Maximum Roof Pitch For Sip Panel

Based upon the inclined panel length.

Maximum roof pitch for sip panel.

For the metal roofing it s a not brainer. We ll strap it and create an air space but we ve never done a torch down on sips. 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. Deflection criteria is l 240 minimum for roof loads at 3 in 12 pitch or greater.

Deflection caused by 1 8 1 4 variations in height is purely an aesthetic concern and will not compromise the performance of the metal roof panel. Can you offer some advice. 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. Sip load design charts are for total load dead toad live load.

Matt melton lives in central washington state in a 3 year old house with a roof made of structural insulated panels sips that are 12 1 4 inches thick. Sips should be designed to comply with the deflection limits of the applicable building code. Metal roof slope is expressed by a ratio indicating the roof pitch which notes the vertical rise of the roof in inches for every 12 inches the roof runs horizontally in other words dividing the vertical rise and its horizontal span. Specifying a cold roof or simply over sheathing the roof.

Variations in panel height can cause deflection in the roofing material that may be visible from the exterior of the home. For long term deflection under sustained load creep additional deflection must be evaluated. The profile refers to the shape the metal sheets take when they bend to form panels. Several assemblies that prevent shingle ridging are described in the builder s guide to structural insulated panels sips.