Originally Posted by
Tuerto
You'd be better off getting two prices, one to hack it all off (worst case scenario) and another just taking out the blown sections (that can only happen on full inspection-when the tubes are in place. Splotty gives some sound advice, if it's doing what it's supposed to do and it's sound then leave it alone. Blown areas can be cut around and hacked off, much less destructive than a mini breaker. I think that you'll struggle to get a meterage rate, most lads will work to a day rate and add a little on due to any nasties going on underneath the rendering. Don't go for a fine down finish if you can help it, it'll crack, nailed on, and it wont be the fault of the spread in most cases. Thermal cracking is a shitter for big areas, you can minimise the risk by adding mesh (stainless steel or fibre) to the backing coat and making sure that the boys use plastering sand, not building sand-SBR is a winner as well, apply render while it's tacky. In short, OPC is shit but cheap, it isn't forgiving or flexible on large panels, it wont compliment the differing weather conditions or allow for the moisture to leave. Best products are natural, Lime based. There's a place called Ty Mawr in Brecon that specialises in Lime render, take a look at their website.