How Much Should I Overlap Corrugated Roofing

Overlapping anti condensation lined sheets.

How much should i overlap corrugated roofing.

Corrugated sheet roofing corrugated sheet roofing material is widely available and easy to use. Learn how much to overlap the corrugated sheeting. Any end laps must be supported by a suitable purlin. Corrugations should run in a straight line between the highest and lowest points and at a right angle to the purlins the intermediate supports.

The light weight of a corrugated metal panel is another advantage. 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. Metal is usually installed on rafters or strip sheathing rather than the solid decking used under other materials. When framing the roof the spacing for roof trusses should not exceed 24 inches 61 cm and purlins should not exceed 36 inches 91 cm apart.

The product must be overlapped at the sides not less than 1 5 corrugations. The installation of metal roofing involves placing large metal panels on the roof. Once the first sheet is in place you need to install the remainder of the lowest row of corrugated metal roofing. Measure the length and width of the roof by using a tape measure.

How to overlap corrugated metal roofing. It is generally considered good practice to use fasteners along side laps however when cladding is supported as indicated in maximum support spacings side lap fasteners are not usually needed for strength. The panels overlap allowing water to flow from one panel to the next without being able to penetrate the area under the roofing panel. Also each sheet overlaps the next as it is laid horizontally and by 2 inches vertically.

Secure the sheets into place with screws. Multiply the two measurements together to get the total area of the roof. The overlaps ends and sides depends upon the sloop of the roof see below. As a first line of defense against water damage it is important that the metal roof overlap be implemented correctly.

Installing corrugated metal roofing will require you to lap the m. Compared to asphalt shingles that weigh an average of 2 5 lbs. Some slight overhang is recommended in conjunction with a drip edge flashing to prevent water from getting under the roofing and onto underlying wood. The sheets should overlap by at least four inches add a bead of caulk where they overlap and at the other end of the building ensure there s an overhang of two inches.

You can use both types of corrugated roofing together creating panels that will allow light to come through as with a clear or white fiberglass corrugated panel known as a skylight.