I'm going to sand and varnish the floorboards in our spare room, I have prepared the floor and made sure all nails and banged down etc, however I wanted to fill the gaps between the boards so I got some wood filler.
The stuff keeps falling between the cracks, even the small cracks, it's driving me insane, i would leave it but I'm terrified of spiders so want to block any way into the room!!!!
Any suggestions, please??!!!!!!!!!!!!