which underlay?

Doglover88

going in a 1st floor maisonette, concrete floor with marley tiles on at present which i intend to go straight over with Quick Step Quadra laminate tiles, area of 32m2.
Was looking at quick steps combi underlay with built in DPM, about £20 roll which covers 15 m2 roughly. Or are seperate DPM and underlay 'tiles' better?
any suggestions or links greatly appreciated
glen

Doglover88

anyone?

aliasojo

I've recently used the combi underlay you mentioned above and was very pleased with it. Easy to lay and join.

Underlay tiles are also good but make the laminate fitting more complicated because of having to avoid joins falling on joins.

It can also depend on the type of existing tiles you have down.

Taken from Quick-Step site:

Which underlay to use on existing tiles?Do not forget a proper Damp Proof Membrane with respect to condensation. If the tiles and the grout joints are strongly profiled, or lie very uneven, it is best to install above the Damp Proof Membrane firstly Uni Softboard and on top of this the 3mm the Uniclic underlay. At flat, not profiled tiles, the Uniclic combi Floor or the Unisound combi Floor are sufficient.

http://www.quickstep.com/faq.aspx?ID=1&faqitemid=351#answer

If the tiles are flat, then personally I'd stick with the combi underlay.