Hello,

I am nearly ready to glue my celotex and plasterboard to my internal
walls. I removed the old plasterboard and am back to the masonry but
it needs a clean to give a good surface for the adhesive.

What's the best thing to use to clean them up? I was thinking a brass
cup brush in an angle grinder on the basis that a flap disc might wear
out, or am I being too heavy handed? What does the group think?

Thanks,
Stephen.

On Tuesday, 22 September 2015 18:32:59 UTC+1, Stephen wrote:
Hello,

I am nearly ready to glue my celotex and plasterboard to my internal
walls. I removed the old plasterboard and am back to the masonry but
it needs a clean to give a good surface for the adhesive.

What's the best thing to use to clean them up? I was thinking a brass
cup brush in an angle grinder on the basis that a flap disc might wear
out, or am I being too heavy handed? What does the group think?

You're kidding, that'll rip the masonry apart. A stiff plastic bristled brush then a wet rag frequently rinsed should do.


NT

Just seal it with dilute PVA. For better adhesion apply a bonding mix of PVA once the sealing coat has dried prior to applying your dry lining adhesive.

Richard

On 22/09/2015 18:33, Stephen wrote:
Hello,

I am nearly ready to glue my celotex and plasterboard to my internal
walls. I removed the old plasterboard and am back to the masonry but
it needs a clean to give a good surface for the adhesive.

What's the best thing to use to clean them up? I was thinking a brass
cup brush in an angle grinder on the basis that a flap disc might wear
out, or am I being too heavy handed? What does the group think?


I think you are over thinking it. If you are worried about adhesion,
then brush off any loose material with a normal dustpan style brush and
slap a coat of dilute PVA over any particularly flaky looking bits.


--
Cheers,

John.

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On 22/09/15 18:33, Stephen wrote:
Hello,

I am nearly ready to glue my celotex and plasterboard to my internal
walls. I removed the old plasterboard and am back to the masonry but
it needs a clean to give a good surface for the adhesive.

What's the best thing to use to clean them up? I was thinking a brass
cup brush in an angle grinder on the basis that a flap disc might wear
out, or am I being too heavy handed? What does the group think?

Thanks,
Stephen.


A brush down with a bristle brush or broom.

That is all it needs. Take off the surface dust and the adhesive will
stick just fine.

On Tue, 22 Sep 2015 19:26:12 +0100, John Rumm
wrote:

I think you are over thinking it

Thanks. I was probably worrying about nothing (as usual) or trying to
over-engineer a solution!