DeeJunFan Posted November 4, 2017 Share Posted November 4, 2017 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 Link to comment Share on other sites More sharing options...
Jeremy Harris Posted November 4, 2017 Share Posted November 4, 2017 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. Link to comment Share on other sites More sharing options...
DeeJunFan Posted November 4, 2017 Author Share Posted November 4, 2017 Thanks Jeremy, Its on the inside skin of the block. Finish is sand/cement scratch coat and skimmed. Link to comment Share on other sites More sharing options...
Declan52 Posted November 4, 2017 Share Posted November 4, 2017 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. Link to comment Share on other sites More sharing options...
Jeremy Harris Posted November 4, 2017 Share Posted November 4, 2017 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. Link to comment Share on other sites More sharing options...
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