I did a few jobs in it years ago. One woodplank sold well. On the side of my van. God texture on it. Found when cutting it there was some white powder being released
Funnily enough I was going to post regarding their water based screed. I have to install a glue down wood floor in a small hallway where the builder has put down Cementone Cemolay in the centre third of the area. I was going to dpm and then screed with 300. As I was unsure of the strength of this screed I looked on their website for some technical information. There wasn't any so I rang their technical department. "Can you tell me the compressive strength and the flexural strength of the screed please?" "Er no sorry I'll have to ring you back on that" Fair play he did " The compressive strength after 28 days is between 20 and 22 N/mm2 but I don't know about the flexural strength" So not really all that technical then!! So it looks as if the screed the builder has put down will have to come up unless anyone has an alternative suggestion???
Always remove builders screed to be save They've normally used the wrong screeds for the sub or not primed ect...
Customer is insisting i use this as they've bought it so i spoke Bostick Technical services and they said it is good enough to use with lvts. I've already said i would prefer not to use it. What would you guys do. A disclaimer? Would you use it at customers insistence? Don't want to walk away from the job as it'll be a good earner. Just want a solution.
I would suggest a written contract that your fitting goods supplied by customer.. As bostic technical have already assured you that the product is suitable then you should be good to go. Rember that the customer bought the product themselves and if the screed were to fail then its up to them to claim of their supplier not you. Document what procedure's you use, primer ect. (ask bostic if the have a recommended preference get them to e.mail or fax it to you).
I've used it before and its not bad to be honest with you, mixes well and flows decently, has a NM strength of 19 i believe.
When going over an existing screed with a screed (say 300) that is going to have a glue down wood floor which is more important - the difference in compression strength or the difference in flexural strength?
id of thought compression strength, it needs to be high to stick the wood too but it cant be higher than what is down as it could shear off ie: ardex na currently down going over with k11 big shift in strength and could pull off. Matt showed us on the lvt l2 course a rebound hammer that tests the slabs strength, sounds like you need one of them unless you know whats already down or can get a sample sent off to test to be safe.
You should use your own screed mate, of its comes out ****e your kick yourself. How's it been stored...how old is it? Let them take it back. Unless they agree that if it goes tits up you will have to screed over with your own screed. Get it in writing....email
