonry nails. LEAK STOPPER. 1. The flashing extends onto the roof a minimum of 2 inches - 4 inches is preferable in more severe climate areas. Suitable for sealing lead flashing into brick, stone or concrete, as well as joints on gutters, downpipes, venting and overlaps in rigid sheet roofing. 4 mm (0. Figure 2. Scope of work: sealing the perforation on a metal roof. Colour grey. 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. Lead Flashing Clip (Hallclip) - Pack of 50. There are only a few reasons why CT1 sealant is the perfect lead flashing sealant. This sealer will help the adhesive stick to the mortar much better. few options there and a variety of methods to consider. Closed valley approach with the trimmed shingle edges on both sides of the valley. Trex Protect can waterproof the tops of the deck joists, rim joists, beams, and the ledger board. Flashband is a great choice for repairs to lead flashing, sealing valley gutters or. 2. Caravans - for sealing leaking panels. If you still get a leak it's either coming down through the brickwork, check for cracks, check soffit roof etc in case it's coming. This causes rotting and rust to occur on the windows or wall framing, which can lead to major damage. method 1. Use a regular paintbrush to apply the sealer to the brick. Metric Sealing Stainless SteelTamper-Resistant Button Head Torx Screws. 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. A sealant that can be used with lead flashing and rigid sheet roofing to ensure it stays watertight and leak-proof. pipe. Apply with a rag, messy but good, comes up that nice blue colour. [6] At the top, roll the roof underlayment up onto the soffit and use peel-and-stick to seal the roof-soffit connection. Peel & Seal Instant Waterproof Repairs 6-in x 25-ft Aluminum Roll Flashing. CT1 can be applied onto a wet surface, actually even under water. We also stock: Chimney Cowls; Roof Nails, Screws & Fixings; Roof Tilesvia Titan’s Roofing. Allow a 14 working day lead time, for date of order to supply. This next-generation non-toxic roof sealant eliminates the environmental concerns associated with lead flashing products while. Self-adhesive waterproof flashing 4-in x 33-ft Butyl Rubber Roll Flashing. For profile style clay roofing tiles, this can be 2 1/2 -pound lead or dead-soft aluminum with an 18-inch-wide skirt (Figure 2-33 shown here). 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. The average cost to repair your existing chimney flashing without scaffolding is around £250. Download CAD File. Run water over the low side of the penetration for several minutes while the helper watches for any water droplets. 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. Patch repair existing flashing (with scaffolding) £550. 8 / 12. make sure the chase is free from dust and dirt before using lead sealant. Used at penetrations in roofs such as chimney stacks, dormer windows and parapet walls, lead flashings are installed to maintain a watertight roof and reduce water ingress and. The QBCC considers flashing and accessories defective if they leak under weather conditions anticipated by the Building Code of Australia (BCA). A sidewall is a junction between a wall and a sloped portion of a roof. Calder Lead Roofing Expansion Joint - 3m x 400mm. 98. The flashing extends up the wall at least 4". CT1 has a formidable adhesion and will bond to almost all roofing materials. BEST VALUE: Gorilla Waterproof Patch & Seal Tape. The CT1 sealant is only perfect for sealing lead flashing because of a single reason. Bend the flap down and nail along the top edge. 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. If you are looking for a quick fix that will actually work without appointing a roofer,then flash band may be the cheapest solution. Install new step and kick-out flashing where an existing roof meets an existing wall as part of a roof replacement. You can seal it, but it's always going to be a weak spot. This can lead to a multitude. 00076308141783. 10 Best Sealant For Chimney Flashing. The lead flashing is seen as light gray sheets at the base of the chimney. . Windows shows another option, a combination of a sill wedge and self-sealing adhesive flashing. The best way is to go around the roof, not through it. Available in a selection of sizes. Add to Cart. Cut Butyband tape to the desired length. Ideal for flashing applications, the Amerimax Flash Mate 10 oz. uv resistant + View All $ 39. Tite Seal All Purpose flashing provides a barrier against water infiltration in areas prone to leaks. Lead flashing is the thin pieces of material that prevents water from accessing the joint. Scope. Add to trolley. This is a sheet of copper with a lead coating on each side. Chimney flashing exists at the base of the stack. Flashings are available in a variety of thermoplastic, aluminum, galvanized and