Hole in wall down to the breeze block, how to fill up hole?

[Jeff543]

I had the old central-heating apparatus all removed but it's left holes in the wall down to the breeze block level. Does it need cementing over or would polyfilla do the job? The square hole at the bottom is an old central-hating vent that goes right through the wall, i'm not concerned about that one yet.

 

[Notch7]

chip out all the loose making it bigger then fill with easi fill in a few layers

dont use polyfilla

 

[opps]

I would go for Toupret TX110. It is a "rapid" set.

Toupret TX110 Rapid Drying Interior Filler

Rapid drying filler, for interior use. Exceptional adherence and shaping qualities. No need to spot prime, will not flash or grin. Can be painted in approx 3 hours.

www.toolstation.com

It will only require one fill and if applied in the morning, should be ready to sand by the afternoon.

 

[^woody^]

Polyfilla or any filler will do

 

[Jeff543]

It's done thanks, looking good.

 

[Jeff543]

I would go for Toupret TX110. It is a "rapid" set.

Toupret TX110 Rapid Drying Interior Filler

Rapid drying filler, for interior use. Exceptional adherence and shaping qualities. No need to spot prime, will not flash or grin. Can be painted in approx 3 hours.

www.toolstation.com

It will only require one fill and if applied in the morning, should be ready to sand by the afternoon.

So compared to Easifill this is high-speed hardening?

 

[opps]

So compared to Easifill this is high-speed hardening?

It will harden much faster, not instantly, but it has cement in it which means that it doesn't rely solely on evaporation. Easifill only cures through evaporation. If for example you were to fill a 30mm deep (and wide) hole with easifill, it would probably take in excess of a week to cure, the TX100 might be sandable after 30 hours. To be fair, neither product is designed to fill such deep holes.

If I am faced with such holes that I need to deal with ASAP, I use two pack fillers. The deeper the hole, the more heat that they generate and the faster they harden. I could sand something that deep after about 20 minutes. 2 pack fillers (think: car bodywork fillers) are however more expensive and harder to sand.