How to fill this gap?

rubble2

I made a post last week sometime about our external inset meter boxes and the state of the sealant that had been applied to fill the gap between the cabinet and the wall.

I have now hacked off the manky sealant and have been left with this problem, clearly the cabinets were not installed correctly as they are no where near flush with the wall.
As the cabinets are now full of meters and associated equipment, taking everything out and fitting them correctly is not possible so how would you make good the gaps as seen in the attached photo's?

I don't want to just cram more sealant in there like the original 'craftsman' did  but I am not sure what my best alternative is.

Should I try and make up some sort of wooden fillet to fit? or is expanding foam followed by some sort of filler (car body filler?) an option?

Appreciate any suggestions.

Thanks

shiraz99

You'd still want some sealant as you don't water ingress from the rear of the cabinet.

FreeBear

Put a block of wood on the casing, and gently tap it to see if the gap will close up. Then get yourself a couple of tubes of frame sealant to fill the gap with. Wipe over with a damp sponge to get a smooth finish.

stuart45

I guess you don't want the expense of an overbox.

rubble2

FreeBear said:

Put a block of wood on the casing, and gently tap it to see if the gap will close up. Then get yourself a couple of tubes of frame sealant to fill the gap with. Wipe over with a damp sponge to get a smooth finish.

Have already tried easing it back towards the wall a bit but it is not going anywhere unfortunately. I was trying to avoid just pumping the gap full of more sealant, was hoping for an alternative solution.

rubble2

stuart45 said:

I guess you don't want the expense of an overbox.

The box with the largest gap is the electricity meter box which is considerably larger than the gas meter box, have seen overboxes for the smaller size but not for the same size as our electricity box.

fenwick458

I have fixed a few of these back , I think they must just be bedded in with mortar, no fixings. and some of them come loose. if you push it back into place can you just drill though the side and fix it to the block?

stuart45

It's a few years since I worked on new builds, but the boxes were just built in. No mechanical fixings were allowed.

greenface2

can you silicone a 20 x 20 plastic block bead around it if it is fixed but gappy . 

rubble2

I am thinking of using some of this around the perimeter.

https://www.eurocell.co.uk/trims-and-cills/trims-quadrants-and-angles/30mm-cloaking-fillet-in-white-x-5m

Chickereeeee

Just get some 'backer rod' or 'joint-filler rod'. It is just lengths of foam rod of various widths specifically designed to fill gaps before finishing off with sealant. Just get some from ebay, amazon or local hardware store, of a bit larger than the gap you want to fill. Push it in. Fill remaining gap with sealant of choice. The foam is easily compressible, so getting wider than the widest gap is fine.