2 Layers Of Roof Sheathing

Water shield is the next roofing layer that creates a water proof barrier where ice or water can buildup near the roof eaves.

2 layers of roof sheathing.

It got nailed over 2 x 12 joists 24 o c. Comes in standard 4 by 8 foot sheets is strong. So anywhere along the gable end that you can see the felt you ll see two layers. Should you sandwich roof sheathing between two impermeable layers.

Wood shakes minimum 3 4 sheathing wood shakes nail type minimum length. On a 2 12 pitch roof. Plywood used for roof decking is typically called sheathing and carries a grade stamp indicating its load and span ratings and other performance factors. Plywood is layers of wood.

And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. Dimensional comp shingles over 3 tab 1 1 4 1 1 2 1 1 2 1 1 2 more than 1 layer of roofing not recommended over 3 8 sheathing. Skinning over old sheathing does occur but i have never seen someone skin over plywood in that condition. 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.

I am replacing a roof right now built in 1982 and the 3 ply is delaminated pretty heavily. Roof deck is the roofing material that sits on top of the roof trusses. Poor ventilation from a past roof along with 3 ply equals that delamination. Most roof decking is made from sheets of plywood.

Based on the pictures alone i don t know what to say. Can you double up plywood roof sheathing without inviting disaster 2000 sf of 1 2 cdx ply went on the roof before i had a chance to take a look at it and it is really sorry stuff. It s up to you. It s usually a peel and stick product that adheres directly to the roof deck.

Nailing new shingles over existing ones is less expensive and faster requiring less labor but it also means you lose the chance to assess the sheathing for signs of water damage. I m not a fan of spray foam. Roof sheathing materials plywood. The first course starts with an extra 1 2 wide run.