Hi all,
Just wondering how strong cement and acryllic render are?
For example with a brick wall you can bounce a basketball on them, no damage!
What about a polyfoam wall that has been rendered, would it crack & break off if you hit it with a ball?
Browse Forums Renovation + Home Improvement 1 May 22, 2013 1:37 am Hi all, Just wondering how strong cement and acryllic render are? For example with a brick wall you can bounce a basketball on them, no damage! What about a polyfoam wall that has been rendered, would it crack & break off if you hit it with a ball? Re: How strong is render? 2May 22, 2013 3:03 am Our neighbor's son used to bounce his basketball on the rendered brick garage wall of the neighbor on the other side of them and it cracked the render quite badly, so I would presume it would be the same if not worse with a polyfoam product. Re: How strong is render? 4May 22, 2013 1:59 pm In our suburb a lot of the homes that are either new or have had a second storey added are generally rendered brick veneer for the ground floor then timber frame with rendered Hardies " Blue board " or poly sheets for the first floor. The poly sheets give good thermal insulation as well as being lightweight but are certainly not as robust as good old bricks and sand/cement render. Stewie Re: How strong is render? 5May 22, 2013 2:09 pm Yeah, but even cement render on bricks will probably crack if you throw stuff at it. Just the nature of how thick the render is I suppose? I'm thinking of having one part of the wall unrendered bricks for those purposes, but the other walls are in positions where they wouldn't be used for that. Out of interest does anyone know if the polyfoam/Masterwall stuff is better or worse than bricks for blocking out sound? Re: How strong is render? 6May 22, 2013 7:38 pm Quote: Yeah, but even cement render on bricks will probably crack if you throw stuff at it. Just the nature of how thick the render is I suppose? That depends so much on who renders the wall. Our old house here that will be pretty much demolished as part of our big reno was built just after the war and all the internal walls are rendered brick. I think the plasterer who did the house must have got a good price on the cement as it is the strongest I have seen in a long time. Any time I've done some minor internal mods I've had to break out a diamond blade on my angle grinder as a cold chisel and/or normal masonry blade just wont have any effect. Some other houses I've seen over the years you can run a fingernail down the walls and gouge out the render it is so soft. Stewie Re: How strong is render? 9May 23, 2013 11:50 am All render will crack if hit with a baseball bat. Sand cement render works diffidently to the acrylic render. Sand cement render will only adhere to a porous surface because of the way it works. It relies on the suction that forms when the moisture is drawn into the porous surface to hold it in place. Once sand cement render starts to crack or gets hit it will break the suction and slowly start to become "drummy" because the adhesion is broken. Acrylic renders or polymer modified renders are more like a glue they use chemicals to stick to the surface. that is why they can be used on polystyrene cladding's. The acrylic Renders themselves are not flexible. The acrylic Texture coatings that go on top are. As for polystyrene hitting it with a basketball will not hurt it once rendered. If you are based in sydney i have a showroom where i have a display set up and you can come and have a look at a rendered polystyrene wall and see for yourself. As for render thickness. They are about 5-7 mm thick unless it requires to be built up. They should have a fiberglass matting in them for strength Polystyrene has great acoustics value and is used for theater rooms quite often Its easy for a Tradesmen to take your money. Its even easier to do somethings yourself Re: How strong is render? 10May 23, 2013 12:11 pm ecofriendlybuildings As for polystyrene hitting it with a basketball will not hurt it once rendered. Do you mean the poly underneath will be okay but the render will probably crack? Obviously it depends how much/how hard you hit it etc I'm leaning towards bricking the garage and rendering the rest, so at least there is one of those walls. Hi Alex, Thanks for the reply again. I had a chat with the builder, he said he will use primer, then hydrotec which comes with colour and sealer as well. A Renderer I… 12 17981 I am looking for someone who might have tackled a similar issue as me. I have a few rendered interior walls, the surface condition is hardly flat. I can see all the bumps… 0 7937 |