Flat Roof Sheathing Material

Comes in standard 4 by 8 foot sheets is strong durable and relatively light.

Flat roof sheathing material. Roof sheathing may also be constructed of plywood. By shala munroe installing sheathing on a flat roof is much easier than working on a peaked roof. Once you have the area you can divide by the area of a sheet of plywood to find the number of sheets needed. Typical types of wood used for roof sheathing are oriented strand board known as osb and plywood the most popular being osb.

Sheets of 7 16 inch thick with no edge support can be used in an area where the snow load is 30 pounds per square foot. Roof sheathing materials plywood. The common grade of plywood for roof sheathing is cdx. The sheathing is the base you lay over the rafters that holds the roofing felt and shingles.

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. Zip system panels install fast and stay flat for a roof that looks as good as it performs. A half inch cdx plywood is often used with rafter with 24 inch spacing. A 4 8 sheet of plywood is 32 ft 2.

Pvc single ply membrane arguably the most popular of all flat roofing materials some contractors even install only pvc membranes for higher end residential installations pvc membranes are a single layer of thermoplastic material. Osb is lightweight cheap and strong enough to resist bending or breaking should someone be walking on the roof. Pvc roofs are especially strong and durable featuring a minimum breaking point of 300 pounds per inch compared to the industry recommended 200 ppi. This flat roofing material is popular because it uses trusted weatherproofing materials asphalt reinforced with polymers.

Oriented strand board osb is one of the most popular materials for roof sheathing. This is a popular option because it presents homeowners with functional but affordable roof sheathing. And if you re still wondering what roof sheathing is and what materials are typically used read on and satisfy your curiosity. That will suffice on a roof with rafters set 16 inches apart with minimal roof loads.

It also holds roofing nails well. With edge support and the same snow load 3 8 inch osb can be used. Plywood is a bit more expensive than osb but is usually stronger. There are generally 5 to 6 different routes to take regarding the materials needed for roofing a flat surface.

Loads will vary with the pitch of the roof. Most roofs will be sheathed in plywood at least 3 8 inch thick. It has the advantage of multiple layers but needs fewer layers than built up roofing and is less messy to apply. If your roof carries a heavier load like if there s less pitch and or it snows in your area a roofer may recommend the use of the inch variety.