Why do you need to find the source of the problem? Just show the customer the readings and explain the possible reasons but don't waste too much time on it. It's very wet, smack down a double dpm, fit the floor and collect your cheque.
One for Matt! Speaking to a guy today from Protimeter ( Philip Leach ) nice bloke, took time to talk , sometimes rare these days, he was explaining the standards astm & bs. If you are testing to astm then they say the humidity sleeves are to be used , i assume astm is american? However bs say a humidity box is to be used . Surely taking a reading within the slab will give a better reading. Kind of like the wagner rapid rh gismo. What do you think?
I read the other day that a hygrometer shouldn't be used over power floated floors as the surface holds back the reading?
Exactly mate! Thats why i think its better to drill and test below the surface, avoiding pipes i might add If its ufheating then u got no choice but to use a box.
To BS a RH needs to be taken using a hygrometer.. Both a box and drilled plug work by taking a rh reading. The hygrometer can be digital or analogue . These been both classed as a hygrometer. So you can use either.
Both have there advantages and disavantages. Hydro hood - + None invasive (no damage to subfloor) - Can be knocked / damaged easy Hydro Plug- + Hard to damage - Invasive ( damage left to subfloor)
Just been round to the customers house and taken a reading on this floor . It reads 96.2 rh. Oh dear! Used the sleeve method in the end witch i put in on Thursday. Now the house next door was built at the same time and thats dry. The floor is covered with laminate , then foam ulay , then vapour barrier , then self sticking tiles ontop of marley tiles. Iv'e now exposed a bit more of the floor and going back on thursday to test again.
