Metal Roof On Plywood

Do you need plywood under metal roofing.

Metal roof on plywood.

After the original roofing is removed what you will want to do first is look for bad pieces of. 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. Applying the underlayment and the slip sheet. He won t do it unless i put on plywood as a base he also recommended ice and water underlayment.

Most metal roofs will also require underlayment as well as a slip sheet. Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Use the reinforced solitex mento plus roof underlayment on top of your rafters. Remove all unused vents pipes and protrusions.

In a barn shop or other outbuilding you can attach your metal roof directly to the purlins. 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. Repair any rotted sections of plywood before installing the metal panels. Place the first screw.

I was planning on putting plywood over the rafters and cross the rafters with a 2 x4 every 16 to secure the metal roof to. Considering when to. Most metal roof companies recommend installing felt paper on roof sheathing before you install the metal roofing. 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.

The asphalt in the felt paper is waterproof and does a great job of protecting the. But it seems the condensation will affect the 2x4 strapping. Sweep the plywood clean of all dirt and debris with a push broom. Do i need the plywood base.

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 install metal roofing over plywood inspect your plywood. I have an existing steel roof presently just on purlins. The quality and type of underlayments used on the project in the long term will affect the overall performance of the roof.

Inspect the plywood for damaged areas. How to apply metal roofing over plywood step 1. 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. For many applications a layer of plywood underneath your metal roofing is an unnecessary expense.

Install the roofing screws vertically along each rib in the panel.