Roof Structure Thickness

07 60 00 flashing and sheet metal and 07 62 10 copper flashing.

Roof structure thickness.

It is also important to factor in the type and lifetime of the roof membrane that will be used. Roof sheathing comes in grid marked 4 by 8 foot sheets and should be installed perpendicular to the frame. Sheathing should be a minimum of 19 32 inch thick. The roof s structure the sheating and the shingles all add to the thickness.

That s considered to be the minimum. As a general rule roofs that have a high human occupancy rate should be framed with rafters every 16 structures such as sheds or barns can be frames with rafters every 24 again make sure to consult local codes. 07 41 13 structural 07 61 14 00 20 steel standing seam roofing 07 61 15 00 20 aluminum standing seam roofing 07 41 13 16 copper roof system flashing and sheet metal. Intensive to describe green roofs that are thick enough.

Comstock comstock getty images the roof of the house must be structurally sound to support the weight of the shingles. The structural engineer must factor in the weight of completely saturated soil since the plantings and the soil will hold a significant amount of water. This is especially true of intensive green roofs which can have soil that is two feet deep or more. This minimum will only work if the rafters are set 16 inches apart at most and if the roof doesn t have too much load.

The nominal thickness of a green roof is the approximate total height of the soil and drainage components that constitute the green roof system excluding the roof structure insulation waterproofing and plants. Unlike with plywood siding the plywood sheet to be used for sheathing should be at least 3 8 inch thick. It is common practice to use the term extensive to describe green roofs that are very thin and will only support hardy drought resistant vegetation such as sedums herbs and perennials. The problem with metal roofing gauge is that there is a wide range of tolerances.

The typical thickness range for sheathing is 3 8 to 3 4 inch.