Laminate flooring over 1930s quarry tiles

[Adrhammond]

I intend flooring with laminate over quarry tiles in my 1930s house. Please can you let me know whether it was common prcatice to intstall a damp proof membrane in these floors at this time . If no dpm is present what measures should I put in place to ensure that ther are no problems with damp .

[Ethel]

It was common to have no damp proof membrane in 1930s houses.

If your quarry tiles are absolutely level you could use this:
http://www.screwfix.com/prods/52649/Flooring/F looring-Accessories/Foam-Underlay-with-DPM

Or dig the floor out to make it comply with today's Building Regs, fill with hardcore, insulation, DPM and then concrete.

[The Builder]

good solution from Ethel :o)

just out of interest.................if you're going to cover them up anyway, lift a tile and poke about a bit..........there's a slim possibility they were laid in bitumen.........as an adhesive and DPM.............or, there could be bitumen under the screed below the tiles...........worth a shot :o)