Warm Roof Soffit Detail

Modern timber roofs are mostly framed with pairs of common rafters or prefabricated wooden trusses fastened together with truss connector plates timber framed and historic buildings may be framed with principal rafters or timber roof trusses roofs are also designated as warm or cold roof depending on how they are designed and built with regard to thermal building insulation and ventilation.

Warm roof soffit detail.

Its top edge is tucked up under the shingles and its outside face is where the gutter is mounted. Warm deck roof a warm deck roof is where the insulation is placed on top of the rafters joists and the roof covering is then placed over the insulation. 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. The object being to design out the possibility of warm moisture laden air coming into contact with a cold surface and condensing.

Cold deck roof a cold deck roof is where the insulation is placed between the joists rafters or in. However soffit can still be seen when you re close to the home and when you re underneath it or at street level. All the roof edges are eaves no gable ends so flat soffits continue around corners. No ventilation is required for these types of roofs.

Fascia and soffits finish the edges of roofs by covering the ends of the roof rafters or roof trusses where they overhang the sides of the house the fascia is the wide board that s installed on edge and runs horizontally along the edge of the roof. Fit soffit around corners by installing back to back j channel or miter divider to handle the splice. Soffit is the exposed siding underneath your roof s overhang. Additional construction details drawings.

In an earlier video you showed how to seal and insulate behind the fascia of a warm roof so that you avoid condensation on the fascia and even more importantly avoid cold air circulating between a warm roof and the ceiling below which can completely defeat the aim of a warm roof. So far so good. As well as the small selection of roof detail drawings shown here many of the building notes have a related construction detail drawing with specific dimensions eg rafter sizes spans insulations types for purchase with the building specifications.