Equipment required
Breathaplasta Smooth, clean water, primer
Hawk, trowel and plastering tools
Recommended plaster thickness
Approx. 2mm total thickness
Coverage per 20kg Smooth bag
Approx. 12 square metres at 2mm thickness
Setting time per coat
Approx. 45-60 mins in warm, dry conditions, or 90-120 mins in cold, damp conditions
Surface preparation
Ensure the existing plaster surface is in reasonable condition, is well consolidated and is not crumbling or coming away from the background. Any loose plaster should be removed, and the surface should be in sound condition before overcoating.
If the existing plaster surface is smooth, consider applying a coat of breathable plaster primer to add a key and provide grip for the new plaster.
Mist or brush the existing plaster surface with water to help control suction as needed.
Recommended plaster application
Mix Smooth to approx. 7 litres of cool, clean water per 20kg bag of dry powder used.
Mix the plaster using a paddle mix for at least 2 mins. Leave the mix to stand for 5-10 mins, then mix again for 1 min.
Base coat of Smooth at 1-2mm.
Top coat of Smooth at 1-2mm.
After the top coat is set, hard trowel to compress to 2mm total thickness. Trowel smooth. Optionally, apply a lightly dampened sponge float to the plaster in smooth circular motions, then with a clean finishing trowel, glide over the plaster to achieve a smooth surface finish. Be careful not to overwork the plaster at this stage. Do not use water to aid finishing.
Bag calculator
Use this calculator to work out how many bags of Universal to order for your job.
Bags required:
