Cavity wall insert / recess box

[baker332]

Hi all,

Built extension that includes an outside cavity wall now inside.

I'd like to add a recessed box into the cavity first skin of bricks not blocks, to aid hiding of TV cables eventually - It's quite small needs two bricks horizontal by say 6 bricks vertically, will this impact the structure of the wall? Would a small lintel be required?

It's almost like a gas/electric meter box that inserts into the cavity, do these have some form of load bearing built into them?

TIA.

 

[noseall]

will this impact the structure of the wall

No. Unless it's directly beneath a lintel bearing.

 

[baker332]

No. Unless it's directly beneath a lintel bearing.

Thanks noseall - what is let's say the maximum I could go to before needing a lintel?

 

[noseall]

Thanks noseall - what is let's say the maximum I could go to before needing a lintel?

I'd always use support, even if it's just to prevent the odd half brick from falling.

 

[baker332]

I'd always use support, even if it's just to prevent the odd half brick from falling.

Well, the box being inserted essentially provides support for a half falling brick but it's more to do with the bearing than anything is my concern.

 

[^woody^]

Any opening in a wall greater than one brick should be supported - either by something in the wall or something in the opening.

 

[baker332]

Thanks Woody, this is what I was thinking. Although it's unclear how they fit the meter boxes?

I'm looking to use a angled steel like this:

Rothley Galvanised Steel Angle 1000mm x 36mm x 36mm - Screwfix

Order online at Screwfix.com. Equal-sided steel angle. Galvanised surface for long life and durability. Ideal for use in construction. FREE next day delivery available, free collection in 1 minute.

www.screwfix.com

Guess I'd need to put this in the front, as would be impossible from the back without taking everything out.

 

[^woody^]

Use a couple of hammerfix or suchlike.

 

[baker332]

Use a couple of hammerfix or suchlike.

View attachment 329724

Thanks Woody - just checking we are talking with a steel plate right?

 

[^woody^]

No, two screws.

 

[baker332]

Srsly two screws is enough here? I woudn't have thought that was the case?

Is it only holding a brick up as the insert could do that, what would a house builder do with the electrical/gas meter cut outs?