With older tongue and groove hardwood or even wide plank floors gaps inevitably develop between the boards mostly because the wood shrinks over time as it dries out and loses moisture content.
Filling large gaps between skirting boards and floor.
Or if your house is masonry and old the gap could be the result of floors supported on piers subsiding independently of the walls.
Another exacerbating condition is water damage.
This gap is best covered by a quad moulding fixed to the floor that can slip up and down the skirting as the floor moves between wet and dry seasons keeping the gap covered.
I m one step closer to.
Water logged wood will first swell then shrink as it dries out.
The size of these gaps often vary and traditional gap filling techniques and products are time consuming messy to install and will often fall out over time.
In my house i went round all the rooms with silicon and filled under the skirting boards made a hell of a difference.
The problem is magnified when the boards were not tightly laid in the first place.
Skirting boards often have a gap between them and the floor which can create cold draughts and lead to chilly and uncomfortable rooms and increased heating bills during the winter months.
Was going to say either it was a poor build or the floors have moved and should be investigated if the gap was 1 inch.
Today finally sealed at least some of them.