Im laying a floor in a part garage conversion (becoming a hobby room) ...as its an integrated garage it has concrete floor. Ive Put DPM down then 120mm Foil backed insulation , now partly laid with T & G chipboard on top. BI coming Thursday for 2nd check so havent glued any together yet. There seems to be different opinions and advice for/against chipboard...however it seems quite firm without any joists and there will certainly be no squeaks! Only just come across this Elastilon adhesive underlay for the solid wood and other flooring which looks quite good and a lot easier than nailing wood boards. Anyone got any experience of this stuff? Otherwise which glue is best for solid boards 18mm x 75 wide - do you glue undersides as well as edges? Thanks.