Is Particle Board Used On Roofs

There are soft spots in the flat roof.

Is particle board used on roofs.

Oriented strand board commonly referred to as osb is a type of engineered lumber similar to particle board formed by adding adhesives and then compressing layers of wood strands. Although oriented stranded board osb has similar uses to plywood it has a much coarser finish. Wood veneer particle boards are very extensively used in this industry. Like particle board and mdf osb comes from wood shavings.

We form the layers by shredding wood and then joining them together with adhesive. Osb is widely used as roof decking material. Treated lumber is often used as the main material with thin sheets of treated particle board being placed on top and then shingles are attached. Particle board in modern homes is required to be visibly marked as astm type 2 m w.

If not of a type approved for use as roof sheathing particle board strength and stability when exposed to moisture is significantly lower than that of plywood or oriented strand board osb more commonly used for this application. Uses of particle board in commercial industry. This is especially common on a low slope roof. Particle board comes in several thicknesses which make it a versatile enough product to be used in roofing.

A homeowner recently wrote and asked me the following regarding osb roof decking. It has this particle board for the roof my dad the smartest man i have ever known said particle board is actually illegal but it was alot cheaper so he did the shed with particle board inside of plywood.