Metal Roof Over Sips

I would suggest allowing this to vent in some way the metal directly over the sips roof even with ice and water will get extremely hot.

Metal roof over sips.

Ensure that panel joints are level to one another as variations in panel height can cause deflection in the roofing material. 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 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. Several assemblies that prevent shingle ridging are described in the builder s guide to structural insulated panels sips.

There is a guy in nh that places pex tubing in the space between the strapping and uses this for solar hot water collection. Sip panels must be air and watertight. The roof structure is 10 25 sips on a 2 12 pitch and the developers are going with either metal roofing or a torch down system. The moisture is very obvious at the seams an appears to have leaked through from the inside of the home.

We ll strap it and create an air space but we ve never done a torch down on sips. Chris the metal roof went on top of the sips with triflex between. Make certain to tape seal all panel joints. Specifying a cold roof or simply over sheathing the roof with an additional layer of osb staggered over the panel joints will eliminate the possibility of shingle ridging.

Here are some important considerations.