Roof Sheathing Type

Made up of multiple layers of wood strands compressed at odd angles to each other and bound.

Roof sheathing type.

Wall sheathing is primarily a structural material. Roof sheathing may also be constructed of plywood. Required sheathing thickness for roofing important factors. The most common materials for this are oriented strand board osb or plywood both.

Zip system sheathing and tape provides a water resistant durable underlayment for many finished roof coverings including metal tile and asphalt shingles fiberglass shingles and cedar shingles. Several factors must be considered when determining appropriate roof sheathing thickness such as the. Plywood is a bit more expensive than osb but is usually stronger. There are two main types of wall sheathing.

Planks wood boards plywood osb oriented strand board decks. This type of roof sheathing is used under wood shingles and shakes which usually require ventilation on both sides of the roofing material. Wood structural panels when designed to be permanently exposed in outdoor applications shall be of an exterior exposure durability. Oriented strand board osb.

Sheathing type typically 15 32 inch or thicker panels are required in high wind areas. Wood structural panel roof sheathing exposed to the underside shall be permitted to be of interior type bonded with exterior glue identified as exposure 1. It also holds roofing nails. It is attached to the exterior wall framing and prevents walls from swaying or bending.

Oriented strand board osb is one of the most popular materials for roof sheathing. They must be covered with some type of sheathing or decking before most finishing roof materials can be applied. Roof sheathing materials plywood. While structural sheathing increases building stability non structural sheathing improves insulation.

Osb is lightweight cheap and strong enough to resist bending or breaking should someone be walking on the roof. Roof sheathing is commonly made from materials such as. Use panels rated as exposure 1 or better. Oriented strand board osb or plywood can be used although plywood will provide higher nail head pull through resistance.

Open sheathing may also be chosen for economic reasons but only if used with roofing systems such as metal or tile which have the structural capacity to span between sheathing boards.