Low Pitch Roof Construction Details

Then apply standard asphalt shingles over the membrane.

Low pitch roof construction details.

Mansard roofs can help create a great deal of extra living space. Some times ago we have collected galleries for your need look at the picture these are awesome galleries. For a low slope residential roof there are two main options. That includes soldered metal roofing or synthetic membranes.

You must click the picture to see the large or full size photo. Regular asphalt shingles and standard skylights will work at pitches of 4 12 or greater but at lower pitches you have to use different materials. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. If you like and want to share you must click like share button maybe you can help.

We like them maybe you were too. By low slope roofing we mean any roof that is pitched at less than 4 inches of rise in 12 inches of run or 4 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. Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs.

Detailing a low pitch eaves the lower the roof pitch the more difficult it becomes to construct an effective eaves system particularly where roofspace ventilation is required. The membrane will outlast the shingles and seal around all nail penetrations. A mansard roof also known as a french roof is a four sided roof with a double slope on each side that meet forming a low pitched roof. The sides can either be flat or curved depending on the style.

These panels generally come with a painted mill finish or a clear acrylic finish. The basic cold roof construction consists of rafters set at up to 600mm centres underlay laid horizontally over the rafters with a slight drape between each rafter and tile battens nailed directly through the underlay into the rafters. A low slope roof design typically has a pitch of between 2 12 and 4 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.

The lower slope is much steeper than the upper. Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak. 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. Perhaps the following data that we have add as well you need.

But the taller profiles like standing seam and pbr shown below can be installed on roofs with as low as 1 4 or 1 2 in 12 pitch.