Greater London · England
Coulsdon Floor Joint Sealing
Sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints for Coulsdon, backed by a 12-month guarantee. Ask us for a quote.
- Skirting that has pulled away from the floor
- Dirt and water collecting in open floor joints
- Cracked grout where a tiled floor needs a movement joint
How we handle floor joint sealing in Coulsdon
Good floor joints come down to the right product and clean, prepared edges. We remove what’s there first, then clean, back and seal the joint. Common call-outs are for grout used at the floor edge instead of sealant and open gaps along the bottom of skirting boards, across skirting boards, thresholds and commercial floors.
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, in Coulsdon and beyond.
Our work is backed for twelve months, in Coulsdon and everywhere else we cover.
- Location
- Coulsdon (CR5, CR8, CR3)
- Region
- Greater London
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Surface by surface
Wet room and bathroom floors
In a wet room, the floor-to-wall joint is a key line of defence. It’s resealed with a sanitary silicone and we’ll say if the problem looks like more than the joint.
Commercial floors
Floor joint work in businesses can be planned around your hours. We can arrange out-of-hours work.
Landlords, agents and businesses in Coulsdon
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
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 that we can handle for you.
When it is not the sealant
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Tiles that have lifted or broken
- Water getting under the tiles from elsewhere
- Floors that are uneven or need levelling
If you’re not sure, just ring 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Tiled floors
- Wet room & bathroom floors
- Skirting boards
- Thresholds
- Concrete floor joints
- Commercial floors
Why deal with it now?
Left open, concrete joints break down under traffic. A sealed joint supports the edges before they need a bigger repair. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Coulsdon, the repair is bigger than a sealant job.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why Coulsdon customers choose us
- One-year guarantee on every job
- Homes, businesses and hotels
- Any old sealant cut out fully, not covered over
- We are fully insured
See what affects the cost and customer reviews.
New homes and floors in Coulsdon
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.
Rented homes near Coulsdon South station change hands often, and a tidy floor and skirting joint helps a rental look ready for the next tenant. If you look after a building such as Smitham Primary School, floor and threshold joints in busy corridors wear quickly and are best resealed early. Coulsdon is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Coulsdon is about 13 miles south of London, in Greater London. Across the CR5 area, we cover floor joint sealing for homes and businesses. Coulsdon is one of 764 towns and villages in Greater London we cover for floor joint sealing. There’s also a page for London, roughly 13 miles from Coulsdon.
We cover every part of CR5, CR8 and CR3 for floor joint sealing and the streets around it. Local streets include Hadleigh Grove, Farthing Way and Dobson Close, all of which we cover. Main roads around Coulsdon include the B276 and B2030, so getting to you is simple. We also cover the places around Coulsdon: Woodcote (1 mile north), Old Coulsdon (1 mile south-east), Woodmansterne (1 mile west), Chipstead (1 mile south-west) and Purley (2 miles north-east). Larger places within reach include London (13 miles north), City of Westminster (14 miles north), Marylebone (14 miles north), Kensington (13 miles north), St Pancras (15 miles north) and Shoreditch (15 miles north).
Near you in Coulsdon
In Coulsdon, that means homes and buildings near Dollypers Hill, Coulsdon Sixth Form College and The Pembroke pub. Coulsdon has its own railway station: Coulsdon South station. Well-known places in the area include Croydon Airport Visitor Centre (3 miles north) and Purley War Memorial Hospital (2 miles north-east). Green spaces nearby include Duppas Hill and Mercers Lake.
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Cone off fresh joints until they’re ready
- Lift furniture rather than dragging it across joints
- Act on grout cracks that run in a straight line
- Check the sealant is paintable before decorating
Don’t paint over silicone. If you plan to paint, we’ll use a paintable product.
A gap under the skirting collects dust and lets draughts through. Sealing it keeps the room tidier and the edges sound.
How the visit works
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the work takes a few hours for most rooms, longer for large commercial floors in most cases. In a London area like Coulsdon, the main things to plan are parking and access: let us know about parking, the floor we’ll be working on and any lift or shared entrance.
- We start by checking the floor, the joint and what traffic it takes.
- Any old caulk, grout or sealant is raked or cut out.
- The joint is vacuumed clean and backing fitted where needed.
- We apply the sealant in a colour that suits the floor.
- We tool it 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
- Plan for the work area to be out of bounds to pets and children
- Mention if the joints have been sealed before
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, phone 0345 464 0079 or email us.
Related advice
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
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Coulsdon questions
I let a flat near Coulsdon South station. Can you help?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Do you cover Coulsdon for floor joint sealing?
Yes, Coulsdon is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job, and we’ll give you a clear quote.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can you match the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The product needed can limit the range.
How long will you be here?
Typically it takes a morning or an afternoon for most homes. Larger jobs naturally take longer, and we’ll say how long yours will take.
Is it worth trying it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
What does floor joint sealing cost?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You’ll get a clear quote before we start.