How To Install Roof Underlayment

Minimum overlap guidelines are set by the.

How to install roof underlayment.

Start the roof felt at one bottom corner of the roof. Step 4 rolling the underlayment. Back roll method cut the membrane into 10 to 15 foot lengths and re roll loosely. Put on your protective eye wear and work boots before you begin.

Overhang the roof rake edge 1 5 and cover the underlayment with a metal rake edge trim. Press the membrane of the self adhering roofing underlayment in place with. Step 2 preparing the roof. 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.

How to install roofing underlayment. This provides two plies across the entire roof with three plies at the headlap. 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. Use a chalkline or align it by eye to make sure it is straight then drive roofing nails every foot or so to fasten it to the sheathing.

Step 5. Cut drip edge flashing at an angle at the corner press it lightly against the eave end not too hard or you will misshape it and drive a nail near the end. Be careful moving up and down the ladder. Step 1 safety.

The standard approach for two ply roofing underlayment is to lap a 36 inch roll by 19 inches. Peel back 1 to 2 feet of release liner align membrane. The lap is half the width of the roll plus one extra inch for headlap. Step 3 preparing the underlayment.

Peel the release liner from the membrane. 4 lay the membrane on the roof with the plastic. Install drip edge at the roof eave edges. Apply drip edge to the eave.