Every roofing system is comprised of multiple parts, the base of which is the roof decking.

Decking is a critical structural component that roofing companies rely on to support the external roofing materials and keep the entire installation structurally sound.

Though this component is rarely seen as it is hidden below layers of other materials, roofers must carefully install and inspect the decking to ensure a strong and durable roofing installation.

What Is Roof Decking?

Decking is the first layer of materials installed by a roofer when putting on a new roof.

It is the supportive surface onto which roofing companies attach exterior materials like shingles, tiles, and metal panels, which make up the part of a roof installation that can be seen.

Decking is nailed onto the rafters, connecting each one as a part of the overall roofing system.

It adds structural integrity to the entire roof while providing a flat and secure surface onto which the exterior materials can be affixed.

What Is Roof Decking Made From?

Most commonly, roofing companies install decking made from thick plywood, which is economical while also being strong.

Roofers can also install plywood decking for budget-minded homeowners, but it is less recommended, as it is less moisture-resistant than plywood.

Another popular choice is oriented strand board (OSB) decking, which some contractors recommend in humid climates, as it is made from layers of laminated wood fibers and strands that can be somewhat more moisture-resistant than plywood.

For homes with no attics and exposed interiors, roof companies may also use tongue-and-groove boards or plank sheathing, which looks more attractive from the inside of the home.

How Can Decking Affect A Roofing Installation?

Since decking has such an important role, a roofer must do a tight and strong decking installation, apply a durable underlayment layer over it, and then follow that up with the correct installation of the roofing materials.

Then the roof should be regularly inspected and well-maintained, as moisture seeping through to the decking can cause it to start to rot.

Over time, small leaks and other hidden water damage can destroy the decking and rafters to the point that areas of the roof can collapse.

Decking that is not properly attached can also be blown off by strong winds.

Must Roofers Replace Roof Decking Every New Installation?

New decking can add some expense to a new roof installation, but it is not always necessary for a roof company to replace the decking with every installation.

An experienced roofer can inspect the existing decking once all of the old roofing materials have been stripped off, then assess its condition for re-use and even make minor repairs.

Decking that is aged, delaminating, or showing other signs of damage will be removed and replaced with new wood to ensure a structurally sound installation.

Talk To A Respected Local Roofer About Roof Decking

The decking installed by a roofing company is an important structural component that allows the rafters, trusses, and external roofing materials to perform as a single cohesive system.

Hire an experienced local roofing company that can properly install new decking when needed and make sure it stays in great condition for a strong and protective roof!