Greater London · England
New Southgate Floor Joint Sealing
Floor joint sealing for New Southgate and the surrounding area: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Skirting that has pulled away from the floor
- Open joints around bathroom floor edges
- Skirting caulk that keeps splitting
How we handle floor joint sealing in New Southgate
A threshold joint has to cope with feet, movement and sometimes water. We seal them with a flexible sealant suited to the floor finishes either side in a colour to suit. We’re often asked to deal with gaps opening between the floor and skirting and open joints that fill with dirt, on commercial floors, wet room & bathroom floors and thresholds.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement, in New Southgate as anywhere.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- New Southgate (N11, N10, N14)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the cost of floor joint sealing
You’ll get a clear quote before any work starts. It’s based on:
- Whether the work is at height
- Any mould that needs treating
- The number and length of the joints
- The type of sealant required
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- The type of property
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details and send photos if you have them.
Also near New Southgate
Also in New Southgate
Aftercare tips
So the new joints stay in good condition:
- Use a well-wrung mop rather than flooding the floor
- Cone off fresh joints until they’re ready
- Don’t slide heavy items over sealed joints
- Walk round the room once a year and look at the edges
Keep heavy furniture from dragging across the joints. Sharp edges can cut the sealant before it has fully cured.
Water getting into floor joints in bathrooms and kitchens can damage what’s underneath. Resealing early keeps it out.
DIY versus a professional finish
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Joints and finishes in New Southgate homes
Floors around Greater London run from suspended timber in older homes to concrete in newer houses and units, and each moves in its own way. That’s why the skirting and threshold joints need a flexible seal. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
If you look after a church, hall or community building such as St Paul's Church, joints in its floors, skirtings and thresholds need resealing as they wear. If you look after a building such as St Paul's CofE Primary School N11, floor and threshold joints in busy corridors wear quickly and are best resealed early.
New Southgate is about 2 miles north-east of Finchley, in Greater London. Our applicators cover floor joint sealing for homes and businesses in New Southgate and nearby. We cover 764 towns and villages across Greater London. For nearby work, see our London page (8 miles or so).
Our applicators cover all of the N11, N10 and N14 postcode area for floor joint sealing and the streets around it. If you need floor joint sealing at a property on High Road, Orion Road and Atlas Road or a nearby road, our applicators can take on the job. You’ll find New Southgate on the A1003 and A1110, which makes it straightforward to reach. Neighbouring places we cover for floor joint sealing include Friern Barnet (1 mile west), Arnos Grove (1 mile east), Bounds Green (1 mile south-east), Brunswick Park (1 mile north) and Southgate (1 mile north). Further out, we also cover London (8 miles south), City of Westminster (7 miles south), Marylebone (7 miles south), Kensington (8 miles south), St Pancras (6 miles south) and Shoreditch (7 miles south-east).
Local landmarks in New Southgate
Around New Southgate, our work takes us to homes and buildings near Friern Barnet School, Ming-Ai and The Ranelagh pub, among other places. You’ll also find O. R. Tambo Recreation Ground (0.9 miles south-east) and Francis Skaryna Belarusian Library and Museum (1.8 miles west). New Southgate has its own railway station: New Southgate station. A little further out are Grand Arcade (1.5 miles west) and Broomfield House Museum (1.1 miles east). Open spaces near New Southgate include Barfield Allotments Nature Park and Highgate Hill.
How it works
We bring everything the job needs with us, so you don’t need to buy or prepare anything. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours for most rooms, longer for large commercial floors. For a job in New Southgate, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We clear the edges of the floor so the joints are easy to reach.
- Old material is removed from the joint.
- Edges are cleaned and dried.
- A flexible sealant suited to the floor is applied and smooth it.
- We check the joints and explain the aftercare.
How to prepare
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
- Tell us about access, such as stairs, a lift or high-level joints
Ask for a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
Related advice
FAQs for New Southgate
Is New Southgate in your area for floor joint sealing?
Yes, New Southgate is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Is parking a problem for a job in New Southgate?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you reseal concrete floor joints in an industrial unit?
Yes. Concrete floor joints in warehouses and units are part of our work. The product is chosen for the traffic the floor takes.
Can you seal where the floor meets the bath panel?
Yes. Floor edges in bathrooms and kitchens get wet at every clean, so we seal them with silicone suited to wet areas.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
Will the old sealant be removed?
Yes, always, and completely. New sealant won’t bond properly to old, so any old material comes out before anything new goes in.
What do you need from me for a quote?
Let us know what needs doing and where, with pictures by email if possible. If we need more, we will ask.
Why not just use caulk?
Only on dry joints that don’t move. Caulk cracks as the floor moves and the gap reopens. A flexible sealant is the better choice.
When to call us in New Southgate
Wheels crossing an unfilled concrete joint chip its edges. Hard wheels damage the joint edges.
These are the problems we are asked about most:
- Failed seals where bathroom floors meet baths and panels
- Grout cracking in a straight line across a floor
- Cracked caulk along skirting in bathrooms and kitchens
- Floor edges that trap water and grime
New Southgate is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
What to look for in a quote
- Whether all the old sealant comes out first
- What guarantee comes with the work
- What preparation is included
- Whether they’re fully insured
Why it’s worth doing now in New Southgate
Regrouting a cracked line in a tiled floor rarely fixes it. If the floor needs to move there, the grout will crack again. Replacing that line with flexible sealant gives it somewhere to go. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in New Southgate, the repair is bigger than a sealant job.
We do not show prices on the website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
Why book with us
- 180+ five-star Google reviews
- Arbo and Everbuild products
- Over 20 years’ experience
- Approved under the ARBOMaster scheme
Read what affects the cost or customer reviews.
When it is not the sealant
We will always be straight with you, so here’s what new sealant will not do:
- Loose, hollow or cracked tiles, which need a tiler
- Subfloor problems that need a flooring contractor
- Concrete repairs beyond the joint
If you are not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer before you book.
Where we work in New Southgate
- Thresholds
- Commercial floors
- Concrete floor joints
- Tiled floors
- Skirting boards
- Wet room & bathroom floors