how to extreme

Install Corrugated Roofing

Construction How-To, Outdoor Living, Roofing July 14, 2015 Sonia


 

 

 

 

 

 

 

 

How to Install Corrugated Roofing

By Matt Weber

Corrugated roofing panels are made of metal, fiberglass or polycarbonate and typically install over a system of purlins. They’re popular for workshops, sheds, boathouses and other outbuildings due to their long-lasting durability and easy installation. The panels come in standard widths and lengths and are fastened using screws with flexible washers.

Material Advantage

The EHT staff chose the metal version of the panels in basic black to roof a boathouse last summer. Depending on the roofing product, a metal roof can last 40 years or more. Metal roofing easily sheds snow and ice and doesn’t absorb water. It won’t rot, split or crack, and can’t be damaged by termites and pests. And, unlike any other type of roofing, the color of pre-painted metal roofing can be changed to match new exterior color schemes. In fact, repainting will lengthen the overall life of the roof while eliminating the cost of replacement.

One trick to separating panels from a bundle is to "whip" the panel to force air beneath it (so they don't stick together).

One trick to separating panels from a bundle is to “whip” the panel to force air beneath it (so they don’t stick together).

The light weight of a corrugated metal panel is another advantage. Compared to asphalt shingles that weigh an average of 2.5 lbs. per square foot, metal roofing panels only weigh .7 to 1.3 pounds per square foot, which allows the panels to be installed over existing roofing materials. This saves costly disposal and removal charges, and makes the panels easier to lift and install. (Ultimately, local building codes and the condition of your roof’s substructure will determine if you can install metal panels over your existing roof.)

On this construction crew, one man delivers the panels to the two installers on the roof.

On this construction crew, one man delivers the panels to the two installers on the roof.

Metal roofing can reflect as much as 70 percent of the sun’s radiant energy. This minimizes heat retention so less heat is transferred into the building.

Fasten the panels with a 2” overhang.

Fasten the panels with a 2” overhang.

Plus, metal roofing is the preferred roofing choice in hail-prone areas. Hail causes conventional roofing materials to break and split. Hail will not penetrate a metal roof.

Safety

In general, fall-restraint harnesses and safety lines should be used by anyone working on roof. It’s also smart to wear goggles when cutting, and gloves when installing or handling the sheets to prevent cuts from the metal. Wear flexible rubber shoes that grip the metal when stepping on it. Never install metal roofing in the rain, because the slick, wet surface of the panels can virtually guarantee you’ll slip and fall. And never work with metal panels in high winds, because the wind can carry an unfastened panel airborne, in which case it becomes a large flying blade and very dangerous.