Some roofers prefer to attach felt underlayment with 1 inch roofing nails or special nails with plastic washers but most codes allow staples which are easier to drive.
How to install underlayment on roof.
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If necessary adjust how the material ls aligned to keep it hanging over the decking material.
It starts with installing solid decking usually plywood or oriented.
Install a layer of roofing insulation as recommended by the roofing manufacturer.
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Hammer down any large nails that are exposed by the removal.
Step 5 nailing the underlayment.
Installing a roof is much more than just nailing shingles onto some boards.
In roof areas where roof planes meet to form valleys which naturally channel high water flow in wet weather and other roof penetrations such as skylights plumbing vents roof to wall intersections are also important roof areas that can benefit from peel and stick membrane underlayment installation.
Start from the top of the roof and remove the old shingles along with the flashing underlayment and vents.
Inspect the underlying roof sheathing for damage and make any needed repairs.
Using your staple gun secure the felt to the roof.
How to install felt underlayment for a new roof.
Now it s time to install the underlayment and flashing.
These pieces act as a weather proofing and protective barrier between your house and the elements helping keep water and cold temperatures out.
Start by laying asphalt felt or other underlayment over the roof.
Install the underlayment along the roof decking.
Before applying roofing you ll need to cover the sheathing with roofing felt also often called tar paper most local codes call for using 30 pound felt.
Smooth out the underlay to prevent any bumps.
Here is a video about roofing underlayment.
Install drip edge at the roof eave edges.
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