2 Layers Of Roof Rafters

Posted july 31 2018 by onpage marie.

2 layers of roof rafters. If the old roof has slate clay cement asbestos tile or wood shakes the installer must remove the material. Get some other roofing companies minimum of 2 to inspect the roof and give you an assessment of the roof deck shingle condition and estimate to replace the roof deck shingles. That means the roof doesn t shed water as easily as steeper roofs which is why choosing the right type of roofing material is so important. If you have done some serious research on roofing then you have probably heard about adding a second layer of shingles on top of the old ones.

The tops of inclined rafters are fastened to the ridge. A roof is one of the most vital components of a house. Asphalt shingles typically can have one more layer added over the top two roofs total. If the existing roof foundation is inadequate for the new roof or has two or more layers the rules prohibit the installation of a new roofing system.

For rafters spaced 20 or more inches apart 1 2 or 5 8 inch plywood is recommended. The most common rafter spacing is 24 inches and 5 8 inch plywood is recommended for that. Pros and cons of adding a second layer of shingles. They are inclined members spaced from 16 to 48 inches apart.

When framing a roof figure 7 2 carpenters must be familiar with commonly used roofing terms figures 7 3 and 7 4. Replacing a roof can be very expensive and exhausting at the same time. A 2 12 roof slope means your roof has 2 inches of vertical drop for every 12 inches of horizontal distance. They vary in size depending on length and spacing.

To shed water away from the eave most roofers add a metal drip edge right to the roof deck covering it with the membrane. When you cut the rafters you ll need to make 3 separate cuts. On most flat roofs such as epdm tpo or modified it is perfectly acceptable to two layers of roofing. This synthetic layer which replaces felt paper covers the entire roof deck and is the second line of defense against leaks after the shingles.

For many years it was acceptable to put even the third layer. Rafters rafters make up the main framework of all roofs. Simply put it s a shallow roof.