Is expanding foam instead of compo common practice?

Hi, a builder has put a patio door in and for the brickwork above the lintel, he's used expanding foam between the brickwork instead of compo. Is this common practice as he told me. Thanks Rylan

Advice from 37 local tradespeople

No! You should never use expanding foam as an alternative to sand & cement mix (Compo)

No

Absolutely not, foam is only ever used in the 5/10mm gap which is the tolerance when measuring/fitting a new window or door it should never be used as a substitute for mortar it degrades over time. Thanks LMH Estates

I’d only use expanding foam to fill the gap around the frame once it’s been secured in by the fixings screws. The excess is trimmed off and either a plastic trim is used or pointed up.

No this is definitely not to be used as a replacement of mortar! Do you have photos as it’s not unusual to use expanding foam when fitting a door! But as you’ve explained it’s not meant to be this way

No this is definitely not common practice

hard to tell without seeing the issue but the brick work should be sat on the lintel normally a very thin bed or resin or slate can be used ,

No this is not acceptable expanding foam has no load bearing properties ..Only used between frame and lintel ..

Yes it is common practice to fill around windows or doors with expanding foam. Then you can point over it with mortar or apply pvc trims over the top.
Hope this helps.
Jack

Hi there the simple answer is no as expanding foam would still have movement when its gone off as compo goes hard the tradesman would be okay sealing the side of the doors with expanding foam but not for holding your bricks together

Not really

No this isnt comon practice.

Yes expanding foam is common practice in this situation

expanding foam can be used as an alternative to sealant to fill gaps around the door or window frames, it is not recommended for use in place of mortar or compo as it is not designed to provide structural support.

Brickwork above a lintel requires a strong and stable bond between the bricks and the lintel to prevent the bricks from sagging or moving over time. Traditional mortar or compo provides this support and helps to distribute the weight of the brickwork evenly across the lintel.

Definitely not always mortar 100%

If between the top of door and lintel then yes, if above that’s a big no!

You use mortar not foam on brickwork

No , expanding foam is for filling gaps around windows , doors etc to provide extra strength and windproofing

Yes

Don t understand why above the lintel. Above lintel shod be the brick without any gap, the gap is between the door frame and lintel. Any way any gap between bricks should be mortar, or dry pack mortar.

Thats not common practice it should be mortar between bricks.

Expanding foam is used in a wide range of applications especially when working with doors, windows and brickwork.

No it can not go between the lintel and brickwork it can go between lintel and door but that’s it

no foam is only a filler medium not structural

If it’s under the lintel where the door has been fitted and there’s a tiny gap then yes. This is common practice to seal to door.
But if it’s on top of the lintel and it’s for a brick to be bedded then no. This is pretty dangerous

This should be mortar between lintel and brickwork

Yes but I would prefer to do it in sand and cement

Definitely not, should be packed with slate and filled with mortar.

Yes alot of builders do this. Some use mortar aswell

foam is for filling little gaps that not seen and stuff if it actually face brick it needs pointing up properly

No this isn’t common practice to put expanding foam in the brickwork joints if that’s what you mean they should be pointed back in so it’s all solid and sound . If it’s around the patio door frame then yes expanding foam is used to fill in the gap around it before it gets sealed with a sealant

Absolutely not, expanding foam is primarily used to fill in small gaps or small voids and should never be used as an alternative to mortar to bond bricks together.

No, this should filled and pack tight with compo for strength purposes

It depends where it is. If it’s substituting a brick joint then this is wrong. But if it’s around the frame work in the patio doors then it’s fine.

Yes some people use mortor some expanding foam. It is personal preference i personally would use expanding foam

This is definitely not common practice at all
He’s been lazy there,or unable to actually relay the bricks

Hi, Absolutely not this needs to be removed urgently and mortar mix applied.

If he has filled around the door with expanding foam yes this is normal but for laying brick most certainly not.

Compare quotes from locally reviewed bricklayers

It's free and there's no obligation to hire.

Compare quotes from locally reviewed bricklayers

How it Works

step1
Step 1
Post a job for free
step2
Step 2
Tradespeople Reply
Medal
Step 3
Review profiles & Choose