Good to know owen, does it say on the bag? Never used it. It's just general question Matt. What would use for filling a old mat well.
You can use what you like if the subfloor is free from rising damp and is below 75% RH if not you need to use a latex or Acrylic compound. A45 would be a expensive way of filling something that big. A45 is fine for small repairs. But dont forget that floors with rising damp are NOT guaranteed when using a surface dpm.
Yeah daz it does, its just the same as a45 but its for external and internal use and can be used under a surface dpm.
Matt, if anythings under 75% then surely you dont really need a surface dpm, which then means u can use any rapid repair, but daz was asking what (if any) rapid repair you can use under a dpm, i then suggested a46.... me thinks you got confused :lol: :lol:
Sorry mate, i ment A46. Typo on the A45. If installing a real wood floor then the subfloor needs to be below 65%rh which is near impossible to get. So basically when teh subfloor is dry enough to use normal compound (below 75%) then you can use a dpm to get it below the 65% needed for wood floors. Does that make sence or have i confused you all even more?
I thought you ment that mate just making sure haha, yeah i understand all that, Just a quick question matt, lets say im doing a solid wood installation, take reading it measures say 78%, would you rather use a surface dpm lets say 1k turbo, or would you use creom to drop the rh level to below 60?
Defo 1k turbo or another type of epoxy system. I like 1k turbo as it sinks into the screed and was originally designed for strengthening concrete. Just so happens that its also a dpm. The problem i find with other products is they tend to stick on the surface rather than draw into the screed. Due to this 1k turbo i believe is always going to be the stronger product. As for creom. I used to use this all the time. But with a bit of testing i have found that it only tends to lower teh RH. So for instance- if the subfloor is at maybe 80% then creom will lower it by say 10% so you end up with a subfloor at say 70%. If the subfloor was 90% then it would lower to 80% which is to high still. ( These are example figures, it could be more and could also be less. I never bothered testing further as telling people that it does "blah blah" on certain subfloors but not others will just confuse people ) I also tried it on my own floor where there is rising damp. Figured it would work as it sinks in? worse case it will blow the latex screed that was down which to me would prove it was holding back the moister which has caused the screed to blow. But sadly when i uplifted my vinyl the other day it was like the swimming baths. I had standing moister. Now if it was working it should of pulled my screed up or if the screed had bonded well it should of been bone dry? Hence i progressed into testing the stuff. well i say the other day above but i had peeked undo the vinyl a few months ago which started me off testing stuff. I now test every product that is given to me to see if it really does do what it says on the tin. Hence people who visit our training center often see some strange set ups that are my tests going on :roll:
I thought that would be your answer, so as a primer would you say creom is the best maybe or just on par with all the rest general purpose primers? Useful info there aswell thanks mate
