Greater London · England

Floor Joint Sealing in High Barnet

Sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints in High Barnet, with a one-year guarantee on every job. Ask us for a quote.

  • Failed joint filler in concrete floors
  • Skirting caulk that keeps splitting
  • Gaps at thresholds between rooms

Need floor joint sealing in High Barnet?

What the job involves on each surface

Skirting boards

Skirting pulls away from the floor as floors shrink and settle. We seal them with a flexible sealant rather than caulk painted or coloured to match.

Concrete floor joints

Sawn joints in concrete floors control where it cracks. We reseal them with a floor-joint product suited to the traffic.

Floor joint sealing for homes and businesses in High Barnet

We seal floor joints in homes, offices and commercial buildings across High Barnet. Each job starts with looking at the floor and the gap, because the right sealant depends on both. If you’re dealing with failed joint filler in concrete floors and tiled floors with no room to move, we can help, whatever the surface.

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.

We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.

Eleven members of the Mr Mastic team standing in front of branded white vans
Place
High Barnet (EN5)
Wider area
Greater London
Cover
A year, on every job
Quotes
A clear quote up front
Telephone
0345 464 0079
Page updated
26 October 2026

Why act early in High Barnet

Waiting until the next redecoration can mean a winter of draughts and dirt in the gaps. Sealing them now is a short job in most rooms. In London conversions, one flat’s bathroom is often above another flat’s ceiling, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.

Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.

Why book with us

  • 180+ five-star Google reviews
  • Approved under the ARBOMaster scheme
  • Sanitary silicone with an anti-fungal additive in wet areas
  • 20+ years of sealant experience

See what affects the cost and customer reviews.

What floor joint sealing looks like in High Barnet

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. The joint at the skirting or threshold has to allow for that. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.

For site and facilities teams at buildings such as Foulds School, entrance and corridor floor joints take a lot of traffic. Rented homes near Hadley Wood station change hands often, and gaps at skirtings and thresholds are worth sealing between tenancies. For buildings such as Christ Church, floor and skirting joints in halls and kitchens wear like any others.

High Barnet is about 1 mile north-west of Barnet, in Greater London. Jobs in High Barnet get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Our area takes in 764 places across Greater London. For nearby work, see our London page.

Work in EN5 works the same way as everywhere else we cover. Whether your property is on Byng Road, Park Road and Kings Road or a nearby road, our applicators can take on the job. High Barnet sits on or near the A1081, which makes travel easy. We also cover Hadley (1 mile east), Arkley (1 mile south-west), Kitts End (1 mile north), Totteridge (1 mile south) and Rowley Green (2 miles west). Larger places within reach include London (12 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (11 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).

Near you in High Barnet

In High Barnet, that means homes and buildings near Susi Earnshaw Theatre School, The White Lion pub and Queen Elizabeth's School and the streets around them. High Barnet’s nearest station is Hadley Wood station, roughly 1.6 miles north-east of the centre. Well-known places in the area include Spires Shopping Centre (less than half a mile east) and Barnet General Hospital (0.5 miles south-west). Open spaces near High Barnet include Barnet Countryside Centre and Darland's Lake.

Map of High Barnet © OpenStreetMap contributors

High Barnet questions

Is parking an issue for floor joint sealing in High Barnet?

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 do floor joint sealing in High Barnet?

Yes, High Barnet is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.

Do you work on commercial floors?

Yes, including warehouses, units, shops and offices. We can plan around your opening times, and out-of-hours work can be arranged.

How much does floor joint sealing cost in High Barnet?

Size, access and the old material all affect the cost. Call for a quick quote.

How long before the joint can take traffic?

That varies with the sealant and the room. Before we leave, we tell you when it can be walked on, mopped and driven over.

Can you quote for more than one area?

Yes, we can. Several rooms, windows or areas can go on one quote.

Can you seal where the floor meets the bath panel?

Yes. Wet-area floor joints are sealed with a flexible, water-resistant silicone to keep mop water out.

What do you need from me for a quote?

Tell us what needs doing and where, with pictures by email if possible. If we need more, we’ll ask.

What sealant work cannot fix

Sealant is not the answer to every problem, and we’d rather say so up front. Sealant won’t put right:

  • Large cracks that need a surveyor
  • Failed waterproofing under a wet room floor
  • Subfloor problems that need a flooring contractor

If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.

What we seal

  • Skirting boards
  • Commercial floors
  • Thresholds
  • Wet room & bathroom floors
  • Tiled floors
  • Concrete floor joints

Aftercare tips

Looking after new joints is easy, and it makes a real difference:

  • Walk round the room once a year and look at the edges
  • Keep caulk for dry, still joints only
  • Use a well-wrung mop rather than flooding the floor
  • Use furniture pads near skirting

Keep heavy furniture from dragging across the joints. Sharp edges can cut the sealant.

Concrete joints damaged by traffic get worse quickly. Early resealing helps keep the joint intact.

Quotes for floor joint sealing in High Barnet

There’s no set price list. What we look at:

  • The size of the job
  • How many rooms, windows or areas are involved
  • How much old sealant there is and how hard it is to remove
  • Whether the work is at height

Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are unsure, ring 0345 464 0079 or drop us an email for an honest opinion and a quote.

Asking for a quote

When you call or email, it’s useful to know:

  • Roughly how big the job is
  • If someone has resealed it before
  • What’s wrong with the joints now
  • Where the property is

Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand.

DIY sealant or a professional job?

What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.

Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.

What happens on the day

Good joint work is mostly preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours for most rooms, longer for large commercial floors. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.

  1. We start by looking at the floor, the gap and the traffic, then choose the product.
  2. Whatever is in the joint now, whether caulk, grout or sealant, comes out.
  3. The joint is cleaned, vacuumed and backed where depth needs controlling.
  4. The sealant goes in, chosen for the floor and coloured to suit it.
  5. We tool the joint neatly and tell you when it can be walked on and cleaned.

Preparing for the visit

  • For indoor joints, keep the area dry beforehand if you can
  • Clear the area around the work
  • Plan for the work area to be out of bounds to pets and children

Getting a quote

For a quote, call 0345 464 0079 or send us an email with the location and a short description of the problem. You will have a clear quote before we start.

Get a price

Advice

20+ yearsMastic and sealant specialists
ARBOMaster approvedApproved applicator for Arbo sealants
Fully insuredDomestic, commercial and hotels
One-year guaranteeOn every job