Mastic sealing for building owners and managing agents in Herne Hill, Greater London
Commercial sealant work in Herne Hill for contractors, FMs and building owners: mastic sealing for building owners, managing agents and housing associations, quoted at a fixed price.
- Open joints in brickwork or panels
- Damaged joints in communal entrances and corridors
- Old repairs sealed over failed mastic
Mastic sealing for Herne Hill sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Our process
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. Most London premises stay occupied while we are on site, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First we look at the mastic on each building and note what needs replacing.
- A fixed quote follows, split by block or building if that suits you.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- We remove the old mastic completely and clean the joint faces back.
- Backing rod and primer go in where the joint and the product need them, then new sealant is applied and tooled.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Before we start on site
- Clear stock, furniture or equipment away from the joints
- Point out parking and an unloading spot
- Send your site hours and access windows
Get a fixed quote
For a fixed quote, call 01277 525 020 or use the quote form. Our quote form is another easy route.
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Mastic sealing in Herne Hill
On a residential block, the work happens around people’s lives. Dates, areas and the order of work are agreed with you in advance so you can let residents know what is happening. Entrances and stairwells are kept in use while we work. We work on communal kitchens and washrooms, window and door perimeters on blocks and external wall and movement joints, and the failures we are asked to look at most are brittle perimeter mastic across a building and open joints in brickwork or panels. Whether you call it commercial sealant work, mastic application or joint sealing, in Herne Hill it comes down to the same thing: the right product in a properly prepared joint.
London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Window and door perimeters, balcony joints and communal areas all have mastic that ages together across a building, which is why block-wide programmes make sense.
Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we’re upfront about that.
- Location
- Herne Hill (SE22, SW2, SE24)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
Also near Herne Hill
Also in Herne Hill
Should maintenance staff do it?
Some joints are best left to specialists: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong usually costs more in the end than doing them right.
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we will confirm the paperwork you need with the quote.
How the quote is worked out
What shapes the price:
- Joint width, depth and condition
- The total length or number of joints
- Removal of failed or old sealant
- Location, for remote and island sites
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
Before you send an enquiry
We can often quote from photos and a few details. Please tell us:
- The postcode of the building
- Approximate linear metres or a joint schedule
- Anything awkward about access or site hours
- Whether an asbestos survey exists
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, ring 01277 525 020 or email the details over.
Work for main contractors and building owners
Building owners and managing agents use us on sealant work across single buildings or whole portfolios around Herne Hill. One quote can cover more than one site, so there’s one set of paperwork to deal with.
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
When it isn’t the sealant
Some faults sit outside our scope, and we say so rather than covering them up:
- Old mastic suspected of containing asbestos, which must be tested and dealt with by a specialist first
- Leaks from above rather than through a joint
- Glazing that needs replacing
If in doubt, call 01277 525 020 or email the details over and we will say what we think before you book.
Where we work in Herne Hill
- Communal entrances and stairwells
- Balcony and threshold joints
- External wall and movement joints
- Shopfronts below residential blocks
- Communal kitchens and washrooms
- Window and door perimeters on blocks
Herne Hill: questions and answers
Will you take on work at estates like Bessemer Park Industrial Estate, close to Herne Hill?
Yes, sites like Bessemer Park Industrial Estate are within our area, along with the rest of Herne Hill. A few photos and the unit address let us price the work.
Can you quote for a block close to North Dulwich station?
Yes. Blocks of any size are within what we do. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
Can weather delay the job?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so frost, rain or cold mornings can delay outside work. Inside work is seldom held up.
What about access for upper-floor joints?
We talk through access for each building when we quote. Tell us the building height and any access already in place and we will confirm the approach in the quote.
Do you work for managing agents and housing associations?
We do. Managing agents, property factors in Scotland, housing associations and landlords with block or commercial portfolios are our main clients for this work and work can be quoted per building or as a whole.
Is Herne Hill in your area?
Yes. Herne Hill falls within our area, and the simplest way to start is to call 01277 525 020 or email a schedule or drawings.
Do you do block-wide mastic programmes?
Yes, planned programmes suit estates and portfolios. The quote can be split however suits your budgeting.
For owners and agents in Herne Hill
In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. Our programme follows the access you agree with residents.
Landlords with units on estates such as Bessemer Park Industrial Estate, 0.5 miles to the north-west of Herne Hill, can bring frame, door and external mastic across several units into one programme. Site managers at schools like Judith Kerr Primary School can fit frame mastic into the summer works. Owners of student blocks near King's College London (to the north of Herne Hill) can schedule frame and external mastic for the summer vacation.
Herne Hill is about 3 miles south of London, in Greater London. Across the SE22 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 764 places in Greater London, from busy centres to rural villages.
If you need mastic sealing in SE22, SW2 and SE24, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. We cover commercial and managed buildings on Jelf Road, Dewey Lane and Talma Road and the roads nearby. With the A204 and A2214 nearby, Herne Hill is easy to get to with materials and equipment. We also cover Dulwich Village (1 mile south-east), East Dulwich (1 mile north-east), Dulwich (1 mile south-east), Denmark Hill (1 mile north) and Camberwell (1 mile north) for mastic joints. Bigger towns within reach include London (3 miles north), City of Westminster (5 miles north-west), Marylebone (5 miles north-west), Kensington (6 miles north-west), St Pancras (5 miles north) and Shoreditch (5 miles north).
Near you in Herne Hill
Locally, jobs take us to sites close to The Charter School, Half Moon pub and Belair Park and the streets around them. Herne Hill has its own railway station: North Dulwich station. Well-known places in the area include Surrey Quays Shopping Centre (3.5 miles north-east) and House of Dreams Museum (0.7 miles north-east). Not far away are Battersea Park Lake and Knight's Hill.
Why it’s worth doing now in Herne Hill
Adding sealant to cyclical maintenance is an easy win. Leaving it until there’s a leak turns it into reactive work with less control over timing. Getting scaffold, permits or access booked in Herne Hill takes effort, so while access is arranged it pays to renew all failing joints, not just the worst.
Pricing mastic joints depends on how many there are, their condition and the access, plus any specification you’re working to. Call for a quote.
What you get with us
- Failed material removed, not covered up
- Colour agreed before work starts
- Fully insured, including public liability cover
- Constructionline member
See how commercial sealant jobs are priced or our accreditations and insurance.