Hello guys. I am having a problem fitting 2 lengths of 18mm chipboard. It is replacing 2 lengths of 20mm chipboards. I bought some 2mm packing pieces but I think the tongue and grooves don't line up properly. Should I just cut the tongue off ? Any information will be very much appriciated. Thanks.
nope! T&G is that and if any area isn't interlocked it'll be a problem or will become a problem. Would suggest using a skill-saw and a router to adjust the tongue's, but way cheaper and quicker to find and replace for identical boards, that where removed. Try Jewsons, Travis Perkins etc