Installation and Fitters

Cutting, Fixing and Layout

The benefit of Cedral Weatherboard (Formerly Marley Eternit Cedral) is its ease of installation. All boards and trims are provided finished so all you have to do is cut and fix the boards onsite.

Fabrication Recommendations:

Installation always begins at the bottom of the structure by fixing a start profile. The first plank is placed over the start profile beginning the shiplap style. We recommend you allow at least 150mm between the ground and the first Cedral Weatherboard panel. This spacing acts as a splash guard between the ground and first panel to protect against surface water or dirt entering the structure.

When planning how you want to install your weatherboard try and visualise the finished result. You can either cut the planks all the same length or cut them to different lengths to achieve a staggered look.

For further installation information and diagrams please refer to the Cedral downloadable guide.

Joint Detail The joint detail shows how to
break up the design by staggering
different plank lengths to achieve
this effect
Shiplap Detail

Getting Started and Equipment Needed:

Cutting – There are several cutting methods which can be used when installing weatherboard. These methods are dependent on the amount of planks being cut.

Handsaw - Best method for cutting a small amount of planks (suggested 1-10 planks)

Guillotine - Weatherboard can be cut with a specialist guillotine. Please ask one of our Cedral experts about this as weatherboard specific guillotines can be supplied and delivered with your purchase.

Hand held circular saw - Best for moderate amounts of cutting. For this method, we urge you to cut from the back of the board as the saw can leave teeth marks if cut from the front.

Diamond-Dusted Blade - This hand held circular saw gives the best results for cutting a large amount of boards.

Scoring/Breaking the Board - Scoring and breaking of the planks can be done if using corner profiles or against brickwork. Scoring of the plank can be done with a Stanley knife and then broken over a hard edge.

Screwing vs. Nailing – Whether you’re using screws or nails to install the planks, makes no difference, the important thing to remember is the size of the screw or nail you’re intending to use. See below details on recommended sizes.

Screwing – Screws can be used without pre-drilling a hole as long as a 50mm distance is left between the screw point and the edge of the board. If a less than 50mm distance is required when fitting, we recommend pre-drilling the hole to suit the screw size.

Nailing -

By Hand - As long as the nail is at least 50mm from the end of the plank, no pre-drilling is required. Nails should be stainless steel ring shank and a minimum size 2.8 x 45mm with 7mm head.

Pneumatic Nailing - There are a large variety of guns available on the market but we recommend using a gun with adjustable settings. If using a gun, the nail must be 50mm and be 2.8mm in diameter. A stainless steel ring shank nail is suggested with a 7mm diameter full round head.


Need Help Fitting your Cedral Weatherboards?

We can help. Not only can we provide the cladding and accessories but we are also able to help you find the appropriate fitters for the project. We are able to supply the contact details of cost-effective, reliable fitters no matter where you’re based in the UK. You would then enter into a separate agreement between the fitting contractor and yourselves. We also offer site assistance and advice for Cedral Weatherboards or any of our other external cladding products. We’ll help with the drawings, estimating and recommendations of the best material for your project. For more information, get in touch.