Look for a wood filler with a label that indicates that it won t shrink or crack.
Filling large gaps in hardwood floors.
Water logged wood will first swell then shrink as it dries out.
Over time however the putty hardens chips and flakes.
Choose a wood filler with a thick putty like consistency if you ll be filling larger gaps.
Putty fillers were once a mainstay of hardwood floor repair.
In many areas the filling looks pretty good however over the years the filling in some areas had is cracked and crumbled away.
There are many different ways to go about correcting this type of issue but we will dive into the most common.
The problem is magnified when the boards were not tightly laid in the first place.
Filling large gaps in old wood floors if you cannot fix the problem by installing a humidifier you may need to take more drastic action when it comes to filling wide gaps.
Use a solvent based filler if your wood floor is subjected to large swings in humidity and temperature as solvent based fillers are more durable than water based fillers.
Filling huge gaps in hardwood floors i have a 1905 house in boston with hardwood floors which have large cracks in them that were filled many years ago.
Why you should avoid putty fillers.
This type of cracking is considered normal for hardwood and no filler method will hold up unless the proper humidity is maintained.