How To Install Underlayment On Roof

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.

Add approximately 4 inches to that measurement. Overhang the roof rake edge 1 5 and cover the underlayment with a metal rake edge trim. Install drip edge at the roof eave edges. Back roll method cut the membrane into 10 to 15 foot lengths and re roll loosely.

Press the membrane of the self adhering roofing underlayment in place with. Measure horizontally along the edge of the lowest point of the roof which is usually just above where gutters are located. Put on your protective eye wear and work boots before you begin. Be careful moving up and down the ladder.

Tack it in place at the corner with the end flush with the end of the roof and the bottom edge of the roll right along the bottom of the roof deck over the drip edge. Roll out about 10 feet of. Peel back 1 to 2 feet of release liner align membrane. Step 3 preparing the underlayment.

Peel the release liner from the membrane. Step 4 rolling the underlayment. The standard approach for two ply roofing underlayment is to lap a 36 inch roll by 19 inches. How to install roofing underlayment.

Synthetic roofing underlayment is to be laid horizontally parallel to eave with printed anti slip side up starting at the bottom of the lowest roof eave with a 1 5 underlayment overhang at the eave covering the pre installed eave drip edge. Minimum overlap guidelines are set by the. 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. Step 1 safety.

Step 2 preparing the roof. Step 5.