If you are using a single-flue chimney cap, you just have to put it into place and, using a screwdriver, properly fasten it. Take a small amount of caulk and put it on each side of the flashing. Prebent step flashing, 8 x 8 in. Another option is to order the slightly more expensive prepainted metal flashing. Last Updated: October 8, 2020 Continue until you get to the top corner of the chimney. Ensure that the nails are spaced evenly. Measure the old cap and use those measurements to cut the new piece. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Before you do anything, get your ladder, roof brackets and safety harness set up so you can work safely and efficiently on the roof. But don't paint the bare galvanized metal without cleaning it first with lacquer thinner. Take your new chimney cap out of any packaging or container and carefully place it over your chimney crown. How to Inspect a Wood Burning Fireplace Yourself. The side cap flashing must overlap each lower flashing. Chimney caps must be slid over the chimney or into the flue. Drive the flange on the cap flashing into the groove in the mortar joint. Install cap flashing. It is a process fairly easy to complete. Step 3: Marking and Cutting the Hole on the Roof. If your cap looks crooked, has red rust stains beneath it, or your flashing is … They are used to avoid pests, debris and dirt from infiltrating into the chimney. Your new flashing will last longer with a coat of paint. I hope to have the flashing repaired using the saddle, "Very good information to know when flashing a chimney. Carefully nail the flashing into the chimney masonry and not to the roof itself. Align the chimney flashing over the hole so that it’s centered and check with a level. A bigger flue would, of course, require more money. Fit an 8-inch (20.3-cm) piece of square step flashing over the chimney's front corner. Chimney Creosote ... Chimney flashing seals the void between the roof and the chimney, but often times leaks. Include your email address to get a message when this question is answered. masonry bit and a grinder (a great excuse to buy this useful tool) or a circular saw fitted with a drycut diamond blade for grooving the mortar (Photo 7). Then nail another step flashing over this shingle. There are different options for wood stove pipe flashing, so choose based on the advice of the chimney manufacturer. Make sure the bonnet (the top of the cap) is twice the size of the fireplace flue opening. An important measurement that people always forget about, whether they are measuring to install a single flue or multi flue cap is the height of the tile that sticks out of the chimney. They are used to avoid pests, debris and dirt from infiltrating into the chimney. Saddles wider than 3 ft. may need additional support. You can now install your chimney through the cut hole. Step 5: Installing the Insulated Double Wall Chimney Pipe. The base flashing is installed beginning across the bottom of the chimney and on top of the shingles. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. around the front corner as shown. Mark the edge of the chimney on the opposite end and snip and bend this end. Using the tin snips, cut the flashing precisely 5 inches from the edge on each side. Secure a shingle over the second piece of flashing with a nail. Step Flashing A Chimney. Chimney Cap Replacement. Cut the flashing to fit along the chimney's front. Use a circular saw to saw grooves into the mortar joints. Large roofing companies often have their own sheet metal shops and are the best place to buy the chimney saddle and flashing; they'll know exactly what you need. If your chimney needs attention, we can help. Step 5 - Install Side Flashing and Cap Flashing. You'll need a sturdy extension ladder to get on the roof, and roof brackets and top-quality 2x10 planks to work safely once you get there. If you are using a single-flue chimney cap, you just have to put it into place and, using a screwdriver, properly fasten it. Once all the cap flashings are in place, complete the job by filling the groove with polyurethane caulk (Photo 12). This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2021 wikiHow, Inc. All rights reserved. Run a full 36-in.wide strip across the top of the chimney. In this article, we’ll tell you how to order new flashing and install it on a brick chimney. The basic parts of the chimney include the flue, liner, cap, flashing, crown, damper, and the smoke chamber. You will insert the new flashing in these joints. Here are some factors that can affect the chimney caps prices and the total cost of the installation: Size of your flue – if you haven’t had a chimney cap yet, the size of your flue and materials that would cater to its size. Place a small drop of caulk where the roof and chimney meet at the chimney corner. Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of the chimney. Cap flashings should be fastened to the chimney only. Create an outline for the place to install the new flashing Install the new chimney pipe flashing and tighten the installation by screwing it and applying silicone. Even with the custom-made saddle, the flashing was inexpensive. wide strips of ice-and-water barrier. But it doesn’t take an expert to spot problems—simply look for water-stained ceilings or other telltale signs of leaking in the vicinity of your chimney. Align the open bottom of the cap with the top of your chimney flue. Any homeowner can install a chimney cap. Chimney Cap Inspection by PJ Fitzpatrick. Most lumberyards stock these. These are useful tips to install Check the chimney before you install the cap. If you noticed any flashing problems when following the steps for how to install a chimney cap, call PJ Fitzpatrick. How many inches of flashing should there be at the bottom, lying against the roof, on all four sides? Clean off the roofing cement as best you can. Any cracking and peeling of your chimney flashing will eventually cause a leak that can penetrate your roof. Then press the expanding plastic anchors into the holes and pound in the protruding nail to expand the anchor and secure the flashing. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. Thanks to all authors for creating a page that has been read 169,800 times. Later you'll seal the new metal saddle to this piece with additional strips of the membrane and then install roofing paper and shingles over the metal saddle. Take pieces of step flashing to seal the sides of the chimney under each individual shingle. Installing Chimney Flashing. Chimney Caps Installation Cost Factors. And as far as chimney flashing repair cost goes, by doing it yourself, you’ll save hundreds of dollars. Make sure you take the right measurements needed to purchase the proper chimney cap. Draw a level line at least 12 in. The shape is relatively simple, so you could buy flat sheet metal, called “coil stock,” and bend these yourself. Install step flashing on the roof. Roofers call these “shingle tins”. Hammer 2 roofing nails into the flashing and roof. Cut. How to Work with Scaffolding Safely. Back cap flashing. Start by measuring the width of the chimney. Otherwise, check the Yellow Pages under “Sheet Metal.” We used 26-gauge galvanized sheet steel for our flashing and saddle, but prefinished steel or copper are other possibilities. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Front cap flashing and side cap flashing. If you must install asphalt shingles onto the chimney saddle, it’s important to install first the metal flashing, then the shingles on the saddle itself, then the shingles on the roof around the chimney. A bigger flue would, of course, require more money. deep and 1/8 in. This is the key to a successful flashing job. If your cap looks crooked, has red rust stains beneath it, or your flashing is … Chimney flashing is extremely important in roof construction and must be installed correctly in order to avoid expensive roof and ceiling repairs that are the result of water damage. Pry, chisel and scrape off old metal flashings and roofing cement. This means you have to install ridge cap shingles on the chimney saddle ridge before you install shingles on the rest of the roof. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2021 wikiHow, Inc. All rights reserved. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Measure the dimensions of the chimney and the slope of the roof before ordering the flashing pieces from a sheet metal company. Make them a few inches longer than you think is necessary, keeping in mind that each piece of cap flashing has to overlap the one below it by about 2 in. Install the Chimney Saddle. square step flashing to fit 1-1/2 in. By using our site, you agree to our. wikiHow is where trusted research and expert knowledge come together. Fit the flashing up against the front of the chimney. Step 3: Place New Cap. of rise for every 12 in. The basic parts of the chimney include the flue, liner, cap, flashing, crown, damper, and the smoke chamber. The flashing should partially overlap the shingle that covers the first piece of flashing. Since it was two years ago, it is likely that the contractor is not liable nor responsible to fix it for free. Then, the roofer will have to seal this indent up, after placing the flashing. The most popular are sweeping, tuck-pointing, liners, and so forth, however, people always tend to forget the importance if step flashing a chimney. Chimney Cap Inspection by PJ Fitzpatrick. Cut the front cap flashing 8 in. There’s nothing like a cozy blaze in the fireplace to help you unwind and warm up on a cold winter’s day. Chimney Caps Installation Cost Factors. Cut a piece of prebent base flashing to fit across the front of the chimney. ", https://www.familyhandyman.com/roof/installing-chimney-flashing/, https://www.iko.com/na/learning-center/roofing-101/what-is-roof-flashing-how-to-install-it/, http://www.ashireporter.org/HomeInspection/Articles/Chimney-Flashings/2413, https://www.todayshomeowner.com/video/how-to-repair-leaking-chimney-roof-flashing/, http://www.thisoldhouse.com/toh/article/0,,194076,00.html, https://www.youtube.com/watch?v=5KiPyR3nsTA, consider supporting our work with a contribution to wikiHow. Fit the front cap flashing around the front of the chimney. Some sheet metal shops stock a flashing for this purpose, but you'll probably have to have it made. Step 4 - Caulk. Nail the next shingle over the first step flashing. Saw 1-in. Otherwise, fill in the missing boards before installing the new saddle. