Fitting Onduline Roof Sheets

Up signs indicate the direction of the ridge to lay the sheets correctly.

Fitting onduline roof sheets.

Lay sheets in the opposite direction to the prevailing winds. 3 screws at first intermediate purlin of the sheet. Onduline roofing is often the first material of choice by enthusiasts and professionals due to its weatherproof qualities a properly fitted sheet is expected to last for fifteen years. Onduline hr sheets only require a very simple toolkit to install.

Thanks to their reduced weight 4 kg m and their great mechanical flexibility onduline hr sheets can be installed on an extremely diverse range of lightweight roof structures. 14 screws should be drilled per sheet. Onduline sheet shall be supported by purlins with maximum width distance of 45 cm. Insulation can also be easily incorporated too providing ventilation is provided below the onduline sheet design advice should be sought from the manufacturer of the insulation products in this case.

Minimum recommended roof pitches for onduline roofing sheets are 15. This is particularly importantant on buildings with high humidity levels. Covering of roofs can be hazardous. The roofing sheets are composed of a single layer of organic fibres melded with bitumen through an intensive pressure and heat process giving the final product a highly durable finish.

5 screws at each corrugation at the end overlap or eaves. A simple and flexible roofing system.