How to insulate open ends of the wall which we are due to be capped

[Mubbashshir]

Hi All, 

 

From the open ends lot of cold is coming in winter. Although the builder told he will cap them using some plastic strips. Can we put some insulation at the end along the back side of plastic strips to ensure no cold escapes from wall.

 

Note: I believe the open gaps between the wall insulation and wall is for air ventilation and needed isn;t it

 

with regards

Mubbashshir

 

 

 

 

Edited June 1 by Mubbashshir

[mjc55]

Hmmm.  The gaps between the insulation leave a lot to be desired!

[ectoplasmosis]

That ‘insulation’ won’t be doing very much insulating I’m afraid… huge gaps between the PIR and the inner blockwork skin. 
 

As for sealing the cavity reveals, there are numerous ‘insulated cavity closer’ products out there. Pick the one that matches your cavity depth, target price and performance. 

[Kelvin]

Yes that’s really poorly fitted unfortunately. You can buy cavity closers but I’d say that might be the least of your problems. Do you have any pictures of this as it was being built. 

[Mubbashshir]

30 minutes ago, Kelvin said:

Yes that’s really poorly fitted unfortunately. You can buy cavity closers but I’d say that might be the least of your problems. Do you have any pictures of this as it was being built. 

What is the remedial action as we have not yet done plastering , also attached are some pictures

On 16/05/2025 at 19:34, Gus Potter said:

 

 

 

 

Edited June 1 by Mubbashshir

[Kelvin]

Are there any pictures of the insulation being fitted to show if these gaps are running across all the sections.  It’s more annoying as that type of insulation is designed to make it easier to make a good fit. 

[Mubbashshir]

[Mubbashshir]

Here is one more, What is the best remedial action for me before they plaster

[mistake_not]

Not a solution but read this thread of the consequences and remedial action:

 

I suppose options are:

1. Rip down bricks, replace the PIR with cavity bats / pump in eps.

2. Pump in eps from the outside 

3. Pump in a closed cell foam.

4. Give up, do IWI / EWI and an airtightness barrier.

 

2 is probably easiest and cheapest. Depends on if you have enough residual cavity for the beads to properly flow.