Rendering a arch?

[Bones10]

Lads I got the render the side of house but it has two chimneys going up around 3m high and 3m apart before they join together to make 1 big arch, what would you say best way to get good angles on arch for when I'm beading? Cheers lads

 

[johniosaif]

Could you use plastic render beads and cut them like the skim arch beads,?

 

[raggles]

Could you not just form an arris ? it may take a little longer but if your not by yourself not that much ?

 

[Bones10]

Could you use plastic render beads and cut them like the skim arch beads,?

Yea did think about doing that but wasn't sure as never done it, if been done before that's a option

 

[johniosaif]

Yea did think about doing that but wasn't sure as never done it, if been done before that's a option

You could set them in with render and use nails too as long as you keep it square allowing a coat of render both sides of the bead as you would normally do.

 

[moy83]

If the arch is well formed by the bricklayer the beads should work out handy enough for you , but an arch cut out of ply is fool proof really if the bricks are off . Nail it up and bring a lat down either side of it , plaster the inside of it and the next day strip the timber , tidy the arras up wit a stanley and finish the rest of the gable working it into the arras . I think the corner looks way better without the beads but everyone is different

 

[johniosaif]

If the arch is well formed by the bricklayer the beads should work out handy enough for you , but an arch cut out of ply is fool proof really if the bricks are off . Nail it up and bring a lat down either side of it , plaster the inside of it and the next day strip the timber , tidy the arras up wit a stanley and finish the rest of the gable working it into the arras . I think the corner looks way better without the beads but everyone is different

It can look better, depends on a few things ..but beads set on properly makes it job done but each idea has merit equally

 

[Rigsby]

Cut plastic beads as mentioned. Cuts about 30-40mm apart. On the outer edge the cuts will need to be 'v'ed. Stick in scratch coat and nail. If the joints are hard you may need masonry nails, if you cant get any use cable clips either temporary or if you can hammer flat.

 

[malc]

i would use hardboard to form an arch. do the face first then the reveal ,after the face has gone hard enough to drop the hardboard .make sure you put some packing behind the hardboard so that you can finish the reveal to the arris without showing a joint.
we have just finished a wreck house for english heritage that had 6 arches on each wall and this was the method we used.

 

[jcrplast]

Its hard to give proper advice without actually seeing the job.

Same goes with describing how to do them.

 

[malc]

Its hard to give proper advice without actually seeing the job.

Same goes with describing how to do them.

an arch in render is a bog standard thing.

 

[jcrplast]

an arch in render is a bog standard thing.

Bones, and the varying advice say no.

 

[johniosaif]

I am the all seeing john, I see his arch through my experienced eyes as does the guys above,

 

[bubbles65]

:RpS_thumbsup:

 

[bubbles65]

 

[johniosaif]

Quality, enough said...

 

[Minh]

You sure have attention to detail: even a do not cross line on the end of the wall

 

[jcrplast]

Free hand over brickwork ?.

 

[bubbles65]

You sure have attention to detail: even a do not cross line on the end of the wall

Usually read as 'Please ignore'

 

[bubbles65]

Free hand over brickwork ?.

Yeah, apart from forming the hard arrisses for the internals. :RpS_thumbup:

The scratch coat was freehand.

 

[superspread]

Never done it this way but just a suggestion , could you not use internal arch beads , I realise the thickness near the arris could pose a problem,but depending how u stick them u still might get 5 mm near the edges, just a thought

 

[S a plastering]

Use a plastic drip bead upside down bends round nicely you can overhang it to your thickness

 

[essexandy]

The way to deal with this depends on how tight the curve of the arch is. I've fitted beads round some fairly tight curves but have tackled others where I couldn't get an acceptable shape using a bead.

 

[Bones10]

The way to deal with this depends on how tight the curve of the arch is. I've fitted beads round some fairly tight curves but have tackled others where I couldn't get an acceptable shape using a bead.

The arch is huge 3m wide and 1.5 high from start of bend to top of arch. If that makes sense?

 

[essexandy]

The arch is huge 3m wide and 1.5 high from start of bend to top of arch. If that makes sense?

So half round then.
It can be quite tricky getting a bead round that curve without getting distortion.

 

[BrummieTrev]

I would tie a piece of string to a pencil and to a fixed point on the ground, let string out to desired radius 1.5m in this case, spin radius with pencil marking my cut on 3mm ply or hardboard, cut out with jig saw, carefully nail to finished face and form reveal/soffit, remove template and make good if required. Just as @malc described.

 

[bubbles65]

I would tie a piece of string to a pencil and to a fixed point on the ground, let string out to desired radius 1.5m in this case, spin radius with pencil marking my cut on 3mm ply or hardboard, cut out with jig saw, carefully nail to finished face and form reveal/soffit, remove template and make good if required. Just as @malc described.

A slate batten is good for this, doesn't stretch either :RpS_thumbup:

 

[Arti]

i would use hardboard to form an arch. do the face first then the reveal ,after the face has gone hard enough to drop the hardboard .make sure you put some packing behind the hardboard so that you can finish the reveal to the arris without showing a joint.
we have just finished a wreck house for english heritage that had 6 arches on each wall and this was the method we used.

@malc got any pics marra

 

[malc]

@malc got any pics marra

i shall try to put some pictures on i gave up last time i tried!
a wreck house, 200 hundred years ago there was as many shipwrecks as there are car crashes today. the goods that was washed up on shore where placed into a wreck house until the owner could collect. there are 2 wreck houses in brightlingsea, essex. the one that we rendered in lime, was right on the waterfront and got flooded out twice a day.and had been modified as a gun post in ww2.

 

[tyzak]

you can buy plastic flexi beads for exactly that type of job

 

[Dr.B]

I've used plastic stop beads in the past for a quick job or if the render is to be painted. But for a proper job I've always taken my time and cut a ply template and do the reveals first take the template away and do the face. I've managed to do it in one visit being careful.

 

[currymunster]

I've used plastic stop beads in the past for a quick job or if the render is to be painted. But for a proper job I've always taken my time and cut a ply template and do the reveals first take the template away and do the face. I've managed to do it in one visit being careful.

you say one visit. My question is whats best do reveal and match face in on same day or leave to dry and match in following day.
In my experience day after is difficult to match in cause of shrinkage.

 

[Dr.B]

yes I generally do the face and reveal in one day to match in better. it helps to have someone to help with holding a rule or guide up for you.

 

[spunky]

you can buy plastic flexi beads for exactly that type of job

where from?

 

[malc]

you say one visit. My question is whats best do reveal and match face in on same day or leave to dry and match in following day.
In my experience day after is difficult to match in cause of shrinkage.

we put all of the face on first, with a hardboard template ,packed out to receive the head at a later date. we finish to the hard arris, making sure that there is no joint for water penetration.