Low Pitch Porch Roof Solutions

If there are hip or valley conditions use a vertical rib panel it provides the most flexibility during and after installation on low slope metal roofs.

Low pitch porch roof solutions.

For a low slope residential roof there are two main options. 1 cover the entire surface with a self adhesive flashing membrane such as grace ice water shield there are many equivalent products. This apparently was to stop water from blowing or backing up into the vent and inside the home from the low pitch side. For the smaller residential low slope roofing applications such as garage and porch transitions certainteed offers an excellent solution in our flintlastic sa self adhering sbs modified bitumen roofing system.

Built up roofing is the most popular roofing material used on low sloped roofs. It s constructed of a durable reinforcing mat of non woven glass fibers that have been coated and permeated to a thickness of approximately 2 0 mm. Because of limited space between the roof sheathing and ceiling joists a low slope shed roof can be difficult to insulate properly. If there are valleys on a low slope metal roof they should be dropped below the plane of the roof.

Made of several layers of bitumen surfaces built up roofing is finished by applying an aggregate layer or coating as the top layer. Then apply standard asphalt shingles over the membrane. A roof vent is installed with the membrane roof side blocked. The low pitch roof meets at the peak with an approx 8 12 pitch roof.

However you can only use this pitch with built up roofing or specialized synthetic roofing. In this energy smart homes article senior editor martin holladay explains how to insulate a vented low slope shed roof using a combination of intake vents and cupolas. The minimum pitch for a roof is 1 4 12 which translates to 1 4 inch rise to 12 inches of run. This top layer normally is tar over which the gravel is laid.

The membrane will outlast the shingles and seal around all nail penetrations. Their fasteners are either concealed or screwed at the top of a ridge which makes them less likely to leak. 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.