Low Slope Roof Eave Detail

Many local building codes require ice and water shield and national building code states ice and water shield must start at the roofs eave edge and extend 2 ft inside heated wall space of a structure.

Low slope roof eave detail.

Low slope roofs are not totally flat their roof slope generally ranges from 1 4 12 to 3 12. Low slope structural roofing generally used on roof pitches ranging from 12 to 3 12 consists of interlocking panels commonly called standing seam roofing that run vertically along the roof surface. If the upper edge of a low slope shed roof intersects a vertical wall the most logical approach in my opinion is to detail the roof as an unvented roof. Steep to low slope transitions need membrane that runs 12 14 inches up the steep roof.

Then apply standard asphalt shingles over the membrane. Lay a starter strip apx. The membrane will outlast the shingles and seal around all nail penetrations. Typically large footprint single story warehouses and pre engineered metal buildings will utilize low slope metal roof systems.

Ice and water grace extending onto the fascia a couple to a few inches. For a low slope residential roof there are two main options. Low slope metal roofs require less material which reduces the overall load on the building s structure. These panels generally come with a painted mill finish or a clear acrylic finish.

Lay the base sheet down and lap onto the fascia. Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs. Minimum metal roof slope depends on the roof profile building design climate and site location. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products.

Of the same modified product usually torchdown even with the edge of the roof. Available in 12 16 and 18 widths tite loc and tite loc plus panels can be produced in 22 and 24 gauge steel or 032 and 040 aluminum. Page 15 ventilation details ventilation guidelines download pdf page 16 ventilation details ridge vents low slope 6 12 or less steep slope 8 12 or greater severe climate areas tips download pdf page 17 specialty roof deck details wood deck tips download pdf page 18 specialty roof deck details rigid insulation. Roofing ice and water shield is a critically component to any new roofing system especially in cold weather climates.

Or run the epdm membrane up the roof and keep shingles off the bottom portion. The panels have been designed for application over a wide variety of substrates on roof slopes as low as 1 2 12 pitch. Another approach is to build a cupola or ventilated doghouse in the middle of the low slope roof an approach championed by joe lstiburek. Finding the right products for your low slope roof.

Residential low slope roofing can generally be divided up into two broad categories.