What to fill floorboard gaps?

[Jon O'Neill]

Hi, I have some thin gaps between my floorboards which I want to fill, the gaps have been previously filled but due to them being the boards which move a little when stood on I think the filler has fallen through. What brand, name of product is good for this? The previous owners have used a hard filler with seems to be fine, but I don't know what it is (pictured)

 

[blup]

If they're upstairs and not causing a draught consider whether they really need filling, it's a tedious job and the boards look good as they are

The traditional way was to mix pva and sanding dust but proprietry fillers are available like bona fix and fill:

https://www.wood-finishes-direct.com/product/bona-mix-fill

It needs to be mixed with sanding dust to work.

There is no guarantee that the filler will remain in situ when repeatedly walked over, that's how the previous filler may have disappeared.

Blup

 

[foxhole]

Boards don’t require filling , why would you want to?

 

[Jon O'Neill]

Boards don’t require filling , why would you want to?

Room gets very cold in winter as there is a cellar underneath. And there are loads of cracks/gaps!

 

[foxhole]

Put a carpet down , insulate cellar ceiling .

 

[pilsbury]

Several ways I considered when doing mine.

1. Bona mix and fill. As already stated, you use clean sanding dust to mix in with it.

2. Slivers. Long, thin wooden slivers slightly wedge shaped. Glued and hammered into the cracks. Then chisled off and floor sanded.

3. Cork slivers. Similar to above

All really require you to be renovating the floor. You might get away with the cork if not.

 

[endecotp]

Room gets very cold in winter as there is a cellar underneath. And there are loads of cracks/gaps!

Take down the cellar ceiling (plasterboard?), fill between joists with mineral wool insulation batts, replace plasterboard.