Customer Support· 3 min read· By The SpideyChat Team

Door Clearance and Threshold Questions

A new floor raises the level and the doors stop closing. A checklist for the height questions that decide whether a job goes smoothly.


A customer has new flooring fitted throughout the ground floor. It looks excellent. Four internal doors now catch on it, the door to the downstairs toilet will not close at all, and the dishwasher cannot be pulled out for servicing.

Every one of those was foreseeable from a measurement nobody took.

1. Establish the existing floor build up

What is down now, including underlay, and what is underneath it. The new height is only knowable in relation to the old one.

2. Calculate the new height honestly

The flooring plus any underlay, levelling compound or damp membrane. Customers compare product thicknesses and forget everything underneath them.

3. Measure the door clearance before quoting

The gap under each door, now. Somebody with a tape measure spends five minutes and removes the entire category of surprise.

4. Agree who trims the doors

Whether the fitter does it, whether a joiner is needed, and whether it is in the price. This is the single most common extra on a flooring job.

5. Warn about fire doors

Trimming a fire door affects its certification and there are limits on how much can be removed. This is not a job for an improvised adjustment on the day.

6. Check external and sliding doors

Patio doors, bi folds and back doors frequently have very little clearance, and these cannot simply be trimmed the way an internal door can.

7. Plan the thresholds between rooms

Where rooms have different floor types or heights, a transition is needed. The type depends on the difference, and the choice affects appearance as much as function.

8. Cover the appliance clearance

Integrated dishwashers, washing machines and ovens sit under worktops with specific gaps. A raised floor can trap them permanently.

9. Check the stairs and the bottom step

A raised hall floor shortens the bottom step, which matters both for appearance and for whether the staircase still feels right underfoot.

10. Look at the skirting relationship

Whether skirting is removed and refitted, or whether beading is used. This is a visible finish decision and customers have strong opinions once they understand it.

11. Consider radiator pipes and vents

Pipes emerging from the floor need collars and floor vents need to remain usable, both of which are easier to plan than to correct.

12. Check the toilet and bathroom fittings

Raising a bathroom floor around an existing toilet or shower tray is where the awkward jobs live, and it should be identified before anything is ordered.

13. Ask about wheelchair and mobility needs

Thresholds and level changes matter enormously in some households, and raising a floor can create an obstacle where there was none.

14. Connect it to the product choice

Thickness varies considerably between formats, which belongs in the comparison in laminate, vinyl or wood questions flooring shops answer.

15. Raise it at the sample stage

Customers choosing from samples should be told the thickness implication then, which fits with sample and showroom visit questions from homeowners.

16. Collect the measurements at enquiry

An assistant that asks what flooring is down now, the gap under the doors, whether any are fire doors, whether appliances are integrated and whether anyone in the household has mobility needs produces a quotation with the trimming already in it. Handling questions about a household's circumstances needs the care described in how to handle sensitive questions in your chatbot, in the same way as entry policy and dress code questions.

17. What measuring first prevents

Four doors that catch and a dishwasher that cannot come out. See features, start at try, and the sector view sits under contractors.

Frequently asked questions

Will doors need trimming after new flooring?
Frequently yes, since a new floor with underlay is usually thicker than what it replaced, and internal doors are the first thing to catch.
Who trims the doors?
It varies by fitter, and it should be agreed and priced before the day rather than discovered when a door will not close.
What about thresholds between rooms?
Different floor levels between rooms need a transition, and the type depends on the height difference, which is why it is measured rather than assumed.

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