copper materials. Use with Yellow Jacket Reinforcing Fabric to seal moving cracks and joints. From lead work installations to lead work. Special Order. CT1 sealant is available in many different colours, especially grey for perfect matching. Step FlashingFlashings and copings are fabricated from cold rolled copper in weights ranging between 16 and 20 ounces per square foot. com. In moderate to heavy termite areas, take. 3M Stock. . ALSAN® FLASHING. Repointing a chimney normally costs between £500 – £1,000. Remove all visible signs of organic growth and treat the areas with Zinsser Mould Killer in accordance with the manufacturer’s instructions. Coping Cover. A unique self-adhesive instant waterproof repair and flashing material. Over time, lead flashing can get damaged, which can lead to leaks. Check with your nearest Stramit branch office for delivery times. Use tin snips to cut the bent base flashing that you ordered from the sheet metal shop. This approach doesn’t use sheet metal valley flashing, and. Product Details. Girth Widths Stramit® Flashing is made from (and hence costsStep 1: Laying the Kickout Flashing. This type of sealant is a relatively new entrant into the sealant world. loodgrijs wit terracotta zwart koper Leadax Flashing Original The world’s most sustainable lead replacement with the look and feel of traditional lead, without any of the negatives. Add to Cart. Inspect the lead. Cartridge. 3M™ Venture Tape™ Selfwound PVC Tape 1510R. Lead flashing wedged into joint below If you need your chimney flashing replaced, a professional will: · Remove existing flashing, as well as the surrounding shingles. Through-wall flashing is used at all points where moisture. Always check current regulations or seek secon. Set the apron. Saddle flashing creates a peak that allows water and snow to run off and prevents it from building up on your roof and chimney. Looking to seal a gap between my furnace's vent pipe & the flashing on the roof, specifically here: I'll have to check if there's a missing storm collar too, but should I use High-temp silicone, or go with the Big Box's recommendation of roofing. Remove a line of mortar across the external brickwork of your home to accommodate the flashing. It will hold water out and help seal around screw holes and metal fasteners to prevent corrosion. Ensure your job is weatherproof with the perfect flashings at Reece. and 3 in. It’s also BAL rated 19, which means it’s a great choice for use in bushfire zones. 1) which addresses the effect of moisture on masonry, design considerations, flashing. To seal your roof flashing you first have to get on the roof. 69Inc Vat. Figure 3. The next step is to mark and cut the grooves in the chimney’s mortar joints to accept the cap flashing. If you have any other repairs or. Large Size Plumbing Vent Repair for 4 in. The national average cost to hire a roofer to replace the flashing, shingles, and to seal a leak in a small area of the. Please refer to product and safety data sheets f. . Patch repair existing flashing (with scaffolding) £550. USES As an alternative to mortaring in Lead flashing and Peel & Seal Instant Waterproof Repairs 6-in x 25-ft Aluminum Roll Flashing A unique self-adhesive instant waterproof repair and flashing material. If water leaks into these cracks first, then sealing them off will trap moisture inside of your building. It is typically 1. In general, the idea is to always keep water outside of the home. com offers quality metal roof flashing, drip edge, transition flashing, step flashing, roll flashing and more. An O-ring under the head blocks leaks and seals out dust and dirt. 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. It is a unique hybrid formula that is applicable to wet walls, including underwater. Heavy white stains might form when an acid-curing silicon sealant is applied during installation. 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. In this video, Mark walks you through the installation of sidewall flashing and the details as it applies to the drip edge and when you come to a corner. Flashing protects these areas by acting both as a barrier and as a way to direct water down and off your roof. Step Nine: To flash the peak of the roof, you will need to create another custom piece of. Replacing bent or cracked flashing: $20. Next: Attach a render bead on top of the lead as per the manufacturer’s instructions, making sure it covers at least 15mm of lead. Typically manufactured from either aluminium or a lead alternative material, pipe flashing also features EPDM to ensure a tight seal around the pipe. Priming. View More. Work the lead so that it’s as tight to the wall as possible. flashings include: • Apron flashing is an over flashing usually where a roof abuts a vertical wall or penetration. 2m long, with the measured distance as the width of the lead.