OCR Weber, one coat render, second application
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- เผยแพร่เมื่อ 8 มิ.ย. 2023
- Hi
this is my second application of Weber OCR, this time I've used mesh as well
First video can be found here
• Weber OCR one coat render
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First video can be found here
th-cam.com/video/ClJpBLuO4P8/w-d-xo.html
Nice wideo MrFxr, you have inspired me to do something very similar on my extension and i thank you for taking the time to show us 😊
Many thanks for kind words🙂👍
All the best
I did a scratch coat, then left it as it started to rain, came back the next day, solid and no runs (to my suprise) top coated it, and no cracks. I think its because of that scratch that it didnt crack.
Never going back to sand and cement, but expensive to do it that way but so much easier.
Thanks for sharing the update. I'm glad all worked out 🙂. I like the product but for large areas I still use cement or lime/cement mix
All the best 👍
Thanks for this. I have this product ready to try as a first time renderer on a landscaping wall in my garden. Thanks for explaining so well youve given me more confidence. Intresting to see a scratch coat isnt required as i saw previously. Thanks again.
Thanks 👍
If your wall is nicely flat you can go on it on one coat, if the wall is very rough that would result in very uneven thickness of the render than I would recommend scratch coat first, just to even it up. Also, if it's hot dry day spraying some water on the wall prior application is very helpful
@mrfxr1695 great thanks. I'll scratch then as its a concrete block wall.
Thanks for the reply 👍
I hope it all went well 👍
Probably the heat tbh but try first coating, rule off and scratch let it pull in until firm and then second coat and float and sponge. Works for me👍
Thanks Mark
That is a good idea, it makes all the sense
Cheers 👍🙂
shrinkage cracks are surface cracks , even if mesh was applied it wouldn’t of stopped the surface cracking, it’s usually due to high atmospheric temperatures, and if there’s a warm breeze its definitely gonna craze. mesh is to stop cracks from inside to out
I agree with you there. Almost no crazing happens when I spray some water on it during curing
I used ocr today, put my first coat on added mesh as I normally do that anyway, top coated it floated and sponges up as I was leaving to go home I see cracks coming I was baffled as it was coming away from the wall like you said. Only thing I can say it is, is the heat I had sun on my wall most of the day until 1pm then it was shade.
Must be sun. In two days I'll go back to the job where I did a section of the wall on Friday and let you know if I had any cracks on it.
@@mrfxr1695 you know you filled your cracks did you prime it at all or did you just use water and then sponged it in?
@@craiggraddon5102 I've just brushed some water over it and then used pointing trowel to push OCR in, scraped it flat and than sponge it gently
@@mrfxr1695 thank you I’ll do that tomorrow then
Maybe suction on brickwork ? Try rendergrip next time to control suction? Just a idea think it is prone to spider crack the ocr
really enjoy the way you explain everything clearly and you show your learnings along the way. all the detail in terms of timings, temparture, weather is great. I'm planning on using OCR Weber to render some block planters. i know you went back a few days after, but any idea how it has held up since then?
It is still good now, almost a year later. It is a good product 👍
@@mrfxr1695 great to hear!
With the ocr render system. You must seal the brickwork do a basecoat with mesh in it allow to dry. Then topcoat it! Treat the brickwork like you would render board! Even if it did crack after doing this you have covered yourself by doing everything you could to stop cracking !
I agree, brickwork has to be sealed. I used exterior grit sealer.
I wanted to test performance of OCR, because OCR stands for One Coat Render. I used it exactly as suggested by manufacturer. Seal the surface, no mesh, one coat. It crazed on brick.
I also tried it on concrete block, no sealer( I've sprayed blocks with water hose) one coat in two layers, wet on wet(with mesh on bottom layer) it came out perfect.
It all depends on surface, and exposure to sun and wind.
I will continue to use it on small surfaces where I can benefit with one coat application, but for any larger surfaces I still prefer traditional scratch coat, then top coat with sand/cement and sand/lime/cement and render mesh if necessary
On breeze block you should use Rendaid and apply the mesh layer to the rendaid - then stipple roll and let cure for 3 days - then apply OCR
I agree 💯 with you. That would be bullet proof application, but I wanted to test OCR as it is instructed on the bag, because they claim to be O-ne C-oat R-ender. Applying base coat 3 days ahead defeats the object of one coat. In that case just a traditional cement render could be applied(scratch coat and top coat , no need for mesh) . It would have been cheaper. OCR is good idea because it is saving labour cost on small job applications by completing it in one day
All the best 👍🙂
I am going to use rendaid and this weber one coat ocr on 130+ year old outside garden border walls. As you can imagine, very uneven surface, painted over the years.
Obviously will wash walls done with algae remover and ensure anything loose removed. Does the wall still need to be bonded prior to the Rendaid or will that be sufficient.
Thanks in advance
Hi mate great video… quick question… how would you waterproof this? From the rain.
Once fully set, it's weatherproof. Just make sure it doesn't rain on the day you're rendering
Hello, I am Khaled from Morocco. I am a skilled teacher in this job. I love him very much. I wish you success in your work. If you need a friend to work with you, I have more than 10 years of experience here.
Thank you Khaled, I don't need any help at the moment
I wish you all the best 👍🙂
Hi thanks for sharing great video , just wondered what the average time is from applying first coat to finishing floating as I'm thinking of doing some today many thanks
Depends on wind and sun exposure, about 4 hours
You mention working in Sussex, is that where you are based?
Yes I am 👍
Can you apply silicone render top coat on this material?
I don't really know, I've never done it
What are the meterage rates for applying that finish and is the big issue drying times especially in the winter?
It's about 0.9 m² per bag for about 16mm thickness. It should to be protected from direct rain and frost in first 24 hours. Also, with direct sun or wind you can spray some water gently over the surface to prevent rapid drying
@@mrfxr1695 I meant what £ cost per metre square for this product to the client, obviously if it’s a small area you’ll probably make it up as you go along or charge a day work rate.
@@Happytruth I don't have meterage rate for anything , and I assess every job individually depending on complexity, access, preparation needed, etc. Usually, on rendering, material cost is negligible
@@mrfxr1695 I usually play it like that also unless they are long or big walls with lots of metres.
I may try this stuff when I get my next inquiry, suppose if you can spread ordinary sand and cement this must be easier.
@@Happytruth spreading is as easy as regular stuff
If you did that bad a job in the 70s or 80s you would have been thrown off site
Thank you 👍