2 Layers Roll Roofing

The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says.

2 layers roll roofing.

If your roof pitch declines up to 1 inch vertically for every 12 inches horizontally 1 12 pitch it is a good candidate for rolled roofing as long as you use the concealed nail method of fastening. Attach drip edge along the edge of the roof with roofing cement. In a two layer torch down roof the system is complete at this point. It also helps if you first install a layer of roofing felt.

Valleys will be open so flash them before hand with metal or two layers of roll roofing the first an 18 inch wide strip and the second 36 inches wide. Then nail the opposite edge. For many years it was acceptable to put even the third layer. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.

Steep sloped roof products such as tile slate metal and shakes only allow one layer. The top membrane sheet to a torch down roofing system is a smooth cap sheet. When the two layers are pressed together they form a seal. Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles.

Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch. Check the sheathing for any nails or screws that may be. Asphalt shingles typically can have one more layer added over the top two roofs total. Get your trowel and another scoop of cement and apply it on the roof below the second chalk line.

Install the first strip upside down. Once the cement is spread across the roof it s time to place the second layer down. So anywhere along the gable end that you can see the felt you ll see two layers. Extend the front edge of the drip edge so it runs off the roof and into the.

Assuming your roofing contractor is using standard 36 wide 15 roofing felt double coverage means that each layer of felt put down across the roof laps 19 over the upper half of the previous course. The strips should always be horizontal. To install roll roofing you ll need to cut the material into long strips of the correct length for your roof and lay it flat. Clean the roof with a broom to remove any debris.

The first course starts with an extra 1 2 wide run. Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing. How to install roll roofing on low slope roofs. There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan.

For extra durability you may install roll roofing in two layers. Apply roofing cement and secure the second layer to the roof.