Greater London · England
Erith Floor Joint Sealing
Floor joint sealing for Erith, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Open joints around bathroom floor edges
- Cracked grout where a tiled floor needs a movement joint
- Perimeter joints in tiled floors filled with grout
Floor joint sealing in Erith, done properly
Floor joint sealing is mostly about choosing the right product and preparing the joint. We remove what’s there first, then clean, back and seal the joint. If you have dirt and water collecting in open floor joints and cracked caulk along skirting in bathrooms and kitchens, we can put it right, on thresholds, wet room & bathroom floors and commercial floors alike.
London homes range from new-build flats to period conversions with new floors laid over old boards. Every joint between floor, skirting and threshold has to cope with some movement.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Erith (DA8, DA17, DA7)
- Wider area
- Greater London
- Guarantee
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Landlords, agents and businesses in Erith
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The work normally takes a few hours for most rooms, longer for large commercial floors, depending on the amount of work. 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.
- The room is cleared along the joints so we can reach them.
- Old material is removed from the joint.
- Edges are cleaned and dried.
- A flexible sealant suited to the floor is applied and smooth it.
- Finally, we check the work and talk you through aftercare.
How to prepare
- Mention any parking rules near the property
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
Getting a quote
Getting a quote is simple: tell us what needs doing and where and its rough size. Photos by email help us understand the job, and we will take it from there.
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Nearby places to Erith
Other services in Erith
What we’re called out for in Erith
A floor laid tight to the walls has no room to move. It pushes against the walls and skirting as it expands and joints fail.
The most common problems we see are:
- Worn sealant at door thresholds
- Concrete floor joints that have broken down
- Open joints that fill with dirt
- Open gaps along the bottom of skirting boards
If you look after a church, hall or community building such as Christ Church, joints in its floors, skirtings and thresholds need resealing as they wear.
Before booking anyone
- How the surfaces are prepared before sealing
- Is the old sealant removed completely?
- Are they insured?
- Is VAT in the price?
When it is not the sealant
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- Water getting under the tiles from elsewhere
- Tiles that have lifted or broken
- Structural movement or subsidence
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Concrete floor joints
- Thresholds
- Tiled floors
- Commercial floors
- Skirting boards
- Wet room & bathroom floors
Floor joint sealing in Erith: local notes
Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent. Across Greater London, floors range from older suspended timber floors to concrete slabs in newer homes and commercial units, and each moves in its own way. The joint at the skirting or threshold has to allow for that.
Managing a site like Christ Church (Erith) CofE Primary School? Then entrance and corridor floor joints take a lot of traffic. For landlords with property near Erith station, gaps at skirtings and thresholds are worth sealing between tenancies.
Erith is about 3 miles north-west of Dartford, in Greater London. Jobs in Erith get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. 764 places in Greater London are on our list, from the larger towns to small villages. Our London page covers work nearby.
Here we cover the DA8, DA17 and DA7 postcode area for floor joint sealing. Whether your property is on Church Road, Town Square and Erith High Street or a nearby road, we can help. Other places close to Erith include Northumberland Heath (1 mile south), Bexley Riverside (1 mile south), Belvedere (1 mile north-west), Lessness Heath (1 mile north-west) and Barnehurst (1 mile south). Further out, we also cover London (11 miles west), City of Westminster (14 miles west), Marylebone (14 miles west), St Pancras (13 miles west), Shoreditch (11 miles west) and Walthamstow (11 miles north-west).
Around Erith
In Erith, that means homes and buildings near Trinity School, The Cross Keys pub and Erith School and the streets around them. Erith has its own railway station: Erith station. A little further out are Erith Museum (within half a mile east) and Erith and District Hospital (within half a mile south-west). Open spaces near Erith include Crossness Nature Reserve.
FAQs for Erith
Do you work for landlords with property near Erith station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking a problem for a job in Erith?
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.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
How soon can the floor be mopped?
We give you a cure time for each joint. Light use comes first, cleaning and heavy traffic later in most cases.
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
What affects the quote in Erith
For a quick quote, just ask. What matters most is:
- Whether old sealant or filler has to be cut out
- Any working-time requirements on site
- The type of sealant required
- Any mould that needs treating
Doing several joints on one visit is generally more efficient than separate visits, so tell us about everything that needs sealing. You will get one clear quote for the whole job.
What to tell us for a quote
Photos by email are helpful but not essential. Please mention:
- The problem you’ve noticed
- Access, such as stairs, a lift or height
- Photos by email, if that is easy
- Where the job is, and your postcode
It all starts with a short chat. Describe the problem, the location and the size of the job. When it suits you, phone 0345 464 0079 or drop us an email.
Different surfaces, different methods
Tiled floors
The edge of a tiled floor, where it meets the wall or skirting, should be a flexible joint. Grout at the edge is removed and replaced with sealant.
Thresholds
Two different floors meeting at a threshold move differently. We bridge them with a flexible bead.