Sealant specialists in Nunhead
Work needed on a sealant joint in Nunhead? We assess it, carry out the work and guarantee our workmanship for 12 months.
- Greasy, split joints in a kitchen or tea point
- A top-up bead over failed sealant, now lifting
- External beads that have gone brittle and cracked
Need commercial sealant contractors in Nunhead?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Commercial mastic work in Nunhead
Most commercial buildings carry hundreds of metres of sealant that nobody thinks about until it fails, and on a working site that typically surfaces as a leak, a stain or a complaint from occupiers. Mastic Doctor works as a commercial sealant contractor for facilities managers, managing agents and main contractors. We find out why the sealant joints failed, take them out and seal again using a sealant that suits the joint. Site teams most often ask us about external beads that have gone brittle and cracked and mouldy silicone around WCs, urinals and vanity tops, across window and door perimeters, kitchen worktops and splashbacks and floor and threshold joints. A specialist sealant contractor works differently from a general builder: in Nunhead, that means joint design, primers and backing rod as standard.
On a typical commercial building in Nunhead, the joints that fail first are the hardest-worked ones: frame perimeters in the sun, floor joints at doorways and anything that gets wet every day.
Much of the planning for a London commercial job is about getting in and out: loading bay slots, goods lifts, permits to work and somewhere to keep materials. Once that’s settled, the sealant joints are resealed in sections so tenants are disturbed as little as possible.
Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we spell out the cover before we begin.
- Location
- Nunhead (SE15, SE4, SE14)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in Nunhead
When you manage a building on behalf of an owner, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, with each stage agreed with your site contact.
Common problems we fix in Nunhead
If only one face has lost its grip, that’s an adhesion failure. Typical reasons include rushed preparation, no primer where one was needed, dust or release agents on the surface, or three-sided adhesion. It’s one of the commonest faults we find on earlier work.
Things that normally lead to an enquiry:
- Movement joints packed with grit and debris
- Messy, uneven beads from earlier work that let the building down
- Earlier reseals applied straight onto the failed bead
- Damp patches where an external joint has failed
Shops and cafés around stations like Nunhead station (less than half a mile north of Nunhead) trade from early, so work is timed around them.
Before you book anyone
- How long is the guarantee, and what does it include?
- How joint depth will be controlled
- How they’ll work around occupants
- What level of public liability insurance do they hold?
What affects the price in Nunhead
Before we quote, we look at:
- Whether the work must be split into stages
- Access and working height
- Induction, permit and paperwork requirements
- Backing rod, priming and other preparation
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.
Before you send an enquiry
For an accurate fixed quote, we need to understand the site. Useful things to include:
- The postcode of the building
- Clear photographs of the problem areas
- Any specification or named product
- How the joints are reached, and at what height
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call the office on 01277 525 020 or use the quote form with what you know.
Diagnose, treat, sign off
At the end of each section, we remove the tape, clean down and inspect every joint with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. In Nunhead, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First, details reach us through the quote form or a site visit.
- We diagnose the cause of failure and price a fixed scope.
- Work is phased around your occupiers where areas need to stay in use.
- Old sealant is cut out completely, never sealed over.
- Each joint gets a suitable sealant, laid to depth and tooled.
- A final walk-round, then the 12-month guarantee applies.
What we need from you
- Tell us which areas need to stay in use
- Tell staff and tenants when we will be in
- For older buildings, check the asbestos register before work
Request a quote
Need a figure for a tender or a budget? We’ll quote against your scope and drawings that you can work with. For a chat about it beforehand, speak to us on 01277 525 020 or send photos by email.
Advice
Also near Nunhead
More services for Nunhead
Leave it or put it right?
Before budgeting for new frames, cubicles or worktops, check whether it’s just the sealant. Often the fitting is sound and the joint is the only thing letting it down. Resealing usually costs far less than renewal, though we’ll tell you honestly if the element itself is the problem. Failed sealant in a building in Nunhead can quickly affect neighbours, tenants or the floor below. Putting it right early is less disruptive than dealing with the consequences.
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we will explain how it’s made up.
Why clients in Nunhead choose us
- Our applicators hold CSCS cards
- Products installed to the manufacturer’s instructions
- Failed material removed, not covered up
- Standard and matched colours in many product ranges
Take a look at our cost guide and how we’re accredited.
When it isn’t the sealant
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Roof leaks that only look like a joint problem
- Walls or slabs moving more than any sealant can take
- A dripping trap, valve or pipe behind a fitting
If you’re not sure, just give us a call on 01277 525 020 or email a schedule or drawings and we’ll give you a straight answer before you book.
What we seal
- Washrooms and tea points
- Floor and threshold joints
- External facade joints
- Movement joints in walls and floors
- Window and door perimeters
- Kitchen worktops and splashbacks
Commercial premises in Nunhead
There are two care or nursing homes within about 2 miles of Nunhead. In care settings, a neat joint at a kitchen worktop or a lounge window is part of keeping the place easy to clean. In London, commercial buildings often have managed loading bays, goods lifts and permit-to-work systems. Our planning starts from those rules rather than working round them later.
A hotel such as Peckham Rooms Hotel, 1 mile north-west of Nunhead, shows how much sealant a hospitality building has on show, from bathroom joints to the bar. Access in Nunhead needs thought: the ULEZ covers all of Greater London, and loading and parking are rarely simple.
Nunhead is about 1 mile south-west of New Cross, in Greater London. If you’re looking for commercial sealant contractors in Nunhead, we can help. Nunhead is one of 764 places we cover in Greater London for sealant joints.
Work on sealant joints is covered throughout SE15, SE4 and SE14. Streets here include Rye Road, Nash Road and Kitto Road, and sites on any of them can send details for a fixed quote. Just outside Nunhead, we also work 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). Further afield, our area takes in 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).
Around Nunhead
We work on buildings around The Ivy House, Peckham Rye and Allenby Tutorial Trust, among other places. Nunhead has its own railway station: Nunhead station. A little further out are Greenwich Castle (2.4 miles north-east) and Lewisham Shopping Centre (1.7 miles east). Open spaces near Nunhead include Knight's Hill and One Tree Hill.
Questions we are asked in Nunhead
Can you work in a London building with booked loading and goods-lift slots?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. The building manager’s rules go straight into our method. The ULEZ covers the whole of Greater London, which we allow for
Can you work at a site such as Goose Green Trading Estate, by Nunhead?
Yes. Estates, retail parks and business parks around Nunhead, Goose Green Trading Estate among them, are all within reach. To start, just phone 01277 525 020 or email a schedule or drawings with the unit, the joints involved and your access times.
Is it OK to apply fresh sealant over existing beads?
Removal of the failed sealant is always part of the job. Laying new silicone on old gives it nothing to grip.
Do you check for asbestos before removing sealant?
Some older mastics did contain asbestos. So we check the register first and stop work on anything suspect until it’s tested. HSE guidance on asbestos is a useful reference.
How long before the joints can be used?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Do you cover Nunhead?
Yes. Nunhead is in our area and the rest of Greater London, within our coverage of Greater London, South East England and Scotland. To discuss a job, call the office on 01277 525 020 or email a schedule or drawings.