Our kitchen was extended before we purchased the house. The extension was then Marley tiled to match existing. By 2001 the Marley tiles in the extension were "bubbling" so we removed them and re-screeded the area. We then put a good quality vinolay down. In 2003 we noticed a small, dark spot which we tried to remove, but this has now spread right across the line of the extension, ruining the vynolay. We assume that we need some sort of sealant before laying new flooring. Can you help please? (A carpet fitter we spoke to said he thought the Marley tiles had been laid with bitumen and it would keep coming through - is this right?)
Thank you

John Hobart, August 2008

the dark patch isnt damp is it? Because of it only being were the extension is it does sound like damp. If it is you will need to DPM (damp proof membrane) the floor which isnt cheap a good floor layer can do this for you?

liam, October 2008

i would take up the lino and wash the back of it . and go to the hardware store and get a large rool of plastic sheeting, and cut it the same shape as the lino and put it under the lino , and see how you get on , and see if the plastic sheet will hold the dark spots back , it should " good luck mick..

mick, September 2008