Filling large holes in plasterboard before tiling - solid wall behind

[Dave Holland]

Hi All,

I've not been able to find a conclusive answer to this one after trailing the interweb relentlessly so hopefully some knowledgeable people here can help!

I've removed some old ceramic tiles in the kitchen and predictably the plasterboard underneath has suffered damage. I've been reliably informed the best course of action is the replacement of the plasterboard in full but that's been under the assumption it's a dot and dab wall or similar, however there's a breezeblock wall behind it so is there the potential for using a gap-filling compound? The hole is less than 30mm deep (from plasterboard to breezeblock) but it's about 250mmx300mm in diameter.

I don't need a perfectly smooth finish because I will be tiling over it, but of course it will need to be level and be a good substrate for tile adhesive. Even as a novice tiler I know that preparation is everything so basically, what's best? Do I replace the entire plasterboard, just patch it, or fill it and if so, what's best?


Thanks very much in advance.

Dave

 

[White Room]

Re: Filling large holes in plasterboard before tiling - solid wall beh

You could cut the hole square and replace with plasterboard or use Thistle bonding, at that depth 2 coats would be required and the drying time as well.

 

[Chalker]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Welcome to the forum.

you could cut a piece of plasterboard and fix it in place with board adhesive. Then fill the gaps with the adhesive too.
goes off very quick.

 

[Dash J]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Can you tile onto expanding foam?

 

[White Room]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Not something I've ever tried.....and probably would'nt.

 

[kimboslash]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Been there before a few times, as above i have cut the hole square and then filled with another piece of plasterboard and board adhesive, simple.

 

[Dash J]

Re: Filling large holes in plasterboard before tiling - solid wall beh

I'm into expanding foam at the minute
Cut out plasterboard then re instate with expanding foam opposed to adhesive

 

[Time's Ran Out]

Re: Filling large holes in plasterboard before tiling - solid wall beh

I'm into expanding foam at the minute
Cut out plasterboard then re instate with expanding foam opposed to adhesive

Have you seen the price of expanding foam!

 

[Dash J]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Haha,it's pricey but quicker and cleaner imo

 

[Handyeire]

Re: Filling large holes in plasterboard before tiling - solid wall beh

Cut piece of plasterboard and drill a hole in it, put bit of string through it and put tgr plasterboard inside the hole after putting some filler on it, pull the string and the plasterboard should stick on inside if hole and cover it. Drill the string in place until filler sets then cut it and fill in the void with more filler. Easy job and should be done in notime.