Anyone know how this was achieved?

[Dan Hopgood]

I'm having a new extension built at the back of my house. The planners require me to match the existing texture of the walls as it's in a conservation area. The original finish looks like this:

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House is 1929 Collins house in Southampton.

I thought it was roughcast - but I've taken some render off the wall and there's no large aggregate in the mix. It was put on very thin - 3 or 4mm at most, direct onto clinker blocks in what looks like a single layer. It's a cementitious material.

My builder and I are both struggling for ideas on how this was done. Anybody got any ideas please?

 

[Plastererjonesy84]

That looks like it's been tapped with a stiff brush? The external chaps will have the real answer

 

[Dansouthcoast84]

Looks like sand cement with a soft brush tapped finish.

Im in portsmouth if we can help in any way.

 

[Rossi46]

Brush head stipple

 

[Rigsby]

As above.

 

[BigK]

Done by semi-pro 'plasterers the world over [emoji23]


Sent from my iPhone using Tapatalk

 

[Dan Hopgood]

Hmm,
My plasterer reckons not done with a brush. Some more pics:

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and

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Looks too smooth to me to have been done with a brush. The texture varies quite a bit too.

 

[Dansouthcoast84]

Hmm,
My plasterer reckons not done with a brush. Some more pics:

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and

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Looks too smooth to me to have been done with a brush. The texture varies quite a bit too.

Well that looks alot different from.your first post

 

[Jgreenplastering]

That's look more like a rough cast that's had about 23 coats of paint!

 

[Dan Hopgood]

Yep, it does look like that - and that's what I thought it was until recently. It's only had three applications of paint - it was unpainted until the 1980's (I have photo's) , was repainted in 2002 and again two years ago. The paint layer is really thin.

 

[Pug]

Could it be a wet tyrolene mix?

 

[Marshy]

It looks like they couldnt be arsed doing a proper finish of any description so i guess theres a pub very close by??

 

[S a plastering]

I would dash it with 6mm stone then when it's dry put a cement slurry over the top with a touch of sbr in till you get the desired finish cos trust me that is a shhhit original finish imo

 

[Dan Hopgood]

We're going to try two trials - one as a roughcast finish, the other with madmonk's dash and cement slurry option. We're a bit concerned about durability ( and frost damage) with a thin layer of cement slurry though - even with SBR in it, although the finish is a painted one, which would help.

 

[keithuk]

Just do the lot , with all the best will in the world , it will be hard to match

 

[PFTwales]

looks like a topcoat mix that has an aggregate in it and its just been scraped on

 

[carys]

I'm having a new extension built at the back of my house. The planners require me to match the existing texture of the walls as it's in a conservation area. The original finish looks like this:

Link Removed

House is 1929 Collins house in Southampton.

I thought it was roughcast - but I've taken some render off the wall and there's no large aggregate in the mix. It was put on very thin - 3 or 4mm at most, direct onto clinker blocks in what looks like a single layer. It's a cementitious material.

My builder and I are both struggling for ideas on how this was done. Anybody got any ideas please?

I think it a stipple brush finish whith about 20 years of paint defo not rough cast lol

 

[Ajax123]

is it sprayed on. Looks like the render you see in the cambridgeshire fens a lot.

 

[plasterjfe]

Its dragged finish applied thin over the surface of the render with a coarse grit.
Looks 5h1te dunnit i have the same on my house cant wait to knock it off
Can be done with a brush head n all.

Cant beleive conservation want to keep that rather than plain or mono

 

[Dan Hopgood]

There's no coarse material in the original mix. And it's only had a couple of coats of paint. Anyway, finish for new render started going on today. Going for roughcast with 2-6mm rounded aggregate. Looks pretty clumpy - I think probably due to the different aggregate sizes - roughcast is mixing up like wet concrete. I'll post a pic when done for you to comment on. That should be interesting(!)

 

[PFTwales]

mix it wetter if its clumpy

 

[Dan Hopgood]

New and old finishes together. New one is obviously different, but looks OK to my untrained eye.

Roughcast was as wet as we dared when applying it - would almost run off a hawk.
Render is cement/lime/sand mix with plasticiser in it. Scratch coat then thinish second smooth coat. Same mix for roughcast, but wetted down and 1 bag of horticultural grit (2-6mm) to 2 1/2 large trowels of muck. Roughcast flicked straight at wet second coat of render with a trowel.

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[Render Systems]

you dont put wet dash on with a hawk and trowel ... you use a bucket and harling trowel and chuck it on...

 

[Rob Price]

I'm having a new extension built at the back of my house. The planners require me to match the existing texture of the walls as it's in a conservation area. The original finish looks like this:

Link Removed
looks like roughcast very old work and been painted on many times over the years

House is 1929 Collins house in Southampton.

I thought it was roughcast - but I've taken some render off the wall and there's no large aggregate in the mix. It was put on very thin - 3 or 4mm at most, direct onto clinker blocks in what looks like a single layer. It's a cementitious material.

My builder and I are both struggling for ideas on how this was done. Anybody got any ideas please?