Hi , always used latex for jobs eg tremco or screed master ultimate , but wouldn't mind using water based for a smoother finish, what meter do I use for the damp test? To give me the go ahead to latex? Does it matter or do I have to use a protimeter and get the green light! Any help
I use one of these and either drill and plug or use a hygro hood with it End time: 8 Feb 2015 15:40:48 Item: Protimeter MMS Moisture measurement system URL: http://pages.ebay.com/link/?nav=item.view&id=261755450172&alt=web[/QUOTE]
Do I need the boxes n drill things , or can I just use a mini protimeter to see if it's damp? If it's ok just carry on ? Or do u leave boxes on every job?
Protimeter mini is fine for wood but not concrete. The pins only test the very surface and give no indication of how much moisture is in the slab
If your using a pin protimeter it'll just show its surface dry or damp not how much moisture is the concrete. you need either hygrometers or plugs which will show you the exact moisture RH in the concrete.
So the answer is every job I have to test and leave a box down for 3 days to see whether I can use waterbased??? if that's the case I think I will carry on with the cheapest latex around !!
Get a tramex cme or a protimeter survey master. These scan 20/30mm deep. If it shows dry then no need for a box. If borderline or damp then defo boxes / probes needed. If you can save up then get the tramex cmex kit or the mms kit. Well worth the money
By the sound of it you need seriously educated mate A moisture test tells you if you need to use a dpm on the slab NOT what screed you can use ?
Only reason I say is that all the jobs we have ever done have only used latexed based compounds that have never failed ! So never use a damp tester. I'm forever scraping up previously laid warerbased products up that is all, jobs just seem to survive with a cheap latex product that's all
Screed master ultimate isn't effected by moisture I use it quite a bit perhaps use the 300 on newer houses that are pretty much likely to be ok Edit ....didn't realise it was karndean ( test every time !!!) must admit I never used 300 but have seen a builder put it down in a w/c and it was like glass
Was just the damp issues that's all the old bitumen adhesives etc , as with the moisture tolerant latex they stay down, and normally just lay stuff, maybe I have been lucky with no damp issues. That's why I was wondering about the damp testers for when using waterbased