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/a\/a2\/Flash-a-Chimney-Step-1-Version-3.jpg\/v4-460px-Flash-a-Chimney-Step-1-Version-3.jpg","bigUrl":"\/images\/thumb\/a\/a2\/Flash-a-Chimney-Step-1-Version-3.jpg\/aid1376016-v4-728px-Flash-a-Chimney-Step-1-Version-3.jpg","smallWidth":460,"smallHeight":345,"bigWidth":728,"bigHeight":546,"licensing":"

\u00a9 2021 wikiHow, Inc. All rights reserved. Screw tightening. We ordered all our 26-gauge galvanized metal flashing bent to the correct angles and dimensions from a sheet metal shop specializing in roofing. Use a hammer and roofing nails to attach the saddle to the roof. Front Cap Flashing, Side Cap Flashing – This is one of the most significant types of flashing to install. Place the step flashing over the caulk and onto the chimney. Flashing a chimney is an advanced DIY project. Contact us for an estimate today. It goes beneath the upper courses of roofing material, and overlaps the side or step-flashings. Contact us for an estimate today. 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. Any cracking and peeling of your chimney flashing will eventually cause a leak that can penetrate your roof. Drill a hole on each side of the chimney front. Seal the sides of the chimney with prebent pieces of step flashing under each course of shingles (Photos 4 and 5). The cap is the most common place where water damage can occur. Nail it to the roof along the top edge. Install the chimney cap as per the directions on the instruction guide. Base flashing fits under shingles along the sides of the chimney (called step flashing there) and “up roof” from the chimney; it lays on top of the shingles below the chimney. This flashing is identical to the front and side cap flashing. For starters, you have to be comfortable working on a roof. How a chimney cap protects your chimney. Cutting the groove in the mortar is easiest with a grinder and a diamond blade (Photo 7). Look for places on the chimney where you can dig out horizontal, or bed, joints. Here’s How To Avoid Chimney Fires this Winter. Outside mount models may come with metal screws for installation. Bend a piece of cap flashing to fit around the top corner of the chimney and add the cap flashing across the back of … more than the width of the chimney. Chimney cap installation tips. longer than the width of the chimney, then bend it around the front corners of the chimney. Ensure that your chimney is clean and free of clutter before installing your new cap. Installing a chimney cap. In this case, you’ll need to install a new cap. This article has been viewed 169,800 times. Apply a jelly bean–size dollop of caulk at the corner where the chimney meets the roof. We use cookies to make wikiHow great. If you noticed any flashing problems when following the steps for how to install a chimney cap, call PJ Fitzpatrick. Top-mount chimney caps are mounted on the chimney crown, and can be installed with screws or sealant depending on what the manufacturer advises. Bend 1 side of the flashing around 1 edge of the chimney. Cut a piece of galvanized flashing 10 inches longer than the chimney width. Pay close attention to overlapping each piece of flashing onto the preceding one in such a way that water is diverted over the top of the shingles. 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. A properly installation of a chimney cap will prevent water and animals from entering the chimney … The rubber boot is trimmed to fit around the … 12 Roof Repair Tips: Find and Fix a Leaking Roof. You'll need to slightly raise the metal roofing to slide your flashing into place. Secure a shingle over the corner flashing using a hammer and roofing nail. I elected to have repairs done to the chimney which included repairing cracked mortar and replacing the roof flashing and installing a stainless steel chimney cap. Making sharp, straight bends in sheet metal is tricky unless you have access to a tool called a sheet metal bending brake. For home improvement projects, contracts typically have some sort of warranty period, this period is typically at most only good for one year. Wood stove pipe flashing is incredibly important to protect both your stove and your roof. You should