I have approx 25 mtrs to cover.The walls are of brick construction ( 1936 ) and in sound condition. A doorway and window have been blocked up using celcon blocks. I intended to rend-aid the blockwork and when ready, render the lot with OCR. However,the guy at Weber says i should mesh where the block/brick meet and rend-aid everything to make sure. Is this to cover their arses as the brickwork is sound or simply good advice ?
WEBER OCR ( advice wanted )
- Thread starter bill
- Start date
- Status
warriorupnorth
Private Member
Good advice . always mesh where there is a change in substrate
plasterjfe
Private Member
mesh over the piece work as warrior says.
as for rendaid over the whole wall - what kind of brick is it?
as for rendaid over the whole wall - what kind of brick is it?
S a plastering
Private Member
if the bricks are fine i would mesh over where needed then tight coat over the lot then float over that rule off etc dont see the need for rendaid to be honest plus you have to give rendaid at least 4 days curing normally just scud it if your not happy weber ocr is only sand an cement in a bag and should be treated so
Last edited:
plasterjfe
Private Member
cant see why you would need rendaid myself its a porous brick in reasonable condition it dont sound like a tricky substrate, it wants rendering over eh thats what bagged render is for so just render it surely, you could price yourself out with the rendaid spec there. use hp12 instead of ocr its a bit stickier
pftmonojetman
Private Member
Dont know if you know Bill, the bloke at Weber will be talking about fibreglass mesh not eml, but if you already knew that just tell me to F''K off : )
S a plastering
Private Member
fk off lol only jokin mate
S a plastering
Private Member
ha ha it come out wrong that should be dont you dont need rendaid
plasterjfe
Private Member
simplybesty
Private Member
At the end of the day mate you have one chance to get the job right so why do what some say, by scrimping on meshing and rendaid. if you do as weber say then you have done all you can to the spec the manufactor stated. I always do full mesh and rendaid / cpi highbond on this type of job. It not only covers weber's arse mate but it cover yours as well.
plasterjfe
Private Member
weber wont be gauranteeing this at 25m sq I assume and Krend will spec you on a HP basecoat/mesh only saving on labour
simplybesty
Private Member
none of the manafacturers will back you up if the s**t hits the fan although Parex do
merlin
Private Member
weber will try to wriggle out of every situation if possible , they dont care for mono any more , they only interested in insulating systems now , krend dont give a sh@t either they will give you a spec on anything you want , do what simps says completely mesh and rendaid , you know its right then
plasterjfe
Private Member
it is right to follow the spec but weber have the incentive to sell more gear and I suspect ocr prob does need rendaid first because it is a very loose low end polymer where as krends highpolymer wont need any pre treatment as it is superior to ocr and will stick no probs onto that background
Render Systems
Private Member
parex and me would reccomend lanko latex in first pass to stop ghosting on the blockwork and mesh the substrate joints... however i would mesh the lot so no probs in the future
plasterjfe
Private Member
on 25 m you could use lankolatex in the one coat mix at full thickness, no point in doing a first pass on this measure
i use lankolatex an parmurex on scratchcoats over old masonry or brickwork for rendering on top of with parex monorex.
i use lankolatex an parmurex on scratchcoats over old masonry or brickwork for rendering on top of with parex monorex.
plasterjfe
Private Member
goody how is the XL performing
- Status