As much as I love this site, I stumbled across the following
www.diynot.com
The article starts off well, explaining the importance of reducing the level of suction, recommending that readers follow the thinning instructions on the tin... and then...
You omitted to mention that if the mist coat is too thin when the full fat paint is rolled over the pseudo mist coat, subsequent coats of full fat might rip the previous coat off because the mist coat did little to nothing for the level of suction. I have lost count of the times that the builder has done the 50/50 before I turned up. I didn't notice until I applied the second full fat coat with a roller and sheets of paint started ripping off
The 50/50 recommendation should be sent to room 101... along with recommendations to apply thinned PVA to new plaster.
Oh, and recommendations to use dilute "contract matt" are wrong on many levels (not a recommendation on the linked page). The low latex paints are designed for plaster which is still slightly damp. They do zero for the level of suction.
Sorry, end of rant... and thank you for the site.
Mist Coat Ratio - Why it is important and what should it be.
A mist coat is the thinned first coat of paint used on new plaster or very porous surfaces. The main goal of this is to cover the surface and decrease its absorption capacity.
www.diynot.com
The article starts off well, explaining the importance of reducing the level of suction, recommending that readers follow the thinning instructions on the tin... and then...
You omitted to mention that if the mist coat is too thin when the full fat paint is rolled over the pseudo mist coat, subsequent coats of full fat might rip the previous coat off because the mist coat did little to nothing for the level of suction. I have lost count of the times that the builder has done the 50/50 before I turned up. I didn't notice until I applied the second full fat coat with a roller and sheets of paint started ripping off
The 50/50 recommendation should be sent to room 101... along with recommendations to apply thinned PVA to new plaster.
Oh, and recommendations to use dilute "contract matt" are wrong on many levels (not a recommendation on the linked page). The low latex paints are designed for plaster which is still slightly damp. They do zero for the level of suction.
Sorry, end of rant... and thank you for the site.
