Overlapping Corrugated Roof Sheets

Learn how much to overlap the corrugated sheeting.

Overlapping corrugated roof sheets.

A cat ladder or roof board should always be used when working on a roof for safety of the person and to avoid damage to the roofing material. Installing corrugated metal roofing will require you to lap the m. Use special roofing fasteners rather than standard screws to secure the corrugated sheets as they have a waterproof seal underneath the head that prevents leaks. 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.

Whether you re working with tin roofing sheets performing corrugated roof sheeting installation or handling a different metal material working with metal means an increased probability of being cut especially when working with power tools. These notes are intended to cover the use and installation of corrugated roof sheets such as pvc other plastics and bitumen fibre sheets. Strong winds can separate the overlapping edges of the panels and allow the roof to leak. Secure the sheets into place with screws.

Wear thick gloves when working with the metal roofing sheets and keep safety goggles on at all times. How to overlap corrugated metal roofing. Once the first sheet is in place you need to install the remainder of the lowest row of corrugated metal roofing. Important due to the nature of the overlap detail we would highly recommend the use of butyl sealant when using brit tile sheets.

This helps to prevent water infiltration. When joining panels you should use silicone sealant along their vertical length and overlap the sheets by one corrugation. End laps 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 valleys of sheets should be turned down at lower ends and turned up at upper ends.

A basic rule of thumb for installing metal roofing is that the piece of roofing higher up on the slope should always overlap the one below it. It is usual to allow roof sheets to overlap into gutters by about 50 mm. Installation of corrugated roof sheeting. Next pre drill holes on the end and side ridges of the panels spacing the holes 6 to 8 inches apart.

To install corrugated roofing start by cutting your panels to length with an angle grinder. Fixing leaks in a corrugated metal roof starts with locating the source of the leaks.