Metal Roof On Plywood

Do you need plywood under metal roofing.

Metal roof on plywood.

Considering when to. Remove all unused vents pipes and protrusions. Inspect the plywood for damaged areas. Metal roofing roofing answers roofing installation roofing materials 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.

Add purlins on top of this for venting and drainage then add horizontal purlins to mount the metal roof to. How to install metal roofing over plywood inspect your plywood. The asphalt in the felt paper is waterproof and does a great job of protecting the. Most metal roofs will also require underlayment as well as a slip sheet.

In a barn shop or other outbuilding you can attach your metal roof directly to the purlins. Repair any rotted sections of plywood before installing the metal panels. Do i need the plywood base. Most metal roof companies recommend installing felt paper on roof sheathing before you install the metal roofing.

Applying the underlayment and the slip sheet. Align the first metal roofing panel so that it overlaps the edging by 1 2 to 3 4 of an inch and is square to the roof. How to apply metal roofing over plywood step 1. Place the first screw.

It needs to be replaced due to leaks and one contractor the one i d really like to hire refuses to put the new metal roof on just purlins. In reading online it seems wise to install a vapor barrier over the plywood to prevent condensation from getting adsorbed into the plywood from the steel roof. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Install the roofing screws vertically along each rib in the panel.

Selecting the right underlayments for a lifetime metal roof should be a primary concern for anyone thinking about specifying or choosing to install a metal roof on their home. But it seems the condensation will affect the 2x4 strapping. Since your subroof will be waterproof well drained and airtight this will be a cost effective solution to build your roof saving the cost of plywood. I have an existing steel roof presently just on purlins.

April 3 2017 filed under. After the original roofing is removed what you will want to do first is look for bad pieces of. He won t do it unless i put on plywood as a base he also recommended ice and water underlayment. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

Use the reinforced solitex mento plus roof underlayment on top of your rafters.