over the last few months i have been watching a team of builders erecting some new timber frame dwellings,all the outside looked like marine ply and when i looked again a few days later they had been rendered and looked brill,how did they render on to the ply outer?,has me beat !!
how is it done
Nov 06, 2007
17 Replies
================================== Probably expanded mesh.
Cic.
Keep watching. I doubt it's marine ply, more likely wbp. Rendering is probably stipple paint. 5-10 years max they'll be on the keeping Guy Fawkes warm.
Have a look at some American construction web sites and all will be clear. They typically use wire mesh and stucco.
Now whether you think that looks "brill" is something else.
"Little boxes, on the hillside ..."
"And they're all made out of ticky tacky and they all look just the same."
Not mine mate. At least its not a little tacky box. Its a bloody warm and cosy place to inhabit.
Done that way...
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Bloody nightmare to fix into as well.
huh? I've had no trouble at all.
If you want extra security, use a long screw and pick up on the ply..
Nail expanded metal lath all over it. That will then take a conventional scratch coat.
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was quite anal about ensuring the lath was well and regularly fixed on mine. However, while I was doing mine, I was also watching a set of builders doing another conversion a little way away - got a nice viewpoint from my scaffold. The renderer there just used a carpet fitters stapler to fix some building paper over the ply, and then again to hold the expanded metal lath. I was surprised how little fixing he gave it (ten staples per 8 x 2' sheet maximum perhaps. Still there render is still there a few years later.
More details of lath use here:
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Easy enough with the Bosch multi material bits...
The only particularly interesting hole I need to make through it was for a soil pipe. The combination of render, expmet lath, ply, PIR foam, and plasterboard made for an interesting 130mm hole!
Big electric padsaw with a metal cutting blade.
There's a bit more meat in this one than the average Wimpey though isn't there? :-)
Who's in charge? The cat or the slobberador?
A neighbour (who is also a builder) externally lined one of his
9" walls with PIR sheets, then chicken wire, and then rendered. I didn't see how the chicken wire was attached -- might have been battens between the PIR sheets, and I would guess he used some type of bonding to make the render stick to the PIR too. It's still all there 20 years later.
Sorry for the ignorance (!) - what are PIR sheets; obviously insulation something but what ?
Rob
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this man has used eternal insulation which is "directly" rendered with no chicken wire or whatever.
Look at the site and email him for more info.
Not usually too fond of 3/4" of sand and cement render though!
(in the end I chain drilled the outline of the hole through the render, and SDSed the render off the hole, tinsnipped the expmet, and stuck a big bimetal holesaw through the rest)
Polyisocyanurate foam... typically high performance insulation boards from the likes of Celotex, Kingspan, Ecotherm etc.
That's a lot of insulation. Any house left inside it?
No, the insulation goes on forever...
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