Weber Plast TF 1.5mm: guidance for self-builder

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LesPaul01

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Hi folks,
Looking for some advice ref build-up for external render for my new build. I know NOTHING about plastering (or virtually nothing).
So this is about 250m2 block wall external plaster job and my spec is approx. 20mm total build up of (1) sand/cement scratch coat and (2) rubbed-up sand/cement coat. My final coat I'm considering getting a mono specialist to do from an approved weber list, to do a single finish coat of an off-white weber tf plast or tf sil (1.5mm).

So the questions for you experts if you'd be so kind:

(a) weber tf plast or the more expensive silicon version (about double the price)?
(b) for minimising cracking I have cut, for the convenience of the plasterers, nylon reinforcement mesh for the corners of all windows/doors, extending about 1 ft into the wall in each direction. Does this get pushed into the scratch coat or should I do a rendaid coat, cover the lintels with this and embed the reinforcing mesh into the rend aid?
(c) Is there something I should be careful about ref this mesh - i.e. not push it too deep so that it is not 'fixed' to the blockwork underneath?
(d) Are the sections of mesh I have prepared ("L" shapes for the window corners and another "L" with a notch for around the window edge, around window cill and below the cill) big enough to reduce the cracking. I've got loads of left over mesh from a previous refurb (it's k-rend bought for under a k-lime internal plastering job) so should I be more generous with it?

Thanks in advance!
 
If I remember right you get a 1m2 of mesh. You cut out a corner and from the sill it will be 700mm below the sill 300mm up the side of the reveal and 500mm under the sill. So out of a 1m2 mesh cut a 300mmx500mm corner out. Same on the window and door heads. Try ringing Weber for confirmation but ask two technicians and will probably get 2 answers.

They will not recommend sand and cement. Consider Weber ocr. If you are putting OCR on at 15mm thick then mesh imo 5mm below the surface. Silicone is more dirt and water repellent.

If you are to use sand and cement then shop around for the acrylic or silicone bucket stuff. Weber is mega bucks! I use JUB and plasterers one stop on here will sell it to you for a good price.
 
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My advise would be if the plasterer you're thinking of using for this project can't answer these questions for you then use someone else who can.
 
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Brings me to the question. My contractor, as most do, uses a regular team of the usual trades. Who are in my opinion second to none. So I'm extremely fortunate that ever piece of work done so far (foundations/blockwork and joinery) is perfect and done at the right price.
For the plastering team the same applies - excellent workmanship on a daily rate so I have no worries about the quality and care of work and that nobody is taking the pi** when it comes to costs.
My Question here is for a competent team (two people) who have been plastering all their lives (sand/cement rubbed up, dashes etc) but perhaps have little (or no) experience of a monochouce product like Weber TF would it be reckless of me to ask them to apply the TF. Since I know NOTHING about plastering it seems that this product is like a granular paint and the main issue for the applicator relates to making sure it doesn't dry out to quickly and is blended nicely.
Surely therefore for any competent experienced plasterer handy with a trowel a bit of common sense will make this feasible.
Specifically I'm thinking about (a) choosing the right conditions - not sunny, not likely to rain, (b) working quickly and in small sections (aided if the house has lots of small elevations and is well broken-up), (c) working in pairs whereby plasterer 1 is floating it on and plasterer 2 is blending it, (d) making damned sure the windows/doors etc are all well covered.
As the general build-up is unfamiliar to the team and taking a range of advise the lads are relying on my guidance to get us to the pre-Weber stage including applying mesh into RendAid on stress points and a WeBer primer on top of the rubbed up sand/cement.
What do you think?
 
Afraid the great Les Paul is passed away. His memory lives on in his legacy of superb guitars. I just picked a name. I don't think Les would have had to worry about this sort of stuff. He'd just have got a contractor into do his condos and told them to get on with it and hand him the keys when his house was ready. Money not being an object!
 
Get someone to price it mate , make sure they have a large list of jobs you can look at , and Ritchie Blackmores your man , game on :RpS_thumbsup:
 
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