If you’re planning to install flashing to an existing roof there are a few factors you’ll have to consider. The first is to make sure your roof’s in great repair and there aren’t leaks. Once you’ve established that the roofing is in excellent condition it’s time to measure the area where you’ll install the flashing. Once you’ve measured the area, you’ll have to cut the flashing according to the size and then attach it with screws or nails.
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Take a look at the area to be flashed
Measuring the area to be flashed is a crucial first step in the process to install flashing onto an old roof. It is important to know the dimensions of the space to be flashed in order that you are able to purchase the right quantity of flashing material. Additionally taking measurements of the space will provide a better understanding of the structure of your roof and how the flashing will need to be installed.
Cut flashings to the size you need
Start with cutting your flashing down to size. In the case of a pre-formed pan, you’ll just need to cut it long enough to extend 6 inches beyond the edge of the roof. In the case of roll roofing, cut the flashing twice as long as the length that the roofing. Then, cut the flashing horizontally in half to create two pieces that are the same length as the roof’s width.
Remove any old shingles and nails
To install flashing on an existing roof, first, you’ll have to remove any old nails and shingles. Once you’ve done that then you can put in your new flashing. Make sure to overlap the flashing with minimum 2 inches and then use corrosion-resistant nails or screws to hold it in place.
Secure flashing onto the roof
If your home has an existing roof, you’ll need to be careful when installing flashing. First, remove any shingles and other materials which might be in the way. When the roof is clean then you’ll have take measurements and then cut your flashing to fit. Make sure you leave plenty of an overlap to ensure that the flashing can be securely fixed onto the roofing. After the flashing is set, you can put up the new shingles or other roofing materials.
Nail flashing that is in the right place
1. Check that the surface is clean and free of debris.
2. Take a measurement of the area to be covered and cut the flashing to the desired size.
3. Apply a generous amount of adhesive on the reverse of the flashing.
4. Apply the flashing and then hold it for a few minutes in order to allow the adhesive to be set.
5. Nail the flashing in place with roofing nails.
6. Apply a thin layer of sealant around the perimeter of the flashing, ensuring that it is sealed it in position.
Cover the seams using roofing cement
Once you’ve cut the strips of flashing to length, spread them out on the roof, so they cover the roof’s joints material by minimum 2 inches. Once you have the flashing placed, apply a continuous bead of roofing cement to the underside of the overlap. Use a putty knife for smoothing the cement, and then take off any excess.
Apply caulk all over the flashing
To install flashing on an existing roof, you’ll need to apply caulk around the flashing. Begin by removing any old caulk and debris out of the location. Then, apply a large amount of caulk to underside of the flashing. Be sure to smooth it out so that it’s even and level. Finally apply the flashing in position and seal it with more caulk.
Install additional shingles if necessary.
If you are installing flashing on an already existing roofing structure, then you may require the installation of additional shingles to provide an adequate surface for flashing to adhere to. Start by removing any damaged or missing shingles, then put the new shingles in the appropriate spot. Be sure to cover the shingles in order that the flashing will be completely fully covered.
If you’re thinking of installing flashing on your existing roof, there are a few points to keep in mind. First, make sure you have the right tools and materials. Second, take your time and be careful not to damage your roof. Thirdly, if you’re not sure what you’re doing it’s best to employ an expert. With a bit of planning and care it is possible to install flashing on your roof and ensure that your home is in good condition for the years to come.