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.

2 layers roll roofing.

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. When the two layers are pressed together they form a seal. Install the first strip upside down. There are some advantages to roofing over existing shingles says dale richards owner of richards roofing in troy michigan.

The strips should always be horizontal. Nail along one edge first spacing nails inch in from the edge and 6 inches apart. So anywhere along the gable end that you can see the felt you ll see two layers. Then nail the opposite edge.

Richards also estimates that the homeowner saves at least 1 000 in costs associated with removing and properly disposing of the existing shingles. How to install roll roofing on low slope roofs. Apply roofing cement and secure the second layer to the roof. Check the sheathing for any nails or screws that may be.

For many years it was acceptable to put even the third layer. As mentioned above place the first 6 inches 15 cm of the second layer on top of the first layer. 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. Get your trowel and another scoop of cement and apply it on the roof below the second chalk line.

Owens corning deckseal sa sbs cap 39 375 ft w x 32 833 ft l 100 sq ft shasta white roll roofing. As it is rolled out the roofing professional will use a torch to heat the bottom of the cap to the top of the base sheet. The homeowner will have two layers of shingles protecting the roof and the home is less likely to have ice dams he says. Steep sloped roof products such as tile slate metal and shakes only allow one layer.

Attach drip edge along the edge of the roof with roofing cement. For extra durability you may install roll roofing in two layers. Once the cement is spread across the roof it s time to place the second layer down. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing.

The top membrane sheet to a torch down roofing system is a smooth cap sheet. Asphalt shingles typically can have one more layer added over the top two roofs total. Extend the front edge of the drip edge so it runs off the roof and into the. The first course starts with an extra 1 2 wide run.

Otherwise the safest minimum pitch for rolled roofing is 2 inches of decline per 12 inches of horizontal direction 2 12 pitch. In a two layer torch down roof the system is complete at this point.