Sorting a gap in a wall

[russellm72]

Hi,

Looking for advice on how I can make good this gap as illustrated in the picture below.

Gap picture

• russellm72
• 3 Feb 2009
• 1

There was a door frame in there originally to house and external door but an extension means that the whole wall is now internal.

The white side to the left was the original external wall and is rendered so a great deal tougher than the pink side which is plasterboard or some kind of plaster finish. The gap measures 8 cm wide and about 0.9cm deep on the rendered side and a bit more on the plastered (pink) side.

Would it be possible to cut away the damp proof membrane and cut a length of plasterboard (95mm) to insert into the gap. The whole wall could then be skimmed or is that wrong?

Any advice appreciated as I won't be doing the skimming myself.

Kind Regards

Russell.

 

[roughcaster]

How much depth is there on the left hand side (render), is it thicker than the plasterboard?

Roughcaster.

 

[DAZB]

I would do just that but you can push the DPM back in rather than cut it.

 

[badgerchief]

HI THERE
I wouldn`t cut the membrane push it back into the gap slightly spray the gap with water using a plant sprayer then from the bottom up fill the gap with expanding foam slowly and be patient !!!!
it will expand up to 500% depending on brand
leave to cure for several hours then cut excess off using a hand saw and the wall as a guide.

If you find you need to add more foam spray with water between coats the foam uses the moisture in the air to cure and this will help it stick
then skim over the following day

P.S. THIS IS VERY STICKY STUFF AVOID CONTACT AND COVER THE FLOOR SURROUNDING THE AREA AGAIN BE PATIENT WHEN CURED IT IS HARD TO THE TOUCH I TRY TO LEAVE THE STUFF OVER NIGHT WHEN EVER POSSIBLE