Rigid Top Roof Sheathing

Tiles were designed so that lugs or short protrusions on the top backside of each tile would hook over the step sheathing. Remove existing roofing and non adhered underlayment to expose roof sheathing. With three layers of 11 2 in.

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The glue i was using didn t set fast enough to hold the rigid foam panels in place so i ended up installing the foam and osb sheathing at the same time.

Rigid top roof sheathing.

We live in zone 5 suburb of chicago and are hopefully about to put rigid foam above the roof sheathing on just the northeast roof portion of our roof. Then a second layer of plywood sheathing and asphalt shingles following the steps explained in this article. Only thing is it was windy that day. Benefits of rigid foam on top of sheathing.

4 of polyiso under 4 of eps all above the original roof sheathing. Apply continuous air control membrane to existing roof sheathing or implement continuous air control at roof sheathing. Polyisocyanurate insulation above the sheathing and approximately 91 4 in. Installing the rigid foam and top layer of roof sheathing.

Install rigid insulation board in multiple layers with joints offset vertically and horizontally between adjacent layers. The illustration shows two layers of osb or plywood roof sheathing. Many homes in more urban areas or other places with dense populations are opting for this method because they can better optimize space. Of cellulose insulation in the rafter cavities the roof shown here has an r value of approximately 63.

My original plan was to install the layer of rigid foam first and then do the sheathing on top. Installing rigid foam insulation on top of roof sheathing is a great option for commercial buildings and homes with limited space. Deck for a thick roof rigid foam insulation installed above the roof assembly can create an energy smart roof. More recently however most roofers recommend solid sheathing on the roof to give the house additional resistance to movement or shear strength.

A lower layer conventionally nailed to the rafters and an upper layer installed as a nailing surface for the roofing material on top of the rigid foam. Installed on the roof exterior foam makes the living space below more comfortable and reduces the likelihood of ice dams.

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