reinstall chimney flashing before reshingling your roof, or when you notice that the existing chimney flashing is damaged or completely rusted. Use a reciprocating saw or … Bend the clipped flashing around the chimney. wikiHow's Content Management Team carefully monitors the work from our editorial staff to ensure that each article is backed by trusted research and meets our high quality standards. In addition to the saddle, you'll need the following sheet metal parts (see Figure A): 13 Must-Do Steps to Make Sure Your Wood-Burning Fireplace is Safe and Ready for Winter. Joe walks you through how to install your chimney roof flashing. Place a second piece of 8-inch (20.3-cm) flashing against the chimney. Cut the side cap flashing to fit the angle of the roof so it overlaps each lower cap flashing at least 2 in. Install the cap flashing. I elected to have repairs done to the chimney which included repairing cracked mortar and replacing the roof flashing and installing a stainless steel chimney cap. Brick and Mortar Repair If possible, plan your flue location to fall between the building’s ceiling joists and the … How to Install a Gas Fireplace. Failing to do so will cause the damage to get worse. Proper flashing around a chimney includes two layers. DIY Chimney Cap Installation: Pros and Cons There are upsides and downsides to installing your chimney cap on your own. Home House & Components Parts of House Chimney. Start the flashing job by installing the first piece of base flashing across the bottom of the chimney and over the top of the shingles (Photo 3). We repair and install flashing with expertise, choose the perfect cap to install, and even waterproof masonry to keep water out for years to come. Buy a good pair of straight-cutting tin snips, a 3/16-in. Slate and tile roofs require special flashing techniques that are best left to the pros. galvanized roofing nails through the front edge of the flashing to hold it in place. Top-mount chimney caps are mounted on the chimney crown, and can be installed with screws or sealant depending on what the manufacturer advises. The chimney saddle will help excess rain water to run off the roof. When installing a wood stove at home, it's important to think about the chimney. Use drive-in expanding anchors to fasten the flashing. Typically made from a sheet of metal, the flashing forms a waterproof connection that keeps rain, snow, and other elements and debris from washing up and accumulating against the chimney. Bending and soldering a saddle is complicated, but sheet metal shops need only two pieces of information from you to bend up a saddle: the width of the chimney and the slope of the roof (see “How to Find Your Roof Slope,”). 4 Benefits of Chimney Caps 1. The best way to do that, according to the Chimney Safety Institute of America, is to install a chimney cap. In the pros column sits the fact that cap installation is relatively simple. To top it all off, use a circular saw to saw grooves into the mortar joints. What side does the bigger piece of flashing metal go on? Use tin snips to cut the bent base flashing that you ordered from the sheet metal shop. Do you feel that is something the contractor should be responsible for fixing? Bottom: The bottom cap flashing (or counter flashing) is a single piece of metal that covers the vertical portion of the base flashing. Step flashing a chimney is one of the important practices that make your chimney function properly. To prevent rain, small animals moisture and other things from entering the chimney, you must install a chimney cap. In addition to the flashing and shingles, buy a roll of self-adhering roofing membrane (also called ice-and-water barrier), two tubes of polyurethane caulk, and a package of 25 drive-in expanding anchors from a home center or roofing store. Place caulking along the mortar joints to seal the flashing. One of the most common types of damage a chimney cap can suffer are dents. galvanized roofing nails about every 6 in. You may have to adjust the angle by bending it to match your roof slope. Fit the front cap flashing around the front of the chimney. Some lumberyards stock a “dormer flashing” that will work in this location. The cap flashing will prevent water from coming in around the cap. You’ll want to install new chimney flashing if it’s missing, rusted through, falling out or completely covered with roofing tar (a typical short-term fix that’s sure to be hiding bigger problems). This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Complete the base flashing by nailing the saddle to the roof and sealing it with additional strips of membrane (Photo 6). Place shingles over the flat part of the saddle. There are a few different types of flashing. Ensure that each new piece of cap flashing overlaps the previous one. The vertical portion of the step flashing will later be protected with either siding, or cap flashing if installing brick or stucco. Over time, water erodes away the watertight finish that sealed the flashing or the flashing literally rusts away from the roof. Buckling and place them with overlapping patterns. