Hi all. Been to measure a job today that's had this screed installed over underfloor heating hygro box is down and reading 94 other areas are 0 The company's tested an area and says its dry to fit on this was installed beginning of Jan. The couple are saying to me to lay the flooring full stick down if they get a year guarantee from who installed the screed should I install it? As I'm worried from what my metres are saying. Also do you use a different Addy on this screed? Tia.
Think I'd be a little worried as well... The infamous company comes in tells you it's dry and if the floor pops,,,well, we didn't fit it! I'd be bending the ears of adhesive manufacturers.
Has the top been ground off? The company that installs the screed is meant to do it. I'd be worried if it's reading dry in most areas but very high elsewhere. I guess the systems been pressure tested and there's no weeps?
Wouldn't stick down if its reading in the 90s. It will drop down depending how thick it is and how long the ufh been on. Last few I've gone over have read in the 60s. Rewmar bonds direct to anhydrate but you obviously have to use acrylic primer first
Systems been up and running for 8 weeks. Doest look to me that its been ground off, I know this needs to be done but thought it was my job?
Should really be dry by now then? Is the ufh off when you take rh readings? That done me in a few times!
I don't know how but the one I had problems with was because the heating pushed loads of moisture into the hygrometers.I put them down after 50 days and the surface meter was reading dry but it was still soaking. Might be worth getting them to turn the heating down and putting a couple of new hygrometers down to be sure.
heating has to be off for a full 48hrs before hygrometers can be out down. there's no problem with anhydrite so long as you know how to prep it. and up my way the company's that install it NEVER strip the latience off the top, it's always us.....
Looking back at your first post, if the company's tested it with a carbide bomb test that is the preferred method for anhydrate apparently. If they will put something in writing that's great but anhydrate also dries out in patches so you can get dry and wet readings! Prepping it is easy but getting a true moisture reading is a pig.
same here buddy, down to me on each occassion, doesn't take too long - guess it depends on area & whether or not you've got a good Henry to vac the dust up!!!
lol I did have a Henry, but he choked to death on the fine dust :-/ have a metabo asr 2025 now I think it is and it does a brilliant job with concrete dust etc.
