Greater London · England
Floor & skirting joints in Nunhead, Greater London
Our applicators work in Nunhead on sealing skirting-to-floor joints, tiled floor movement joints and concrete floor joints. Old sealant removed completely, joints prepared properly.
- Failed joint filler in concrete floors
- Failed seals where bathroom floors meet baths and panels
- Tiled floors with no room to move
Joints and finishes in Nunhead homes
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 don’t all move the same way. The joint at the skirting or threshold has to allow for that.
For buildings such as Saint Antony with Saint Silas, joints in its floors, skirtings and thresholds need resealing as they wear. For landlords with property near Nunhead station, open skirting and floor joints collect dirt and water, so seal them while the property is empty. If you look after a building such as Ivydale Primary School, floor and threshold joints in busy corridors wear quickly and are best resealed early.
Nunhead is about 1 mile south-west of New Cross, in Greater London. Wherever you are in the SE15 postcode area, we cover floor joint sealing for homes and businesses. Nunhead is one of 764 places in Greater London we cover for floor joint sealing.
We work across SE15, SE4 and SE14 for floor joint sealing and the streets around it. Whether your property is on Rye Road, Nash Road and Kitto Road or anywhere close by, our applicators can take on the job. Nearby, we also carry out floor joint sealing in Telegraph Hill (1 mile north-east), Honor Oak (1 mile south), Peckham (1 mile north-west), New Cross (1 mile north-east) and Brockley (1 mile south-east). Within a short drive, we also cover London (3 miles north-west), City of Westminster (6 miles north-west), Marylebone (6 miles north-west), Kensington (7 miles west), St Pancras (5 miles north-west) and Shoreditch (5 miles north).
Near you in Nunhead
We work in homes and buildings around The Ivy House, Peckham Rye and Allenby Tutorial Trust. There’s a railway station in Nunhead itself: Nunhead station. A little further out are Greenwich Castle (2.4 miles north-east) and Lewisham Shopping Centre (1.7 miles east). Green spaces nearby include Knight's Hill and One Tree Hill.
Floor joint sealing in Nunhead
Gaps along the bottom of skirting are common in new and older homes alike. Decorators’ caulk generally cracks where there’s movement, so we use a flexible sealant that moves with the floor. We work on commercial floors, tiled floors and thresholds, and the jobs we see most are concrete floor joints that have broken down and tiled floors with no room to move.
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.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Location
- Nunhead (SE15, SE4, SE14)
- Wider area
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Landlords, agents and businesses in Nunhead
If you manage several properties in or around Nunhead, several properties can be quoted together. Send us the addresses and the work at each.
We work for landlords and letting agents as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Common questions in Nunhead
Do you work for landlords with property near Nunhead station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Is parking an issue for floor joint sealing in Nunhead?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly.
Can grout be replaced with sealant on a tiled floor?
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.
Are you ARBOMaster approved?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you take out the old sealant first?
Yes. All of the old material is cut out and the joint cleaned.
How long does the job take?
As a guide, most jobs take a morning or an afternoon for most homes. Larger jobs naturally take longer.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first.
Why deal with it now?
Water that gets past a floor joint can damage the floor beneath. Dealing with it early keeps the repair to the joint. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we will go through it with you.
Why choose Mr Mastic in Nunhead
- Quality sealants from Arbo and Everbuild
- Homes, businesses and hotels
- We never seal over old sealant
- ARBOMaster approved applicator
Take a look at how sealant jobs are priced and our reviews.
What we do, step by step
We keep the work tidy and contained to the area we are working on, so you can get on with your day. Expect the work to take a morning or an afternoon for most homes. In a London area like Nunhead, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- We start by looking at the floor, the gap and the traffic, then choose the product.
- Whatever is in the joint now, whether caulk, grout or sealant, comes out.
- The joint is cleaned, vacuumed and backed where depth needs controlling.
- The sealant goes in, chosen for the floor and coloured to suit it.
- The joint is tooled to a neat finish and we tell you when it can take feet and a mop.
How to prepare
- Mention any leaks or damp you’ve noticed
- Tell us about access, such as stairs, a lift or high-level joints
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work.
Related advice
Places near Nunhead
Also in Nunhead
Should I try it myself first?
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
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, and the work is guaranteed for a year.
What affects the cost of floor joint sealing
Every job gets its own quote. This is what makes a difference:
- The product the joint needs
- Whether the work is at height
- When we can work, for business premises
- The old material and how stubborn it is
The cost reflects the work involved, not a rough estimate. That is why we ask about the job first and send you a clear quote before work begins.
Asking for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- How we’d reach the joints
- What the problem is, such as mould, gaps, leaks or cracking
- The type of property
- Any previous sealing or DIY work
If you’re in Nunhead and need floor joint sealing, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we’ll agree the price before any work begins.
How the job changes by surface
Commercial floors
Commercial floors take more traffic than most homes. The sealant is chosen for the traffic the floor takes.
Skirting boards
Skirting gaps are one of the most common floor joints we seal. We take out any cracked caulk before sealing so the new sealant bonds.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Do not slide heavy items over sealed joints
- Keep heavy wheels off new concrete joints until cured
- Keep floor cleaning water to a minimum at the edges
- Keep caulk for dry, still joints only
Don’t paint over silicone. If you plan to paint, we will use a paintable product.
Sealing a gap while it’s small is a quick job. Left alone, they collect dirt and widen.