Filling large gap in exterior wall

Curb Your Enthusiasm

Hi folks,

Hoping you can advise.

We have a large gap/hole in the exterior wall, at the end of the outside wall directly next to a tarmac path so the gap is at ground level.

It's perhaps 12cm in length, maybe 3cm deep so quite a large gap. It had previously been filled in with concrete but this eroded/fell out over the years. Its an old house, approx. 100 yrs old. Original build was with sea sand and stones.

What would be the best option or product ot use to fill this? Would gravel/aggregate to fill + pollyfila work or something better?

Many thanks!

listermint

Any pictures.

fulanoquetal

Curb Your Enthusiasm wrote: »

Hi folks,

Hoping you can advise.

We have a large gap/hole in the exterior wall, at the end of the outside wall directly next to a tarmac path so the gap is at ground level.

It's perhaps 12cm in length, maybe 3cm deep so quite a large gap. It had previously been filled in with concrete but this eroded/fell out over the years. Its an old house, approx. 100 yrs old. Original build was with sea sand and stones.

What would be the best option or product ot use to fill this? Would gravel/aggregate to fill + pollyfila work or something better?

Many thanks!

You need to use something suitable for outside - which polyfilla isn't (AFAIK). I would probably use some expanding foam to fill the first 2 inches and then a smooth cement/sand mix to finish. B&Q etc sell DIY bags of sand/cement mix. Be careful what you buy....Concrete mix will have small pebbles in it. Postcrete is fast settng concrete (like 20 mins). Sea sand prob has salt in it and that is not good to have in concrete I think.

Rows Grower

You could use some flexible grout but depending how wide the gap is you might have to put apply it in separate layers.

Curb Your Enthusiasm

Thanks for suggestions so far folks. Have attached photo.

mad m

First things first, get a 310 straight marley connection onto that marley with a 90 degree elbow and direct water down past gully.

I’d get a chisel and hammer, knock out as much loose render as possible. Polybond area, mix up sand&cement and push into hole. Get small trowel and trowel it in. Leave for an hour and smooth area with a cheap sponge in rotating motion

Johnthemanager

mad m wrote: »

First things first, get a 310 straight marley connection onto that marley with a 90 degree elbow and direct water down past gully.

I’d get a chisel and hammer, knock out as much loose render as possible. Polybond area, mix up sand&cement and push into hole. Get small trowel and trowel it in. Leave for an hour and smooth area with a cheap sponge in rotating motion

I'd even put in some balled up chicken wire or light mesh first.

10-10-20

mad m wrote: »

First things first, get a 310 straight marley connection onto that marley with a 90 degree elbow and direct water down past gully.

I’d get a chisel and hammer, knock out as much loose render as possible. Polybond area, mix up sand&cement and push into hole. Get small trowel and trowel it in. Leave for an hour and smooth area with a cheap sponge in rotating motion

Take out that filler/caulk in the bottom left.
I'd build it up in 2 or even three layers. That should hide the shrinkage if the initial mix is too wet.
Initial mix of 4:1 (sand:cement) perhaps, with 5:1 or 6:1 on the final layer. Then sponge-finish after the hour or just a bit more.