How best to fill a large gap in a wall

[sstandard]

Hi

I am replacing skirting and replastering walls in an old room. Above the skirting there are a couple of largish, deep holes in the wall, which i need to fill properly before plastering over. Do you know what the best product to use would be to fill the gaps? Im thinking maybe that expanding foam stuff but not having done it before im not really sure.

Thanks

 

[masona]

I would use fast rapid cement like Jetcem + sharp sand. I not sure what reaction you'll get with plaster onto foam

 

[DAZB]

You can safely use foam and plaster over it because once the foam has cured that's it. It is a solid ,stable material once set and can be cut , shaped , sanded , painted , plastered , etc....That would be my choice for the job and cut it flush to the wall once set .Make sure you blow any loose dust or debris from the holes first though. Happy plastering.