Greater London · England
South Hampstead Floor Joint Sealing
Sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints for South Hampstead, backed by a one-year guarantee. Call for a quick quote.
- Skirting caulk that keeps splitting
- Perimeter joints in tiled floors filled with grout
- Gaps at thresholds between rooms
How we handle floor joint sealing in South Hampstead
Every floor moves a little, so its edges need a joint that can flex. Skirting-to-floor gaps, tiled floor joints and concrete joints are all sealed using a product that suits the floor. Typical jobs include gaps opening between the floor and skirting and skirting caulk that keeps splitting, across commercial floors, thresholds and concrete floor joints.
Across London, commercial floors have movement joints that break down under heavy foot traffic, and new homes need their plot mastic finished properly before handover.
Each job carries a 12-month guarantee, large or small.
- Where
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes a morning or an afternoon for most homes and we leave things clean and tidy. In South Hampstead, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We look at the gap and the floor type and agree the right sealant.
- Whatever is in the joint now, whether caulk, grout or sealant, comes out.
- The joint is vacuumed clean, with backing fitted wherever depth matters.
- The sealant goes in, chosen for the floor and coloured to suit it.
- Finally we tool it smooth and explain when the floor can be used and cleaned.
Getting ready for the visit
- Mention any tricky access
- Mention any leaks or damp you’ve noticed
- Clear items away from the joints we are working on
Ask for a quote
Asking for a quote is easy: tell us what needs doing and where, and roughly how big it is. Photos by email help us understand the job, and we’ll come back to you with a quote.
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How to look after the new joints
After the cure time, these simple habits help:
- Keep caulk for dry, still joints only
- Keep floor cleaning water to a minimum at the edges
- Get cracks along tile grout lines looked at early
- Check the sealant is paintable before decorating
Lift furniture rather than sliding it over sealed joints. Sharp edges can cut the sealant.
In wet areas, an open floor joint lets water reach the subfloor. A sound seal stops that happening.
Floor joint sealing in South Hampstead: local notes
Across Greater London, floors range from older suspended timber floors to concrete slabs in newer homes and commercial units, and they don’t all move the same way. The joint at the skirting or threshold has to allow for that. Many of London’s new homes are flats in bigger developments, where snagging may go through the developer or managing agent.
As a London address, South Hampstead can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Managing a site like The UCL Academy? Then entrance and corridor floor joints take a lot of traffic.
South Hampstead is about 1 mile south of Hampstead, in Greater London. South Hampstead gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Our area takes in 764 places across Greater London, from the larger towns to small villages.
Every address in NW3, NW8 and NW6 is covered for floor joint sealing. Local streets include Avenue Road, Acacia Road and Harben Road, all of which we cover. Neighbouring places we cover for floor joint sealing include Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). We also work in nearby towns such as London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
Around South Hampstead
Locally, jobs take us to homes and businesses close to Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School, among other places. You’ll also find Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). South Hampstead has its own railway station: South Hampstead station. Other landmarks nearby include Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). The countryside around South Hampstead includes Adelaide Nature Reserve and The Long Water.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it lifts and traps water and mould underneath. Everything old must be removed first.
A DIY attempt does not rule out a professional job. We cut it out and start again, so tell us about it when you ask for a quote.
Common problems we fix in South Hampstead
Caulk is the usual filler for skirting. In a joint that moves or gets wet, it splits so the gap reappears.
Keep an eye out for these signs:
- Threshold joints that have opened or worn
- Dirt and water collecting in open floor joints
- Chipped and open joints in warehouse floors
- Gaps opening between the floor and skirting
Letting a property close to South Hampstead station? Then gaps at skirtings and thresholds are worth sealing between tenancies.
What your quote should include
- What the cure time is
- Whether they seal over old material or remove it
- The length of the guarantee
- Which sealant they’ll use, and why
Quotes for floor joint sealing in South Hampstead
There’s no set price list. The quote depends on:
- How much old sealant there is and how hard it is to remove
- When we can work, for business premises
- How many rooms, windows or areas are involved
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, along with when we can work on site. Ask us for a quote and we will explain what it covers.
What to tell us for a quote
To help us quote quickly, let us know:
- The problem you’ve noticed
- Where the property is
- The type of property
- If someone has resealed it before
There’s no standard price list. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or email us.
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
Your questions about floor joint sealing in South Hampstead
Can you do floor joint sealing in South Hampstead?
Yes, South Hampstead is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll send you a clear quote.
Is parking an issue for floor joint sealing in South Hampstead?
Parking in South Hampstead, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Can you match the sealant colour?
In most cases you can choose. We’ll tell you which colours the right product comes in.
I rent my home. Can I book you?
Yes. Check with your landlord; we can send the quote to them too.
Can sealant along the skirting be painted?
For painted skirting, we use a flexible product that can be painted. Silicone won’t take paint, so we use it where the joint stays unpainted.
Are you insured?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can I add another job to the visit?
Of course. Doing several areas at once is generally more efficient.
Do you seal floor joints in bathrooms and kitchens?
Yes. Where a floor meets a bath panel, kitchen plinth or skirting in a wet area, we use a flexible silicone.
Nearby places to South Hampstead
Also in South Hampstead
How the job changes by surface
Concrete floor joints
Sawn joints in concrete floors control where it cracks. They’re resealed with a product chosen for what runs over them.
Wet room and bathroom floors
Bathroom floor edges get wet at every clean. A flexible seal stops water running into the gap.