Was at a customers house today preppin their new open plan kitchen and was using Fballs f77, The son who was there was telling me about when they had their lounge done and the flooring firm used a epoxy dpm then had to go over it the next day with another dpm but was the roll on system...he was asking me if it was right to do that because they are concerned they still having a damp issue and it's starting to smell of damp some mornings so asked me if they could have a 3rd coat on I've never had to dpm twice let alone 3 times but looking at some spec sheets from these manufacturers they say it can be done twice but using same and not the roll on system over an epoxy??? Guess it would act as a beefed up primer but never heard of anyone doing that or had to.
If the first coat shows pinholes or sub floor is very absorbent so causing a subdued shine then a second coat is necessary. Never seen/done the roll on stuff over epoxy tho Sent from my iPhone using Tapatalk
Eopxys are trowel then rolled not just rolled If he thinks he can smell damp from the floor some thing is seriously wrong
Yeah this is what I mean but the roll on system he talking about that they put on top is straight out the tub he couldn't remember the name of it but said it was blue out a big tub so I'm guessing mvs
If the floor is damp it needs a new floor not just a liquid dpm doesn’t it? And if he can smell damp I’m surprised he has any flooring still attached to the sub floor
All depends on the water table but I’ve pushed DPM1c to the limit and it’s worked. But how thick did this fella put it on. Needs to be on 350 microns. Which is a B2 notch. Then roll it.
Probably a case for flooring grade asphalt instead of a surface dpm. Sent from my iPhone using Tapatalk
From what it sounds like they put the same down what I was doing whether it was f77 or 1c then rolled over it the next day with a roll on dpm out the tub. I'm back there today so going to ask him. They want me to try and sort whatever issue it is with their lounge but that depends after I've done some tests. Not sure if I want to get involved with it tbh
This is what ive suggested on another job of mine that's going on. Bungalow has no Dpm at all but they on a time scale so I told them to get it all asphalt whilst the builder can do it else they'll have to wait till and of Jan before I can start it.
The fact that he thinks he can smell damp in the morning does automatically point at the source of the smell being the floor. It could be a poorly ventilated room that accrues condesation through the evening and the damp is in the walls. Just a thought.
Had another chat with him and he said they used a dpm that was 'scraped over the floor then used paint roller to spread it' < his words so id say they used the epoxy troweled on then rolled as standard then next day they opened a tub of 'blue stuff' and rolled it over again and told him it was a 'quicker method'... So they used for example mvs on top of 1c
They had it damp proofed becuase the carpet was moist in places and started to smell. Its been fine for over a year but the smell has slowly started to come back but no stains.
Worth looking at the outside walls of the room as well. If there is a path, drive or flower bed as high or higher than the brick dpc it can wick through. Also look to see if they've covered up any air bricks Sent from my LG-H850 using Tapatalk
