Greater London · England
Friern Barnet Floor Joint Sealing
Our applicators work in Friern Barnet on sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints. Old sealant removed completely, joints prepared properly.
- Gaps opening between the floor and skirting
- Threshold joints that have opened or worn
- Floor edges that trap water and grime
How we handle floor joint sealing in Friern Barnet
Wet-area floor joints keep water out of the gap behind skirting and plinths. We seal them with a flexible, water-resistant sealant. We work on concrete floor joints, tiled floors and wet room & bathroom floors, and common reasons people get in touch are threshold joints that have opened or worn and failed joint filler in concrete floors.
New flats are going up across London, many of them in larger developments. In a new development, snags are often reported through the developer or the managing agent, and shower seals that fail early, skirting joints that open up and gaps at thresholds are all common snags.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Friern Barnet (N11, N12, N10, N20)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
The process
Good joint work is mostly preparation, so that is where we spend the time. Joints are cleaned back and dried before anything new goes in. All told, the work takes a morning or an afternoon for most homes. In Friern Barnet, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We start by looking at the floor, the gap and the traffic, then choose the product.
- Old caulk, grout or sealant is removed from the joint.
- The joint is vacuumed clean, with backing fitted wherever depth matters.
- A flexible sealant, or a floor-joint sealant for concrete, is applied in a colour to suit.
- The joint is tooled to a neat finish and we tell you when it can take feet and a mop.
Getting ready for the visit
- Move anything stored near the joints
- Keep children and pets away from the work area
- Mention any parking rules near the property
Ask for a quote
We quote each job on its own. Simply phone 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
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New homes and floors in Friern Barnet
Many of London’s new homes are flats in bigger 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 do not all move the same way. The joint at the skirting or threshold has to allow for that.
Rented homes near New Southgate station change hands often, and gaps at skirtings and thresholds are worth sealing between tenancies. Friern Barnet is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Friern Barnet is about 2 miles north-east of Finchley, in Greater London. Jobs in Friern Barnet get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Greater London, we cover 764 places, Friern Barnet among them. There’s also a page for London, about 8 miles away.
Work in N11, N12, N10 and N20 is quoted and booked the same way as anywhere else. Local streets include Martock Gardens, Shapwick Close and Radstock Close. Being close to the A406 and B550, Friern Barnet is simple for us to get to. We also cover the places around Friern Barnet: New Southgate (1 mile east), Brunswick Park (1 mile north), North Finchley (1 mile west), Arnos Grove (1 mile east) and Whetstone (1 mile north-west). Within a short drive, 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).
Near you in Friern Barnet
Around Friern Barnet, our work takes us to homes and buildings near Francis Skaryna Belarusian Library and Museum, Friary Park and Friern Barnet School and the streets around them. There’s a railway station in Friern Barnet itself: New Southgate station. Well-known places in the area include Francis Skaryna Belarusian Library and Museum (1.4 miles west) and Grand Arcade (1 mile west). Open spaces near Friern Barnet include Highgate Hill and Darland's Lake.
Friern Barnet: your questions answered
Do you cover Friern Barnet for floor joint sealing?
Yes, Friern Barnet 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 will give you a clear price.
Is parking an issue for floor joint sealing in Friern Barnet?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Do you guarantee your work?
Yes, for a year. If anything is not right with the work within the year, let us know and we will sort it.
Where is Mr Mastic based?
We work from Crawley. Our applicators cover Friern Barnet, along with the rest of our area.
Will I be able to paint over the new joint?
If you tell us beforehand, yes. Joints that will be painted get a paintable product.
Do the sealants smell?
Sometimes, a little. Any smell clears as the sealant cures, and ventilation helps.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or send us an email.
Can new sealant go over the old?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
What we’re called out for in Friern Barnet
When a tiled floor has no movement joints, the grout takes the strain. Cracks often run straight along a line of joints, where a flexible joint should have been.
Keep an eye out for these signs:
- Chipped and open joints in warehouse floors
- Grout cracking in a straight line across a floor
- Skirting that has pulled away from the floor
- Worn sealant at door thresholds
Schools such as Holly Park Primary School are buildings too, and floor and threshold joints in busy corridors wear quickly and are best resealed early.
Before you book anyone
- How the colour is chosen
- How much experience the applicator has
- How the surfaces are prepared before sealing
- What product goes in the joint
How to look after the new joints
Looking after new joints is easy:
- Have a cracking tiled floor checked before tiles break
- Check the sealant is paintable before decorating
- Sweep along the edges of the floor
- Do not fill floor joints with caulk where they move or get wet
Keep heavy traffic off resealed concrete joints for the cure time we give you. Cone off the area if needed.
Once concrete joint edges start to break, wheels make it worse. Sealing them early protects the edges and the floor safer.
Towns and villages near Friern Barnet
Also in Friern Barnet
Why deal with it now?
Putting new grout into a crack that keeps reappearing does not last. The movement is still there, so the grout fails again. A flexible movement joint is the fix. In a flat in Friern Barnet, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
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.
Why Friern Barnet customers choose us
- We never seal over old sealant
- An ARBOMaster approved applicator
- Full insurance on every job
- Homes, businesses and hotels
Take a look at our cost guide or our reviews.
Quotes for floor joint sealing in Friern Barnet
You will get a clear quote before any work starts. It’s based on:
- Working hours on commercial sites
- How much there is to do
- Whether old sealant or filler has to be cut out
- Mould in or behind the old joints
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email and we will give you an honest view and a quote.
What to tell us for a quote
Photos help, but a description is a good start. Try to tell us:
- The problem you’ve noticed
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- How many joints, rooms or windows are involved
Need a quote? Please call 0345 464 0079 or email us with a few details. We’ll explain what we’d do and give you a clear price before any work starts.
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What sealant work cannot fix
Sealant is not the answer to every problem, and we’ll tell you before work begins. It will not solve:
- Leaks from a failed tanking system
- Loose, hollow or cracked tiles, which need a tiler
- Cracked or broken concrete slabs
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
What we seal
- Tiled floors
- Concrete floor joints
- Skirting boards
- Commercial floors
- Thresholds
- Wet room & bathroom floors