If you’re planning to install flashing to an existing roof there are a few factors you’ll have to think about. First, you’ll want to ensure that the roof is in good repair and there aren’t leaks. Once you’ve established that your roof’s in great condition then you’ll have to determine the area in which you’ll be installing the flashing. Once you’ve measured the area, you’ll need to cut the flashing to size and then put it in place using nails or screws.
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Measure the area to be flashed
Measuring the area to be flashed is a crucial first step to install flashing onto an old roof. It is essential to determine the dimensions of the space to be flashed, so that you can purchase the appropriate quantity of flashing material. Also taking measurements of the area will give you a better understanding of the roof structure and how the flashing will have to be put in.
Cut flashings to the size you need
Begin with cutting your flashing down to size. When you’re working with a pan that’s already formed then you’ll need to cut it long enough to extend 6 inches beyond the roof’s edge. In the case of roll roofing you’ll need to cut it twice as long as the width that the roofing. Then, cut the flashing in half vertically so that you’ll have two pieces that are the same length as the width of the roof.
Remove any old shingles and nails
To install flashing on an existing roof you’ll first need to remove the old shingles and nails. Once you’ve done that, you can install the new flashing. Make sure that you overlap the flashing with minimum 2 inches and then use corrosion-resistant nails or screws to secure it into the right place.
Make sure that flashing is secured to the roof
If your house has an roofing system that is in place, you’ll need to take special care for installing the flashing. It’s the first thing to do is eliminate any shingles or other materials that might be in the way. When the roof is clean, you’ll need to measure and cut the flashing in order to make it fit. Make sure you leave plenty of an overlap to ensure that the flashing can be securely fixed onto the roofing. Once the flashing is in place, you can put up the new shingles or other types of roofing material.
Nail flashing that is in place
1. Make sure the surface is free of debris.
2. Find the area that needs to be covered, then cut the flashing to the desired size.
3. Apply a good amount of adhesive on the back of the flashing.
4. Place the flashing in place and keep it in place for a few minutes in order to let the adhesive set.
5. Nail the flashing in place with roofing nails.
6. Apply a small amount of sealant around the perimeter of the flashing, ensuring that it is sealed it in place.
Cover the seams using roofing cement
After you have cut the strips of flashing to the desired length, lay them on the roof, so that they are overlapping the joints in the roofing material by minimum 2 inches. Once you have the flashing placed, apply a continuous bead of roofing cement on the bottom of the overlap. Use a putty knife to smooth out the cement and remove any excess.
Apply caulk around the flashing
For installing the flashing onto an already-existing roof it is necessary to apply caulk on the flashing. Start by cleaning any old caulk or debris off the surface. Then, apply a large amount of caulk to the side of the flashing that is below it. Be sure to smooth it so that it’s even and level. After that press the flashing into place and seal it with more caulk.
Install additional shingles if necessary.
If you are installing flashing on an existing roof, you may need to install additional shingles to create an even surface for the flashing to stick to. Begin by removing any damaged or loose shingles. Then, put the new shingles in place. Be sure to overlap the shingles to ensure that the flashing will be completely protected.
If you’re thinking about installing flashing on your existing roof, there are a few things to be aware of. First, ensure that you’re using the correct tools and materials. Also, be patient and make sure you don’t harm your roof. If you’re unsure of what you’re doing it’s best to engage a professional. With just a little planning and care it is possible to install flashing on your roof to keep your home in great condition for the years to be.