Breathaplasta Universal can be applied directly to hempcrete. Universal is a fast setting, bio-based, breathable plaster. It's easy to use and sets within an hour.

Equipment required

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

Recommended plaster thickness

Up to 50mm total thickness.

Coverage per 20kg Universal bag

Approx. 5 square metres at 4mm thickness

Setting time per coat

Approximately 45-60 minutes.

Surface preparation

Dub out the wall to fill and level any hollows or depressions. Wall should be flat and even prior to plastering.

Mist the hempcrete surface with clean water approx. 2-3 times in the 10-15 mins before plastering to help control suction.

Recommended plaster application

  1. Mix Universal to approx. 10 litres of clean water per 20kg bag of dry powder used.

  2. Mix the plaster using a paddle mix for approx. 3 minutes.

  3. Base coat of Universal approx. 8-10mm. This coat should be sprayed or cast on (thrown) to improve bond between plaster and substrate.

  4. Second coat approx. 8-10mm. Apply by trowel using firm and even pressure.

  5. Finishing coat approx. 2-3mm of Universal or Smooth.

  6. Mist the surface of the finished plaster lightly and evenly across the whole surface, to help ensure the plaster cures well.

Bag calculator

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

Bags required:

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