Installing Roll Roofing Underlayment

Peel the release liner from the membrane.

Installing roll roofing underlayment.

Clean the roof with a broom to remove any debris. While it is not necessary to install an underlay with roll roofing it is inexpensive and adds a layer of protection that makes it worthwhile. Peel back 1 to 2 feet of release liner align membrane. Roll out the underlay and tack it down making sure that it is flat and smooth not buckled or wrinkled anywhere.

Cut the membrane into 10 to 15 foot lengths and re roll loosely. It works well for backyard storage shed roofing applications. You will need 1 10 gallon of lap not mastic cement for every roll and 2 pounds of roofing nails for every square. How to install roll roofing on low slope roofs.

It is required as an underlayment for most low slope asphalt roofing applicaions and also works well for low slope shed roofs without any additional roofing on top of it. Press the membrane of the self adhering roofing underlayment in place with heavy hand pressure to ensure the desired adhesion to the roof deck. Check the sheathing for any nails or screws that may be. Attach drip edge along the edge of the roof with roofing cement.

The roofing should overhang the eaves by inch except where you install drip edge flashing on top of the roofing along the rake edge.