Fixing Corrugated Metal Roofing Sheets

Crest fixing and side lapping.

Fixing corrugated metal roofing sheets.

The general advice for fixing is 4 5 screws across the sheets purlin we advise using 1 screw on the overlap of the next sheet. To avoid moisture entering laps by water action metal sheets are slightly modified to manage this problem. Corrugated roof sheets. Usually fixed in the 2nd 5th and 8th corrugation on the 8 3 and 2nd 6th and 10th corrugation on the 10 3 to have a symmetrical appearance and a strong holding into the purlins.

Here i show you how easy it is to re roof a shed with onduline roofing. One downside is that the metal sheets have a susceptibility to denting both in installation and during hailstorms. Buy plastic metal corrugated sheets at toolstation. Multiply the two measurements together to get the total area of the roof.

Also each sheet overlaps the next as it is laid horizontally and by 2 inches vertically. We recommend the use of our self drilling tek screws with 5 16 hexagon heads and 19mm sealing washers for fixing your roof. Corrugated roofing sheets should be installed into the corrugated sheets crown using a 65mm tek screw with baz washer. The overlaps ends and sides depends upon the sloop of the roof.

Metal roofing resists rot is not susceptible to insect damage and is non combustible a boon in fire prone areas. Corrugated sheet roofing material is widely available and easy to use. Fixing and securing sheets. Sheets must be properly affixed according to the type of sheeting you re using.

Corrugated sheet roofing. The main fixings are used to transfer all the loads acting on the cladding back to the supporting structure and to form a watertight seal. Under the head is a 19mm stainless steel washer with a bonded neoprene pad that compresses to create a seal with the roof sheet. We stock corrapol stormproof bitumen more.

As with all of the fixing screws provided you can use a colour cap to hide the stainless steel head. When purchasing the pvc corrugated sheets remember that the sheets need to overhang the verge of the roof by 2 inches. Measure the length and width of the roof by using a tape measure. Corrugations should run in a straight line between the highest and lowest points and at a right angle to the purlins the intermediate supports.

Fixing screws are highly recommended to screw through the castle of the sheet as shown. When i built my garden shed in 1987 i used onduline corrugated roofing following the. The screws can be fitted through the trough or pan sections of a sheet s profile or if fixing corrugated sheets through the crest of the sheet s profile using a longer screw and a soft baz washer.