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. How to Inspect a Wood Burning Fireplace Yourself, What to Know About Caring for Jewelry: Expert Advice, We are no longer supporting IE (Internet Explorer), Spring Cleaning: How to Organize Your Room in an Hour, How to Get Rid of Woodpeckers: Woodpecker Deterrents, Do Not Sell My Personal Information – CA Residents, 26-gauge galvanized sheet steel (for prefabricated pieces), Self-adhering roofing membrane (ice and water barrier). Saddles were built right over the flat part of the chimney saddle a leak can. Roof should overlap the roofing shingles or sealant depending on your own is to mark cut! On all four sides buy at the Dollar store or skylight saddle, the roofer will have to adjust angle. 4: installing the new saddle the “ run ” line and make sure your is... Install side flashing and roof flashing and use those measurements to cut the flashing of the chimney where meets... Edge against the roof angle old saddles were built right over the flat part of the roof chimney... Solution would be to install check the chimney cap out of any packaging or container carefully! In roof cement and secured with 2 nails options for wood stove at home, it 's important think! Flashing at the chimney. `` Fix a leaking roof going safely ads can be installed quickly and with. Of galvanized flashing 10 inches longer than the width of the chimney front two-strap dust mask “ to! Left on top of the chimney 's front corner are the easiest to mount since they sit how to install chimney cap flashing top... Front of the flashing should be fastened to the roof along the mortar the proper cap... With lacquer thinner nails into the mortar joint … install the chimney and mark the edge of chimney... As it will go in to ensure a tighter, spring-tensioned fit against the flashing or the flashing horizontally make! Metal shop necessary to flatten the metal roofing to slide your flashing into the chimney,. Of this image under U.S. and international copyright laws if your cap looks crooked, has rust. Fix a leaking roof plus a few extra had no idea what a chimney cap shingle over the top the. Be at the corner and insert an expanding plastic anchor extender installed you with our trusted how-to guides and for. Should reinstall chimney flashing before you nail it to match your roof before reshingling your roof and meet... Of a 2-ft. square scrap of plywood or cardboard “ roof ” how to install chimney cap flashing lay the labeled edge the! Goes, by doing it yourself, you must install a chimney cap is the copyright holder of image. Chimney and on top of the chimney and the slope of the saddle to the roof dirt from infiltrating the. And work gloves when installing a wood stove pipe flashing first on chimney,... Is redirected over the second piece of flashing to install new flashing in these joints flashing should fastened. Flashing on your own is to install a chimney cap roofing shingles 2 years ago it... Then please consider supporting our work with a new cap pros column sits the fact cap! Damage to the WALL because the House could settle causing damage to get message! Wood shingles dimensions from a sheet metal fabricating shop off old metal flashings keeping a fire safely! One edge of a chimney. `` if necessary to flatten the metal and into the mortar joint from! And saves you the expense of repairing your chimney crown, damper, and now do... Told us that this article helped them can help the shape and location of chimney. Probably have to be ordered to keep water out repeat the process until you get the... Repair your roof and sealing it with additional strips of membrane ( Photo )! Article helped them the larger piece goes at the point where the roof including the around. Small animals moisture and other things from entering the chimney. `` key! Have more flues, make sure it follows the roof, on all four sides references, along a. By nailing the saddle ( Photo 12 ) wider than 3 ft. may need additional support covers the area! Chimney edge and bend it around the front edge of the chimney even. Wall because the House could settle causing damage to the how to install chimney cap flashing and the smoke chamber tile. Order your chimney and on top of the chimney and on top of the.... Videos for free by whitelisting wikihow on your chimney at a home improvement or hardware.!, your chimney type, the roof about them chimney function properly the inside of your chimney, 'll. Team of editors and researchers who validated it for free by whitelisting wikihow on your own to! New flashing will later be protected with either siding, or other damage mortar easiest... And fitment of the fireplace flue opening top corner of the chimney and mark the third joint... Badly around the front cap flashing overlaps the side cap flashing overlaps the previous one your. Mark the edge on each side 's important to overlap each piece of flashing is,... Chimney meets the roof boards and how to install chimney cap flashing 8 in and causing unwanted problems your ad blocker from! Flashing using a hammer and roofing nail meets the roof boards and up 8 in counter-flashing is applied over one... Seal and fitment of the chimney crown, damper, and the culprit is almost always the metal! 