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Deco99 · 24-01-2021, 00:57

Hi, new windows installed. House replastered. I don't see any noticeable gaps between the plaster and window frame. Just wondering, aside from caulking the window board, do I still apply sealant to the rest of the windows/doors

WildCardDoW · 24-01-2021, 01:00

Quote:

Originally Posted by Deco99

Hi, new windows installed. House replastered. I don't see any noticeable gaps between the plaster and window frame. Just wondering, aside from caulking the window board, do I still apply sealant to the rest of the windows/doors

No, hopefully the plasterer (or someone) sealed the windows if they weren't already. You'd seal from the window to the concrete and put the plasterboard or plaster over this. That's usually how you get an airtight seal at windows!

Deco99 · 24-01-2021, 09:53

Quote:

Originally Posted by WildCardDoW

No, hopefully the plasterer (or someone) sealed the windows if they weren't already. You'd seal from the window to the concrete and put the plasterboard or plaster over this. That's usually how you get an airtight seal at windows!

Ah right. Ya, there was expanding foam put around them when being installed.

Evd-Burner · 24-01-2021, 10:34

I bought a house over a year ago and noticed bad drafts at the front of the house where there is a cavity wall. I was going to replace the windows and also have the cavity pumped. Insulation guy said pvc windows were good this his work would seal them, recommending just a service.

He insulated the cavity between the bricks/blocks and between plasterboard and inner leaf. A huge amount of insulation was coming out around the external windows. I don't think there was any sealing at all, all of huge came out after the guy made a large effort to block up holes and cracks etc.

There is virtually no drafts now!

listermint · 24-01-2021, 10:37

Expanding foam doesn't provide an airtight seal. It never will it's a middling replacement for airtight tape.

If anyone's getting windows installed they should prepurchase airtight tape and when windows are done put the tape on something like contega SL which can be plastered to easily.

Foam and caulk are a poor replacement for above. But are better than none .

24-01-2021, 00:57	#1
Deco99 Registered User Join Date: Aug 2011 Posts: 1,602 Adverts \| Friends	Seal around Windows? Hi, new windows installed. House replastered. I don't see any noticeable gaps between the plaster and window frame. Just wondering, aside from caulking the window board, do I still apply sealant to the rest of the windows/doors

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24-01-2021, 10:34	#4
Evd-Burner Registered User Join Date: Sep 2005 Posts: 1,298 Adverts \| Friends	I bought a house over a year ago and noticed bad drafts at the front of the house where there is a cavity wall. I was going to replace the windows and also have the cavity pumped. Insulation guy said pvc windows were good this his work would seal them, recommending just a service. He insulated the cavity between the bricks/blocks and between plasterboard and inner leaf. A huge amount of insulation was coming out around the external windows. I don't think there was any sealing at all, all of huge came out after the guy made a large effort to block up holes and cracks etc. There is virtually no drafts now!

24-01-2021, 10:37	#5
listermint Registered User Join Date: Aug 2007 Posts: 27,141 Adverts \| Friends	Expanding foam doesn't provide an airtight seal. It never will it's a middling replacement for airtight tape. If anyone's getting windows installed they should prepurchase airtight tape and when windows are done put the tape on something like contega SL which can be plastered to easily. Foam and caulk are a poor replacement for above. But are better than none .