Do I need to close the cavity

[Danielf123]

I have recently removed a back door and windows with a small wall underneath it, knocking through to an extension, but i am now unsure what to do with the exposed cavities, there is a main one which is 50mm wide from the wall which was knocked out, the cavity on the floor and a slim one from the removal of the door and window, any help would be appreciated

Untitled

• Danielf123
• 17 Nov 2014
• 2

Untitled

• Danielf123
• 17 Nov 2014
• 2

Untitled

• Danielf123
• 17 Nov 2014
• 2

 

[jeds]

Current recommended practice is not to close the cavity with masonry but to use an insulated cavity closer. If you can't get one the right size a good alternative would be mineral wool (or inject foam as long as you can do it in a controlled way) with a vertical length of dpc. Also check the wall ties. There should be a tie for every course of block within 225mm of the opening. If there are any large areas without ties I'd add a couple.

 

[Danielf123]

Thanks john

How about the floor, would I just leave the cavity exposed as it is, and continue the kitchen flooring through?.

 

[Danielf123]

Thanks john

How about the floor, would I just leave the cavity exposed as it is, and continue the kitchen flooring through?.