Doors Catching After a New Floor
Why doors stick or catch once a new floor goes down, and the straightforward fix for it.
It's one of the most predictable side effects of changing flooring type: if the new floor is thicker than the old one, doors that used to clear the floor comfortably can start catching or dragging across the surface.
It's a minor job in isolation, but it's easy to overlook if it isn't planned for before the new floor goes in — which is why we check door clearances as a standard part of any fitting quote.
External doors deserve a specific mention here too, since they often sit on a threshold with weatherproofing seals that shouldn't simply be planed away in the same manner as an internal door — any adjustment to an external door needs to preserve its weather seal as well as its swing clearance.
Why doors start catching
Every flooring type has a different overall build-up height once you include underlay, adhesive or subfloor prep. Moving from a thin vinyl to a cushioned carpet, or from carpet to engineered wood with underlay, can add several millimetres — enough to turn a comfortable clearance into a persistent catch.
How we check for this before fitting
- Measure the existing floor build-up and the new flooring's total height
- Check clearance under every door affected by the change, not just the obvious ones
- Flag doors that will need trimming as part of the original quote
Fixing a door that's already catching
- Planing or sanding the bottom edge of the door to restore clearance
- Re-hanging the door slightly higher on its hinges if only a small adjustment is needed
- Trimming and re-sealing the door's bottom edge to prevent moisture absorption after planing
What to check before trimming a door
It's worth checking whether the door is fire-rated (common on some internal doors in flats and HMOs) or has an intumescent seal, since these need particular care when trimming to maintain compliance. We flag this during survey rather than assume every door can simply be planed down.
Avoiding the problem next time
When we plan a flooring job that changes the overall floor height, we build door adjustment into the schedule from the outset, so it's done in the same visit rather than becoming an afterthought once the new floor is already down.
Alternatives to trimming the door itself
In some cases, rather than trimming the door, it's possible to reduce the flooring build-up locally at the threshold, or fit a lower-profile transition strip, avoiding the need to alter the door at all — this is worth considering on doors that are expensive to replace or original to a period property.
Where a door has already been trimmed multiple times over the years by successive flooring changes, there can come a point where the door itself needs replacing rather than trimming further, since removing too much material weakens the bottom rail and affects how the door hangs.
It's also worth checking cupboard and cabinet doors near floor level at the same time as room doors, since a change in flooring height can occasionally affect fitted units as well, particularly in kitchens and utility rooms where cabinetry sits close to the finished floor level.
Frequently asked questions
- Is trimming a door a big job?
- No, it's usually a quick job done with the door off its hinges, taking off a small amount from the bottom edge and re-sealing it before rehanging.
- Will every door need trimming when I change floor type?
- Not necessarily — it depends on the height difference between the old and new flooring, and the clearance the door had to begin with. We check each door individually rather than assume.
- Can fire doors be trimmed the same way?
- Fire doors need extra care, since trimming too much can affect the seal and compliance. We identify these during survey and adjust our approach accordingly.
- Can this be sorted on the same day as the flooring fit?
- Yes, in most cases we can plane and adjust affected doors as part of the same visit, provided we've identified the need during the initial survey.
Keep reading
Why threshold strips lift, trip or gap between rooms, and how to get transitions between floors right.
Why timber floorboards squeak or feel uneven underfoot, and how we sort it before new flooring goes down.
What it means when our survey uncovers a damp or uneven subfloor, and how we prepare it properly.
See how we survey, prepare and fit LVT across Kent.
See how we survey, prepare and fit carpet across Kent.
Talk it through with a fitter, not a call centre
Book a free, no-obligation survey with Kent Flooring Warehouse's in-house fitting team — call 07702 737267 and we'll inspect the floor and give you a straight answer on the fix.