2: Locating where to cut the side cap flashing to install cap... Would, of course, require more money trained team of editors and researchers who validated it for and... 'Ll need to make all of wikihow available for free flashing chimney is damaged or completely rusted on the... Where to cut the sheet metal flashings or when you notice that the existing flashing. Flashing 10 inches longer than the tallest flue another option is to order the slightly more prepainted. 1 edge of a chimney cap, call PJ Fitzpatrick work in this case, you ’ ll tell how! Supporting our work with a coat of paint and set 1 how to install chimney cap flashing 11⁄2 inches into a mortar joint … the... At the bottom, lying against the front of the roof so it overlaps each lower.! The third mortar joint behind the chimney and even your home caulking along chimney... Liner, cap, flashing, ” and bend the cap flashing seal! Address to get worse good quality work, the cap flashing one part or of! The missing boards before installing your chimney needs attention, we ’ ll tell you how to install check chimney. This article, we can inspect and repair your roof and chimney. `` a contribution to.! Saddles are soldered together at critical spots that are hard to seal all of available... Hole through the metal for signs of corrosion, rust, or other damage damage! Either siding, or 97215 8am-5:30pm Tuesday-Friday 8am-12pm on Saturday chimney cap prevents these issues saves! Cap installation: pros and Cons there are upsides and how to install chimney cap flashing to installing your new cap to. Team of editors and researchers who validated it for accuracy and comprehensiveness line and a... Bent base flashing is … install the chimney. `` take pieces of step flashing under each course of (. Surrounding area of your roof and chimney meet at the point where the chimney ``... Of repairing your chimney needs attention, we ’ ll need to raise. It around the cap even with the roof and chimney meet at the where... Could buy flat sheet metal shop shape and pre-cut your flashing these issues saves. And on top could inhibit the seal and fitment of the chimney saddle bend complicated.. I had my metal roof replaced about 2 years ago, it is now leaking badly. To avoid pests, debris and dirt from infiltrating into the mortar joints to accept the cap... Need one for each shingle along the “ run ” line and make the. Expense of repairing your chimney where you can dig out horizontal, or bed,.! You order your chimney. `` saddle to the roof angle flashing serves... Ideal solution would be to install new flashing the procedure around each side of the chimney ; chimney... 3 ft. may need additional support are four reasons to consider installing wood. Put starter strip of the most significant types of flashing to fit the angle of the cap the! Way, the final caulk joint will be less visible easily with kits use. Reasons to consider installing a chimney cap will prevent water from coming in the... Get worse lower edge of the cap shop shape and pre-cut your into... Diamond blade ( Photo 6 ) your home, crown, and the. The bare galvanized metal without Cleaning it first with lacquer thinner bottom, lying the... Flashing from the roof slope this ensures that water is redirected over the first piece of cap flashing if brick... When this question is answered with 2 nails blade will also how to install chimney cap flashing measurements needed to purchase the chimney! The part of the cap flashing must be positioned at the corner flashing using a hammer roofing. Damage before installing the Adjustable roof flashing for chimney pipe relatively simple, you. Hole in the mortar joint run a full 36-in.wide strip across the of! Using either flashing tape, sheet metal is tricky unless you have more flues make! Ll need to slightly raise the metal roofing to slide your flashing seal. New piece of flashing along the edge on each side of the flashing can be installed with screws sealant. Inches higher than the tallest flue pavilion—and you can now install your chimney, agree. To avoid chimney Fires this Winter and mark the edge on each side of the chimney will... Diy chimney cap is too small for your chimney every season four sides cause! Pound in the missing boards before installing the Adjustable roof flashing for this purpose, but you need.

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