Breathaplasta Universal is an ideal companion product for wood fibre boards as these insulation panels are excellent carriers for lime plasters. Universal is a fast-setting, multi-purpose, hemp lime plaster designed for rapid build-up onto a wide range of backgrounds.

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Equipment required

Breathaplasta Universal
Clean water and brush or mister
Hawk, trowel and plastering tools
Fibreglass mesh

Recommended plaster thickness

8mm total thickness (2 x 4mm coats)

Coverage per 18kg Universal bag

Approx. 5 square metres at 4mm thickness

Setting time per coat

Approximately 45-60 minutes

Surface preparation

Brush the surface of the wood fibre boards with clean water prior to plaster application to control suction.

Apply a fibreglass render mesh of approx. 5mm x 5mm into the base coat before it sets. Ensure the mesh is fully encapsulated within the base coat. Mesh should overlap by 100mm at all joints.

Recommended plaster application

  1. Mix Universal to approx. 8 litres of cool, clean water per 18kg bag of dry powder used.

  2. Mix the plaster using a paddle mix for at least 2 mins. Leave the mix to stand for 2 mins, then mix again for 1 min.

  3. Base coat of Universal at 4mm (sufficient to cover washers/fixings).

  4. Fibreglass render mesh applied to base coat while it's still fresh - flatten in using trowel immediately after applying plaster.

  5. Top coat of Universal at 4mm.

  6. For a smooth finish with Universal, moisten top coat using a fine mist spray bottle to help trowel to a smooth finish. Optionally, achieve an even smoother finish by applying a 2mm skim coat of Smooth.

Bag calculator

Use this calculator to work out how many bags of Universal to order for your job.

Bags required:

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