render board

Installing a thin coat render system onto a render board is easy to do once the boards are in place. Render boards create a nice flat surface for the render to be applied to, so in this respect, it’s very easy to get a perfect finish. We’ve put together a shopping list of materials that you will need to complete to the job, so keep reading for the full breakdown of products.

1. Priming the substrate:

Skip the primer – render carrier board is designed for renders to be applied directly onto it, so a primer is not necessary for this particular substrate.

2. Applying the Beading:

Beading is essential for reinforcing external areas that are more prone to damage, for example, the corners and the areas around windows and doors. The required beads will depend on the property and which particular areas need reinforcing. We have a broad range of render beads that should be selected and applied as necessary, our beads are uPVC and are designed to be embedded within the basecoat layer.

3. Applying the Basecoat:

For applying render onto a render board, we recommend using the EWI-225 Premium Basecoat. This is our strongest and most durable basecoat, offering a high level of adhesion. Because render carrier boards are a less sturdy substrate than for example solid brick, we always recommend the use of the EWI-225. This should be applied at a thickness no greater than 6mm.

Coverage rates:

1x25kg bag covers 4.5m2

Drying times:

24-48 hours

4. Embedding the Mesh:

Fibreglass Mesh is embedded within the basecoat for extra reinforcement. This will ensure the system remains crack resistant.

Coverage rates:

1x50m2 roll covers 42.5m2 when overlapped

5. Priming the Basecoat:

If you are using a dark coloured render, then you may want to use a render primer. This can be tinted to match the colour of the render, and it will also help to increase the adhesion of the render to the basecoat. The type of primer will depend on the type of render you are using. For a Silicone Silicate system, we recommend using the SiSi Render Primer.


1x7L bucket covers 20m2

1x21L bucket covers 60-70m2

Drying times:

12-24 hours

6. Applying the Render Topcoat:

Once the primer is dry, the render topcoat can be applied. We recommend using either the Silicone Silicate Render or the Silicone Render. These are thin coat renders, so they’re ideal for use on a range of different render carrier boards. Silicone-based thin coat renders are also self-cleaning, which means that they are great for maintaining a clean facade for years to come. Render boards are often used for bigger jobs, so choosing a low-maintenance render will keep the building looking nice for longer.


1.0mm grain size: 1x25kg bucket covers c. 10m2

1.5mm grain size: 1x25kg bucket covers c. 7-10m2

Drying times:

24 hours (+)

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