Residential Roof Assembly Detail

Unvented roof assemblies such as conditioned attics and unvented cathedral ceilings are becoming common in north american construction.

Residential roof assembly detail.

The international codes i codes are the widely accepted comprehensive set of model codes used in the us and abroad to help ensure the engineering of safe sustainable affordable and resilient structures. A composite decking made of solid materials it resembles real wood and particularly strong and stable for bearing heavy load. Tpo s long term heat uv and natural fungal resistance plus flexibility without need for plasticizers also make tpo a reliable low slope roofing system. Heat welded seams provide superior strength.

Two layers are preferable to one layer due to increase in air flow resistance. R 46 unvented roof assembly two layers of r 6 5 inch rigid insulation yielding a total combined thickness of 2 5 inches. Short for thermoplastic polyolefin tpo is a single ply roofing membrane that offers excellent performance at a cost effective price. A horizontal timber or metal resting at the peak of the roof the rafters and trusses are connected to the ridge board for a cohesive framework.

Cad details document name pdf dwg download all cad construction details 37 1 mb 3 4 mb mc01 identification of roof areas 694 kb 167 kb mc01a single layer underlayment 678 kb 302 kb mc01b double layer underlayment 711 kb 322 kb mc02 vent pipe flashing 626 kb 349 kb mc03 valley. Roof drains from zurn include combination primary overflow control flow dual outlet siphonic retrofit and more which cater from educational to commercial needs. Roof decks shall be covered with approved roof coverings secured to the building or structure in accordance with the provisions of this chapter. The international code council icc is a non profit organization dedicated to developing model codes and standards used in the design build and compliance process.

Download free high quality cad drawings blocks and details of roof and deck insulation organized by masterformat. Section r806 4 of the 2009 international residential code irc and section r806 5 of the 2012 irc have requirements for unvented conditioned attic assemblies. There is no potential for condensation until interior moisture levels exceed 45 rh at 70 f during the coldest month. These assemblies are created by eliminating ventilation openings and moving the thermal moisture and air control boundaries to the plane of the roof deck.

Roof assemblies shall be designed and installed in accordance with this code and the approved manufacturer s instructions such that the roof assembly shall serve to protect the building or structure.