Dot and dab with foam

[GB_Groundworks]

Anyone used low expansion foam to dot and dab plasterboard to brick walls albeit painted brickwork

Was going to use standard adhesive but came across this method and got me thinking.

I've got about 300m2 to fix



Edited By GB_Groundworks on 1390432419

[lutonlagerlout]

we tried it once and it was a disaster
if its painted then we prime the wall with PVA then use drywall adhesive
why were you thinking of foam giles?
cheers LLL

[msh paving]

im stripping out flood damaged house at mo. house we are doing now the conservatory was done with foam onto lightweight blocks , no stick the boards were also held on with screws,seamed crap to me MSH

[GB_Groundworks]

Just saw it and wondered if it was the new thing that saved time and money but ill stick to board adhesive

[mickg]

I watched it being used on a loft conversion about 4 years ago and was not impressed with it but the plasterers thought it was brilliant - the young lad was stood there holding the piece of board waiting for the foam to set then still had to wedge it in position as it kept falling down - doh

it works well if your patching up a hole so you don't have to wait for the drywall adhesive to set hard before skimming but for large areas I personally would use adhesive

[msh paving]

this is what i took of today



boston in linconshire, flood water, MSH

[Tony McC]

I know it has its uses, but I often think that this expanding foam gunk is a cowboy's dream as it almost encourages bad practice and corner cutting.

This step repair I spotted in that London is a classic example of f*ckwittery.....

[slowbutrough]

I think you may be after this GB, 'Insta stik mp' made by Dow. I've never used it personally but it is designed specifically for the job, I.E it's not just your normal £4.00 a tin funny foam. HTH

[DNgroundworks]

which pleb would bed a step unit down with foam?!

[Tony McC]

That location is owned by a big property company and it was re-paved around 10 years ago using very expensive yorkstone flags and portuguese granite setts. Over the years, there have been a few repairs, some down to poor installation (not all that many, actually), some due to the insatiable desire of utility companies to dig up new paving, and some due to changes in use.

In this example, the stanchion was added some time after the yorkstone step was installed, and I suspect that either the tread unit was removed to be drilled to fit the base plate, or in-situ drilling rattled it loose from its bed. Rather than chip out the old bed and jointing to effect a proper re-lay on new mortar, the installer had the bright idea of 'glueing' it back into place with expanding foam. This just goes to show that they obviously had neither any genuine paving skills nor the nous to bring in a paving specialist to re-seat the tread.

I'm guessing they didn't think it through and hadn't understood that their brilliant idea would result in a massive case of 'sore thumb syndrome'. The failure to clean the spillages just confirms the diagnosis of f*ckwittery!