Greater London · England
Floor & skirting joints in Cannon Hill, Greater London
Problem with your floor joints in Cannon Hill? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Skirting caulk that keeps splitting
- Worn sealant at door thresholds
- Open joints that fill with dirt
Floor joint sealing for homes and businesses in Cannon Hill
In kitchens and bathrooms, the joint where the floor meets a bath panel, plinth or skirting takes mop water every day. A flexible silicone seal keeps it out and stops dirt collecting. Typical jobs include gaps opening between the floor and skirting and open joints that fill with dirt, on commercial floors, wet room & bathroom floors and thresholds.
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, in Cannon Hill and beyond.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Cannon Hill (SW20, SM4, KT3)
- Region
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about floor joint sealing in Cannon Hill
Can you do floor joint sealing in Cannon Hill?
Yes, Cannon Hill is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and tell us what needs doing.
Is parking a problem for a job in Cannon Hill?
Parking in Cannon Hill, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Will the old sealant be removed?
Yes. All of the old material is cut out and the joint cleaned before resealing.
When can I walk on the floor?
We give you a cure time for each joint. Light use comes first, cleaning and heavy traffic later.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
My floor grout keeps cracking in a line. Can you help?
Often, yes. Where a floor needs one, we rake out grout along the right line and replace it with flexible sealant in a matching colour. If tiles are loose, that needs fixing first.
Does someone need to be in?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Where do you work from?
Mr Mastic is based in Crawley. We cover Cannon Hill and the rest of Greater London, along with the rest of our area.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you’ve already had a go yourself, that is fine. We cut it out and start again.
Also near Cannon Hill
Other services in Cannon Hill
Why deal with it now?
An open concrete floor joint gets wider every time something heavy crosses it. Resealing it early protects the edges before they need a bigger repair. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in Cannon Hill, the repair is bigger than the sealant job would have been.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
Why us?
- Trusted Arbo and Everbuild sealants
- White, clear, grey or coloured to suit, where the product allows
- Anti-fungal sanitary silicone in wet areas
- Every job guaranteed for a year
How we quote for floor joint sealing
Jobs vary more than people expect. The main factors:
- The size of the job
- Whether there’s mould to deal with
- Access and height
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Any previous sealing or DIY work
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
For floor joint sealing in Cannon Hill, phone 0345 464 0079 or send us an email. Tell us what the problem is and where, and you will get a clear quote before we start.
Surface by surface
Skirting boards
On painted skirting, we can use a flexible sealant that takes paint. Where water is involved, silicone is the better choice.
Thresholds
Thresholds take daily traffic, so the sealant has to be tough as well as flexible and neatly finished.
Joints and finishes in Cannon Hill homes
Much of London’s new housing is flats in larger 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 South Merton station change hands often, and gaps at skirtings and thresholds are worth sealing between tenancies. If you look after a building such as Hillcross Primary School, entrance and corridor floor joints take a lot of traffic.
Cannon Hill is about 1 mile north-west of Morden, in Greater London. If you need floor joint sealing in Cannon Hill, it’s easy to get a quote: please call 0345 464 0079 or email us. We cover Greater London from our Crawley base. Cannon Hill is one of 764 places in Greater London where we work. For nearby work, see our London page (9 miles or so).
We cover every part of the SW20, SM4 and KT3 postcode area for floor joint sealing and the streets around it. If you need floor joint sealing at a property on Aylward Road, Camborne Road and Botsford Road or a nearby road, we can help. Neighbouring places we cover for floor joint sealing include Bushey Mead (1 mile north-west), Raynes Park (1 mile west), Wimbledon Chase (1 mile north), West Barnes (1 mile west) and Merton Park (1 mile north-east). Within a short drive, we also cover London (9 miles north-east), City of Westminster (8 miles north), Marylebone (9 miles north), Kensington (7 miles north), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).
Landmarks near Cannon Hill
We work in homes and buildings around The Edward Rayne pub, Cannon Hill Common and Harris Academy Wimbledon, among other places. The nearest railway station is South Merton station, roughly 0.5 miles north-east. Nearby you’ll also find St. Anthony's Hospital (1.5 miles south) and Wimbledon Museum (1.6 miles north). Green spaces nearby include Cherry Wood and Henman Hill.
How to look after the new joints
Looking after new joints is easy:
- Use a well-wrung mop rather than flooding the floor
- Check the sealant is paintable before decorating
- Have a cracking tiled floor checked before tiles break
- Sweep along the edges of the floor
Keep off the joint for the time we give you. Light foot traffic is usually fine sooner than wet cleaning or wheels so we will give you each time.
Sealing a gap while it’s small is a quick job. Ignored, they fill with dirt and open further over time.
How the visit works
At the end, we look at the finished work together. The work normally takes a morning or an afternoon for most homes, depending on the size of the job. Parking in much of London is by permit or pay-and-display, so it helps to know what’s near you in Cannon Hill. It helps if you can point us to a visitor permit or a bay close to the door.
- We clear the edges of the floor so the joints are easy to reach.
- We take out the cracked caulk, grout or old sealant.
- We clean and dry the edges of the joint.
- We apply a flexible sealant suited to the floor and smooth it.
- Finally, we check the work and talk you through aftercare.
Getting ready for the visit
- Tell us about any previous sealing or DIY attempts
- Mention any parking rules near the property
- Clear items away from the joints we are working on
Ask for a quote
We quote each job on its own, so start by telling us what you need. Just ring 0345 464 0079 or send us an email with the details.
Read more
Common problems we fix in Cannon Hill
An open floor joint fills with dirt and water. In wet areas, water runs into the gap at every clean and behind skirting and plinths.
Keep an eye out for any of the following:
- Worn sealant at door thresholds
- Cracked grout where a tiled floor needs a movement joint
- Skirting caulk that keeps splitting
- Open joints around bathroom floor edges
If you look after a church, hall or community building such as St James Merton, joints in its floors, skirtings and thresholds need resealing as they wear.
Comparing quotes
- What happens if the job turns out different
- What the cure time is
- Whether they seal over old material or remove it
- What product goes in the joint