How To Overlap Corrugated Roofing Sheets

Corrugated sheet roofing material is widely available and easy to use.

How to overlap corrugated roofing sheets.

Purlin spacing should suit the end laps required for the size of sheet to be used. Also each sheet overlaps the next as it is laid horizontally and by 2 inches vertically. Fit the first sheet. The valleys of sheets should be turned down at lower ends and turned up at upper ends.

Divide the length of the roof by this number to determine the number of rows of sheeting you will need. First measure the length of the ridge of the roof. 1 x research source the fastest option. Sweep the metal roofing sheets of all dirt and debris with a push broom.

The overlaps ends and sides depends upon the sloop of the roof see below. 2 lay 6 inch wide butyl tape over all horizontally lapping end seams. Corrugated roofing is a great way to top a garden shed shop or patio. Measure the length and width of the roof by using a tape measure.

The average metal sheet for corrugated metal roofing has a width of forty four inches. When purchasing the pvc corrugated sheets remember that the sheets need to overhang the verge of the roof by 2 inches. Corrugations should run in a straight line between the highest and lowest points and at a right angle to the purlins the intermediate supports. You only need some basic tools and materials.

Multiply the two measurements together to get the total area of the roof. Lay the remainder of the row. Install the roofing screws vertically along each rib in the panel. For maximum weather tightness start laying sheets from the end of the building that will be in the lee of the worst anticipated or prevailing weather.

When the panel is laying flat on a surface the side that touches flat is the underlap side. It s quick easy low cost and you can do it yourself. Secure the screws but do not overtighten. If end laps are required you should allow 300mm minimum overlap sealed with butyl sealant tape 10mm from the edge of each overlapping sheet as well as in the middle of the overlap.

The opposite end the overlap side will be elevated slightly above the surface. Wear hearing and eye protection. Measure it in inches from the left to the right and write down this measurement. Continue onto the next rows.

Be sure the larger edge is laid so that the small edge of the next panel will overlap it. Any end laps must be supported by a suitable purlin. Place the first screw about 7 inches from the bottom and each subsequent screw about 18 to 24 inches apart along the vertical run. Position the tape with the release backing on the top.

When laying the metal panels on the roof the overlap ridge of the new panel should straddle the underlap ridge of the panel before it. How to install corrugated metal roofing. Measure the length of the.