Air tightness of quinn lite blocks

[DeeJunFan]

Hi Guys,

 

Just wondering what people think is the best method to seal for airtightness quinn lite blocks?

 

Sand/Cement?  Parge coat?  

 

Any other options.  Its going to be a DIY job so easy and cheap is the preference.

 

Thanks

Damian

[Jeremy Harris]

What's the internal finish going to be?

 

Parge coating works inside OK, and also works on the outside face if there is going to be a cavity.

[DeeJunFan]

Thanks Jeremy,

 

Its on the inside skin of the block.

 

Finish is sand/cement scratch coat and skimmed.

[Declan52]

The scratch coat will seal it up then the skim will seal it up even more. Make sure they tape all the joins around the ceiling/wall junction gd as this is where it will crack.

[Jeremy Harris]

If there's going to be a scratch coat and skim, then that should ensure pretty good airtightness.

 

The internal parge coat method is really for making the inside face of a wall that's going to be dry lined airtight.