Metal Roof Over Sips

I did this on a house similar to what you are describing.

Metal roof over sips.

Several assemblies that prevent shingle ridging are described in the builder s guide to structural insulated panels sips. I have a new structure with 12 1 4 structural insulated panel roof at a 2 12 pitch. Fasten metal roof panel directly through accepted self sealing roof underlayment it is important that the. The ridges caused by the expansion of sip roof panels may be an aesthetic blemish but it does not affect the performance of the roofing or the sip roof panels.

The low pitch is due to code which requires me to retain the snow load there is no attic space to ventilate and the roofing must be. Build for the future with extreme s structural insulated panels sips the high thermal values and strength properties of extreme s sips are highly beneficial for roof construction. This will ensure ventilation of moisture build up through vented ridge assembly. Specifying a cold roof or simply over sheathing the roof.

Extreme s pre insulated sips offer an option for a high performance roof framing solution that is 15 times tighter than conventional construction practices making it easier to control indoor air environment. When the house was built melton sealed the seams between roof panels with tape applied on the bottom of the panels. June 21 2009 filed under. Roger lin s washington d c house will have a roof of 12 inch thick structural insulated panels sips.

He s uncertain about the details. Cold roofs help protect the sip osb from. He has already installed roofing underlayment over the panels. The pitch of the roof is very low only 1 2 inch in 12 and the metal roofing has been applied directly over the sips with no air channel beneath the roofing for ventilation.

Icf wall sip s roof but this house had to have red cedar shingles over the sips s deed restriction i covered the entire roof with the ice and water shield to protect it until the shingle or in your case metal will be installed. The top of the sip gets a type of roof tar applied over the joints. Bottom interior side of the sip roof is properly air sealed and if one properly installs a peel stick membrane on the sip roof and then install a metal roof on top i don t see why one would have any issues and necessitate a cold roof design. I would cover the entire roof with ice and water shield as someone else suggested.

Misc roofing answers roofing installation. But lin wants to add 2 inches of rigid foam on top of the panels to reduce thermal bridging.