Installing Roll Roofing Underlayment

Clean the roof with a broom to remove any debris.

Installing roll roofing underlayment.

Peel back 1 to 2 feet of release liner align membrane. Attach drip edge along the edge of the roof with roofing cement. Roll out the underlay and tack it down making sure that it is flat and smooth not buckled or wrinkled anywhere. Check the sheathing for any nails or screws that may be.

Cut the membrane into 10 to 15 foot lengths and re roll loosely. You will need 1 10 gallon of lap not mastic cement for every roll and 2 pounds of roofing nails for every square. It works well for backyard storage shed roofing applications. Peel the release liner from the membrane.

The roofing should overhang the eaves by inch except where you install drip edge flashing on top of the roofing along the rake edge. Extend the front edge of the drip edge so it runs off the roof and into the. 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. 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.