Hi,
1905 house with 30's kitchen extension. How best to put a new 'plastic ie. Amtico tiles on it?I put Amtico tiles down on the quarry tiles (with a levelling compound)
25 years ago with a bituminous adhesive which seems to have held. More laid 9 years ago with a contact adhesive have not and some have blistered. So quarry tiles by themselves do not seem to provide a damp course, what is under the quarry tiles is anyone's guess.Regards
Colin
One option might be to paint over an epoxy DPM, eg:
You need to read the instructions *well* and do exactly what they say.
However, you will have to get the bitumen off completely and nothing, apart from more bitumen ever sticks to the damn stuff.
Another option is to lay single sheet vinyl over it - the need for continuous adhesion is removed - it can almost be laid loose if you siliconed the edges to the skirting.
if you have damp, the underside will go mouldy over time but that should not be much of a problem.
If the quarry tiles are original, they will have been considered to BE the damp course back then. There may be brick or concrete beneath. Blistering is caused by water vapour coming up the joints between the quarry tiles. Traditionally the other possibility was wood blocks (permeable) Blistering happens when the floor finish is completely impermeable, ie won't let moisture underneath escape. It's worse if the room is warm. You could put down ceramic floor tiles, Very important you use a cementatious tile adhesive when damp is present. ie, the powder ones. The other adhesive, ie the jollop in a big tub, relies on the moisture being sucked out by a dry surface, hence never sets if the floor is even slightly damp. Contact adhesives don't stick well to damp surfaces. Hot bitumen drives the damp out for a while until it sets/sticks. That too was used as a DPC years ago. The only way you can tell if it's damp is with a dampmeter. (on the existing joints if neecassary).
If yo want an impermeable floor finish (plastic), the only sure way is to take the floor screed up &put is a DPM. A lot of work and expense.
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