Got a job todo in van gogh problem is hygrometer box is reading 97 so I need your advise on what dpm to use, am I correct in thinking creon will bring the reading down and can I creon then 1k turbo over the top then latex, to be honest ive not got a great deal of knowledge of different dpm as all the old company would use is fball one, normally I would wait until almost dry but this is a new extention for a disabled bloke and they need it done asap so he can come home from hospital, typical builder cocks up the screed puts new one in and floorlayer is left to get over it
you cant mix and match. You could use just 1K turbo but need two coats. Just how new is the base tho? That RH is very high. The base needs to be left for a minimum of 4 weeks before ANY surface DPM can be used. Im going to guess with RH that high teh base is 2 weeks old maybe? Get some fans in there with heating on and window open .
Cheers the screed is just 3 weeks old they won't pay for 2 coats of f75 already tried that one but 1k is prob the way after the 2 coats have gone down does it have to be tested again with hygrometer box but won't be doing anything for couple of weeks then
got a job today 20 sm of LG series 5 to put down, subfloor reading 90% Rh small 3 sm of concrete the rest is floorboards. Some idiot builder put down some concrete to level the floor for a kitchen and built it up by 15mm, now i've got to 1k turbo and 3mm screed then also put down 12mm ply and scrim all because he didn't want to wait a week for us to go in and do it right, hell of a step into kitchen from hall once it's done. :knob :cry
yeah always test after dpm installed, otherwise you're guessing that it's below 75% probably is but worth checking
If the DPM (surface) is installed correctly with no pin holes then you dont need to test, if it has pin holes etc then the dpm wont be working so no point in testing as you know it wont be working. IT WILL BE below 75%. It will be a lot lower than 75% in fact. Once a surface DPM is applied it allows moister to escape at a very reduced level. Gets complicated so not going to go into it as its very hard to describe without diagrams of how the moister is controlled. Will upload them when im at the college next.
Just a thought, if the builder has used a normal sand cement mix at 15mm you may have issues. Especially if adding a moister barrier. Of teh top of my head i think teh minimum screed depth is 35mm on a bonded mix. If he has used a smoothing compound - ie latex plan for instance then it should be fine. But like i say a builders screed need to be defo deeper than 15mm.
He tells me it's got a membrane then the insulation then 85mm screed couple of hollows going up to around 100mm
Needs 4 weeks minimum before ANY product can be installed. Then do RH test to see if need two coats of one. PS, no matter what epoxy you use, almost all will require two coats as you always get a pin hole or two and it also always gets sucked into new screeds and becomes to thin. With 1K turbo you dont suffer this issue.
After the second coat how long can it be left before latexing (no one will be walking on it as customers are going away for 2 weeks and I'm the only one to have a key) or does it need to be latexes straight away
