I've just emptied my sitting room, in order to sand the floor and decorate. There are some lengths of floorboard that I've previously had up, by cutting our the tongues. There's now a raging draught through the gaps (suspended floor with air bricks underneath). Does anyone have any suggestions how I could fill the gaps in such a way that I could still remove the boards if required? Permanent solutions like glueing in slivers of wood, or string, aren't appropriate. All I've come up with so far is taking them up, and running a bead of silicone along the edge of the adjoining boards, letting it go off before refitting my loose boards, to act as a kind of washer.
Cheers Richard