Hi all,  has anyone any experience of inclusion rates of perlite in hyd lime/sand render?

application is internal wall insulation pre bonding coat, pre wood fibre insulation.

 

the notion is to lift/soften the dew point and raise U by a small degree as am achieving fairly low value with just the wood fibre board, however have plenty of `U` to trade on roof and floor and quoted L15.1 b. 

 

Thanks, Nick

Welcome.

 

Hmm, what's an  inclusion rate  ? 

If I'm asking that then the direct answer to your question is - no - . But I'm interested in the answer.

How about chucking a handful of perlite  in the normal  mix?

 

Our residents chemist ( a certain Mr Harris) will be along soon.

Have way down the page you will see a table of mixing amounts. 

http://www.schundler.com/plaster.htm