How To Apply A Metal Roof Over Osb

A homeowner recently wrote and asked me the following regarding osb roof decking.

How to apply a metal roof over osb.

In order to avoid a hump at the transition from two layers of materials to one the notation on the building plans advises to lower the roof purlins in these areas by 7 16. Install the first metal panel on the low end of the roof square to the eave. An affordable option and easier to lay than shingles tin is the most commonly used type of metal roofing. Work toward the ridge.

Although you can install corrugated metal roofing over shingles for the best foundation it is recommended that all the old roofing be removed. In the case above the shear forces in the last 12 foot bay at each end of the roof have had osb placed between the roof purlins and the steel roofing. Secure the metal panel to the deck by drilling 1 1 2 inch galvanized metal screws through the peak of the rib in 12 inch to 16 inch intervals. The good news is that there are many different solutions in terms of installing metal roofing panels including tin aluminum and steel.

Osb is widely used as roof decking material. Whether you are looking to install a metal roof on a shed or a house it s important to know the difference in the various types of metal roofs available. 3 install 1 4 purlins down over the shingles before installing the metal roof the third way to install a metal roof over shingles is by applying 1 4 purlins over the shingle roof. As long as the plywood under the shingle roof is in good condition this way can provide many benefits.

Case in point one of our recent clients in colorado has hired a building contractor to erect his building. Begin on the left side of the roof working to the right. 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. This is by far the most common way to install a metal roof.

In many cases it makes sense to remove an old or dilapidated roof and install a metal roof that is better able to withstand the elements. Work at a comfortable steady pace trying not to rip up or carry off too much old roofing at once. Overlap the edge of the roof by 1 inch.