Call Our Friendly Team Today On 01902 229412
Call Our Friendly Team Today On 01902 229412

CORRUGATED PROFILE INSTALLATION GUIDE

Corrugated sheeting can be laid either left to right or right to left. Due to having a fully symmetrical profile turning the sheet isn’t required, but when fitting the sheeting you will have to overlap one corrugation minimum, more is okay to do also. This will help prevent any water capillary and you will still get the full 990mm cover. We recommend laying away from the common prevailing wind to help prevent wind whistling and water capillary.

Fixing screws (45mm minimum) are recommended to screw through the peak of the sheet (as shown). Usually fixed in the 2nd, 6th, 9th and 13th corrugation to have a symmetrical appearance and a strong holding into the purlins. Then use 22mm stitchers in the 1st and 14th corrugation. Fixing in every purlin if possible but every two is adequate on short purlin spacings.

Corrugated Profile Installation
Image shown is for illustration purposes only

We recommend using a maximum purlin spacing of 750mm for 0.5mm and 1250mm for 0.7mm, but not going any more than 1000mm for 0.5mm and 1500mm for 0.7mm unless it’s necessary.

Stitching the sheeting overlaps are very important (as shown). Stitching the overlapping peaks every 500mm is adequate but if you can fix anything up to 750mm if necessary. This will help prevent water capillary seeping underneath the sheet. Also applying silicone to the join will help decrease this even further.

If rooflights are being used, they operate in the same way as the steel sheeting. But clear silicone must be applied all the way around the sheet when being fitted to create a watertight seal.

Ridge and Barge flashings are always fitted after the sheeting. Again, using the stitching screw to fix through the flashing into the castle of the sheeting. Once this process is complete then fitting a foam infill between at the ridge end and the eaves end is recommended to help prevent birds / vermin entering the structure at the same time stopping wind pushing anything through during poor weather conditions. (Please note we DO NOT recommend using foam infills if you have our Drip stop membrane system installed to your sheeting due to the roof requiring ventilation for the Drip stop to work at its optimum).

If the sheeting or flashings need cutting / trimming, you can use a ‘Nibbler Attachment’ due to the clean precision cut it can offer. Angle grinders are commonly used but this will not offer a clean cut. A Nibbler will be the most sufficient tool for this.