Greater London · England
Northfields Floor Joint Sealing
Problem with your floor joints in Northfields? We remove the old material, prepare the joints and seal them properly.
- Open gaps along the bottom of skirting boards
- Concrete floor joints that have broken down
- Open joints that fill with dirt
How we handle floor joint sealing in Northfields
Where skirting is painted, we can use a flexible sealant that takes paint. For bathrooms and kitchens, silicone is generally the better choice. Common call-outs are for skirting that has pulled away from the floor and open joints around bathroom floor edges, on concrete floor joints, skirting boards and commercial floors.
Shops, offices and commercial units across London have hard-wearing floors with movement joints that need resealing as they wear, and new homes need their plot mastic finished properly before handover, in Northfields and beyond.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we will sort it.
- Where
- Northfields (W5, W13, TW8)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Floor joint sealing around Northfields
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. Floors around Greater London run from suspended timber in older homes to concrete in newer houses and units, and they don’t all move the same way. The joint at the skirting or threshold has to allow for that.
As a London address, Northfields can be tricky for parking: let us know about parking bays, permits or a driveway. For landlords with property near Brentford station, gaps at skirtings and thresholds are worth sealing between tenancies.
Northfields is about 1 mile south of Ealing, in Greater London. For floor joint sealing in and around Northfields, please phone 0345 464 0079 or send us an email for a quick quote. We cover Greater London from our Crawley base, Northfields included. Our Greater London coverage runs to 764 places, Northfields among them. You can also see our page for London, roughly 9 miles from Northfields.
Every address in W5, W13 and TW8 is within our area for floor joint sealing. If you need floor joint sealing at a property on Burns Road, South Road and Elers Road or anywhere close by, our applicators can take on the job. Being close to the A3002, Northfields is easy for our applicators to reach for floor joint sealing. Nearby, we also carry out floor joint sealing in Brentford (1 mile south-east), Gillette Corner (1 mile south-west), Brentford End (1 mile south), Osterley (2 miles south-west) and Spring Grove (2 miles south-west). Further out, we also cover London (9 miles east), City of Westminster (7 miles east), Marylebone (7 miles east), Kensington (5 miles east), St Pancras (9 miles east) and Shoreditch (10 miles east).
Local landmarks in Northfields
In Northfields, that means homes and buildings near Ealing Fields High School, Great Ealing School and Ealing Park Tavern. You will also find Library for Iranian Studies (1.8 miles east) and Lammas Park (within half a mile north). For rail, the closest station is Brentford station, roughly 0.8 miles south of the centre. A little further out are Gunnersbury Park House - Large Mansion (1.2 miles east) and Treaty Centre (3 miles south-west). Green spaces nearby include Middle Lake and Long Wood.
When it is not the sealant
In fairness, there are a few things sealant will not fix:
- Damaged concrete that needs breaking out and repairing
- Subfloor problems that need a flooring contractor
- Tiles that have lifted or broken
Not sure which it is? You can call 0345 464 0079 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Tiled floors
- Concrete floor joints
- Skirting boards
- Commercial floors
- Thresholds
- Wet room & bathroom floors
The process
There isn’t much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a morning or an afternoon for most homes. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- The room is cleared along the joints so we can reach them.
- Old material is removed from the joint.
- We clean and dry the edges of the joint.
- A flexible sealant suited to the floor is applied and tooled.
- Finally, we check the work and talk you through aftercare.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- Mention any parking rules near the property
- Move anything stored near the joints
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Northfields questions
Can parking be tricky for a visit in Northfields?
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.
Do you work for landlords with property near Brentford station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Can you add a movement joint to a tiled floor?
Often, yes, at the edges and along suitable lines. We remove the grout and seal the line with flexible sealant, giving the floor room to move.
Can new sealant go over the old?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Are you fully insured?
Yes. We are fully insured.
Do you seal floor joints in bathrooms and kitchens?
Yes. The old joint comes out and a flexible silicone replaces it, colour-matched where it shows.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
What affects the cost of floor joint sealing
Call for a quick quote. What matters most is:
- How many rooms, windows or areas are involved
- Any working-time requirements on site
- The product the joint needs
- Whether there’s mould to deal with
The cost depends on how much there is to do, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
What we need to know
To make quoting easier, let us know:
- How we’d reach the joints
- A few pictures by email, if you can
- If it’s domestic, commercial or a hotel
- The rough size of the job
If you are in Northfields and need floor joint sealing, phone 0345 464 0079 or email us. Tell us what the problem is and where, and we’ll agree the price before any work begins.
For landlords and businesses
Letting agents and landlords in Northfields can book us as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
We also work for property managers and facilities teams in Northfields and across Greater London. Several sites can be quoted together, and we’re fully insured for the work.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Use a well-wrung mop rather than flooding the floor
- Look at floor joints each spring
- Check the sealant is paintable before decorating
- Act on grout cracks that run in a straight line
Keep heavy traffic off resealed concrete joints for the cure time we give you. Mark the area off so drivers avoid it until it’s ready.
A tiled floor that cracks along a line will keep cracking until it can move. Adding a movement joint early can stop cracks spreading to the tiles.
Leave it or put it right?
Caulk is quick and cheap, but it cracks where the joint moves or gets wet, so the gap reappears. A flexible sealant moves with the floor and keeps the joint sealed. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and give you a clear quote before we start.
Why choose Mr Mastic in Northfields
- White, clear, grey or another colour, product permitting
- Trusted Arbo and Everbuild sealants
- 4.9 on Google from 180+ five-star reviews
- We agree the colour with you first
Read our cost guide or what customers say.
Places near Northfields
What else we do in Northfields
When to call us in Northfields
Timber floors and skirting shrink and swell through the year. Heating dries timber and opens gaps along the skirting.
The most common problems we see are:
- Tiled floors with no room to move
- Open joints that fill with dirt
- Gaps opening between the floor and skirting
- Threshold joints that have opened or worn
For site and facilities teams at buildings such as Mount Carmel Catholic Primary School, floor joints in corridors, halls and entrances take heavy wear and need resealing before the edges break up.
Before you book anyone
- What happens if the job turns out different
- Whether you can choose the colour
- How long to leave it before use
- Whether the sealant suits the joint