I've sealed the gap between skirting and laminate throughout the whole ground floor of my house using silicone. Wood warps with age, and occasional chips or splinters can leave you with gaping spaces between your boards. Great and quite straightforward to use with a combination of their roller tool provided and a flat head screwdriver, so you can hold and stretch it slightly to help it fit. DraughtEx floorboard gap filler has been cleverly manufactured with thousands of tiny, concealed air pockets which allow it to be compressed by almost 90% of its original profile. They could tell you whether any gap filling insulation could wick moisture, affect the dew point etc.

Yes, my guess is that the gap is there for a reason and is to prevent the boards coming into contact with any dampness in the brick wall. Front door - taped shut and out of use, with a draught excluder, plus velvet curtains drawn fully across, and the letterbox has a flap cover both sides.These are gently knocked into place using a rubber mallet, then can be sanded down and stained to match the old boards.

Once the floorboard filler has been inserted into the gap it will expand until it fills the entire width of the gap. First, the wedges were put it - first fixings - then the bottom coat of hair plaster, then the finish coat and then as part of the second fixings, the skirting was affixed to the wedges such that it sat directly on the plaster.The ingenious design plugs gaps of varying widths between 1mm and 8mm and won’t drop out when the boards shrink in hot weather. Potential savings up to 40 GBP per room per year on energy bills and reduce CO2 contribution by around 110kg.