Had the mention of a job in a school where they've built and extension over some large paving slabs, converting outside space to inside space. The suggested prep work was a couple of coats of NA then a DPM then another screed. It sounds reasonable to me as long as the slabs aren't moving ofcourse but what do you guys think? It's a new one on me.
I would have thought dpm sheet, 50mm sand/cement/fibre would be better. A38 would be ready to lay on next day
Not sure what a38 is? They want a quick turn around so using concrete won't be doable over the holiday I guess
A38 is concrete. Mix with sand, lay at 50mm, dry to fit your floor/latex next day. We do this regularly, its a fast track system
Oh right... Well that's what's needed clearly. Guess they're trying to save some money or something. Whatever, doing a proper job with concrete and a physical membrane is just logical building process...
What's going down? I wouldn't be just slinging NA over it lol Exactly as Neil has said base it with A38. Depending how big it is then be prepared for what seems like endless mixing
polysafe wood fx with acoustic backing, roughly 80m2. I guess acoustic because the children are autistic. Don't think i want to do this work. Atleast i can say exactly why and can 'advise' how it needs to be done...
If the pay is right then crack on mate. Aslong as they go down the route you will put to them. Just get a few lads each with a bucket and do continuous mixes (if pay allows) if it's for a firm then get them to send a couple labourers with you.
I would just get a screeder to do it. He will have a pan mixer, and a pump, then its not such a job. Depending on time constraints, you could use standard screed. This could be delivered pre-mixed in ton bags, and dropped close to where you need itwith a grab, or on the back of a tipper, and dropped onto a plastic sheet. Your looking at approx 1mm per day drying time
Try Softlay foil goes upto 95% rh and can be either used over screed and screeded over ! May help speed up things etc, been used recently for an outside space and worked a treat,
I'd go route neilydun said personally, way I'd look at it is the slabs are probably direct to earth and could cause a failure, it's not what you could earn on job but what you could lose if not done right first time
