lifted laminate and i have a Damp concrete subfloor

Hi all,

At the request of dazlight I have been asked to postmyproblem on here.

The link to my problem is at:

http://www.diynot.com/forums/floors...nate-floor-and-the-subfloor-is-sodden.330829/

Apologies if links to other forums are not allowed. I am posting on y phone so copy and paste won't work.
If I have broken rules I will copy and paste I in the morning.

Link contains description, pictures and background info of problem.

What are you guys thoughts?

Thankyou

 

I can confirm this. Had a look at the pics and IMO no dpm under the subfloor. The sheet under the laminate has made the floor sweat.
What do you think guys?

 

that's rising damp mate, need to dig up subfloor new concrete base, dpm leave 30 days then screed and surface membrane that should help fix the problem. You could asphalt but it will eventually fail one day and you'll need to do it again although it is the cheaper immediate option. also see if you can get a decent gardener look at the outside see if it needs to be re-graded and also check your brick doesn't require re-pointing that can be a massive contributor.

 

Ok Matt, thanks.

Ill copy and paste to this forum Aswell in the morning as top avoid cross posting and confusion.

Regards

 

Yikes........ is there anything that can be done that's less destructive and costly?

damp proof paint/resin applied or such?

 

no sadly not if it is defo rising damp it will push anything without weight back up either curling, cracking etc... the water will find a way through hence the weight of concrete is used to hold the dpm in place or the weight of asphalt is used to stop the water rising. I highly doubt it's as simple as a burst pipe otherwise you'd have noticed it in your water bills, sorry mate.

 

doing it on both mate

 

I meant trap moisture by sweat. Prob not the right way to work it. Seen this on a few jobs in the last few years when I've taken laminate up with a dpm sheet underneath.

 

or in my crack like on the course, sticky

 

ok thats not sweating ,there is water penetrating from somewhere either a leak or from outside.

 

Looks like a leaking pipe, is the pressure stable on your central heating boiler? Your radiator pipes look like they are fed through the wall, it could be possibly leaking behind the plaster and down onto the floor. I wonder if when the laminate was in installed and skirtings refitted, there has been a nail driven through the pipe where it enters the wall.

 

Hello,

My central heating is under pressure fine, no drops in it at all.
I replaced all the Cooper pipe on the lower floor and run it all above skirting board level (which I also installed from new)
So I can all but rule out leaking ch pipes.
I have Cooper pipe under the floor across the kitchen to living room door way, and that's the only original pipe work that I didn't replace, but again my ch pressure is unaffected.

So unless is a Mains water pipe, but from where my Mains tap is and the service point in the path outside the house its nowhere near my living room, unless they took am almighty detour.

 

The pipe that runs under the floor is for the ch, and links the kitchen rad to the living room rad.

The hot water pipe work (hot taps) are no where near the living room

Or have I misunderstood what your saying?

 

If moisture is rising for a few years and can't get out which is what might have happened. Then I would take the tiles up wait a month so floor can dry then take some damp reading.