Greater London · England
New Barnet Floor Joint Sealing
Problem with your floor joints in New Barnet? We cut out the old, prepare the joints and apply the right sealant.
- Chipped and open joints in warehouse floors
- Failed seals where bathroom floors meet baths and panels
- Skirting caulk that keeps splitting
Floor joint sealing for homes and businesses in New Barnet
Gaps along the bottom of skirting are common in new and older homes alike. Decorators’ caulk usually cracks where there’s movement, so we use a flexible sealant that moves with the floor. We work on tiled floors, skirting boards and wet room & bathroom floors, and common reasons people get in touch are gaps between floors and kitchen plinths and grout used at the floor edge instead of sealant.
Across London, commercial floors have movement joints that break down under heavy foot traffic, while new homes need a neat, sound finish around frames, baths and kitchens before handover, in New Barnet and beyond.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- New Barnet (EN5, EN4, N20)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
Every visit runs the same way: we look at the joints together, mask and protect the surrounding surfaces, do the work and tidy away. It usually takes a few hours, depending on the length of joint. For a job in New Barnet, parking and access are the things to plan: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We clear the edges of the floor so the joints are easy to reach.
- We take out the cracked caulk, grout or old sealant.
- We clean and dry the edges of the joint.
- A flexible sealant suited to the floor is applied and tooled.
- We check the joints and explain the aftercare.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Try not to wet indoor joints just before the visit
- Mention any tricky access
Get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will talk you through the work and send you a clear quote.
Advice
Common questions in New Barnet
Is parking an issue for floor joint sealing in New Barnet?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
Can you do floor joint sealing in New Barnet?
Yes, New Barnet is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or drop us an email and let us know what needs doing.
Do you hold any approvals?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long does the job take?
A typical job takes a few hours, depending on the length of joint. We’ll confirm how long when we quote.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. Then call 0345 464 0079 or drop us an email.
I’m a tenant. Can you help?
We’re happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
What do you put in the joint?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Why has a gap opened under my skirting?
Floors and walls move a little with the seasons, and new floors settle. We close it with a flexible sealant that moves with the floor.
Also near New Barnet
What else we do in New Barnet
Why it’s worth doing now in New Barnet
Water that gets past a floor joint can damage the floor beneath. Dealing with it early keeps the repair to the joint. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Instead of a standard rate, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Why choose Mr Mastic in New Barnet
- Approved under the ARBOMaster scheme
- Fully insured
- Trusted Arbo and Everbuild sealants
- Tidy, careful work
Take a look at what affects the cost and customer reviews.
Landlords, agents and businesses in New Barnet
Letting agents and landlords in New Barnet can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
For anyone letting property in or around New Barnet, several properties can be quoted together. Send us the addresses and the work at each, and pictures by email help.
Aftercare tips
Simple care keeps the joints in good condition. We recommend:
- Use furniture pads near skirting
- Look at floor joints each spring
- Have a cracking tiled floor checked before tiles break
- Vacuum floor joints regularly to stop grit building up
Check the joints after the first winter. If anything has opened, it’s easy to reseal before they spread.
Open skirting gaps let in draughts, dust and sometimes insects. Sealing it keeps the room tidier and stops it getting worse.
How the job changes by surface
Commercial floors
Commercial floors take more traffic than most homes. We talk through the traffic and choose a sealant suited to it.
Wet room and bathroom floors
In a wet room, the floor-to-wall joint is a key line of defence. It’s resealed with a sanitary silicone, and we will tell you if the leak seems to come from elsewhere.
Joints and finishes in New Barnet homes
Floors around Greater London run from suspended timber in older homes to concrete in newer houses and units, and they do not all move the same way. That is why the skirting and threshold joints need a flexible seal. Much of London’s new housing is flats in larger developments, where snags may need reporting through the developer or the managing agent.
If you look after a church, hall or community building such as Holy Trinity Lyonsdown, floor and skirting joints in halls and kitchens wear like any others. Schools such as St Mary's CofE Primary School are buildings too, and floor joints in corridors, halls and entrances take heavy wear and need resealing before the edges break up. As a London address, New Barnet can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
New Barnet is about 1 mile east of Barnet, in Greater London. New Barnet gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 764 places across Greater London, large and small. For nearby work, see our London page, about 11 miles away.
Here we cover the EN5, EN4 and N20 postcode area for floor joint sealing. That includes homes and businesses on York Road, Park Road and Henry Road and the roads around them. Neighbouring places we cover for floor joint sealing include Barnet (1 mile west), Cockfosters (1 mile north-east), East Barnet (1 mile south-east), Underhill (1 mile west) and Whetstone (1 mile south). Larger places within reach include London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (8 miles south) and Shoreditch (9 miles south-east).
What’s near New Barnet
Typical jobs here are in homes near Trent School Cockfosters, East Barnet School and The Alexandra pub and the streets around them. New Barnet has its own railway station: New Barnet station. Other landmarks nearby include Spires Shopping Centre (1.6 miles north-west) and Francis Skaryna Belarusian Library and Museum (2 miles south). Not far away are Greenhill Gardens and Darland's Lake.
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Tiles that have lifted or broken
- Floors that are uneven or need levelling
- Structural movement or subsidence
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer.
Joints and surfaces we work on
- Concrete floor joints
- Commercial floors
- Wet room & bathroom floors
- Thresholds
- Skirting boards
- Tiled floors
How we quote for floor joint sealing
Call for a quick quote. The main things that affect it are:
- When we can work, for business premises
- How much old sealant there is and how hard it is to remove
- Any mould that needs treating
- The number and length of the joints
Doing several joints on one visit is generally more efficient than separate visits. You will get one clear quote for the whole job.
Asking for a quote
Photos help, but a description is a good start. Try to tell us:
- A few pictures by email, if you can
- Any access issues, like height or stairs
- Roughly how big the job is
- What the problem is, such as mould, gaps, leaks or cracking
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.