Low Pitch Roof Construction Details

A low slope roof design typically has a pitch of between 2 12 and 4 12.

Low pitch roof construction details.

Just like any other roofing system low slope roof designs will have several effects on the overall construction of the building including the interior volume the style and design of the house the drainage system and the material used for covering. 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. 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. You must click the picture to see the large or full size photo.

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. May you like low pitch roof house plans. 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. We like them maybe you were too.

Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak. The membrane will outlast the shingles and seal around all nail penetrations. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. 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. For a low slope residential roof there are two main options. 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. Then apply standard asphalt shingles over the membrane.

Self adhesive flashing membrane under the shingles prevents leakage on low slope roofs. Perhaps the following data that we have add as well you need. Another approach is to build a cupola or ventilated doghouse in the middle of the low slope roof an approach championed by joe lstiburek. The sides can either be flat or curved depending on the style.

If you like and want to share you must click like share button maybe you can help. 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. These panels generally come with a painted mill finish or a clear acrylic finish. 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.

Mansard roofs can help create a great deal of extra living space.