Highgate mastic sealing
Looking for mastic sealing in Highgate? It’s simple: send details, get a quote, we seal, guaranteed.
- The same joint failures repeated across a portfolio
- Draughts at frames across a block
- Complaints coming in block by block
Mastic sealing in Highgate
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our mastic sealing in Highgate
Different joints need different sealants. Window perimeters and external joints often take a low-modulus neutral-cure silicone, and MS polymer sealants stick well to many substrates and often take paint, and colours are confirmed for whichever product is used. We work on communal kitchens and washrooms, shopfronts below residential blocks and external wall and movement joints, and the failures we’re asked to look at most are brittle perimeter mastic across a building and movement joints with sealant missing. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Highgate, preparation and product choice get the time they need.
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.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Location
- Highgate (N6, N19, NW5)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Site staff or a sealant specialist?
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
Diagnose, treat, sign off
We schedule the visit to fit the site hours and access windows you give us. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. All of Greater London is in the ULEZ, and kerbside space in Highgate can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- A building-by-building inspection lists the failed joints.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
Getting the site ready
- Share your working hours and any access restrictions
- Arrange parking or a loading space
- Warn occupants and staff about the work
Get a fixed quote
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
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Building owners, agents and FMs in Highgate
Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, and each stage is agreed with your contact.
Building owners and managing agents use us on everything from one building to a spread of sites around Highgate. One quote can cover more than one site, so there’s one set of paperwork to deal with.
Nearby places to Highgate
Also in Highgate
What the job involves on each surface
Window and door perimeters on blocks
On most blocks, the frame-to-wall joint is where failure shows first. We remove the failed mastic, prepare the faces, add backing rod if the joint is deep and reseal.
Estate-wide resealing programmes
Housing associations and agents often manage many similar blocks. Each block is priced and scheduled in order.
What happens if it’s left?
Piecemeal repairs over the years often leave mismatched sealant. Resealing a whole building gives a consistent finish. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
The price depends on the quantity of joints, how much old material needs removing and the access. Call for a quote when you’re ready.
Why us?
- Work carried out by CSCS-carded applicators
- 12 months’ guarantee on every job
- One contact handling all your sites
- Sealing commercial buildings since 2005
Looking after the joints
Regular inspection catches problems early. Specifically:
- Reduce knocks to communal area joints
- List the paperwork your organisation requires when you send details
- Log resealing dates block by block
- Check sealant joints during planned building inspections
Keep bins, bikes and deliveries away from low-level joints where you can. Knocks cause many early failures in communal areas.
Budgets are easier to plan when sealant is part of planned maintenance. A programme can start with the worst buildings and work down the list.
Frames, entrances and external joints in Highgate
Six care or nursing homes sit less than 2 miles from Highgate. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents. For a London block, the agent or landlord usually handles notices to residents and access to flats. We plan around the notices and access you arrange.
Student accommodation around universities such as American University in London (1.5 miles south-east of Highgate) is usually managed block by block, which suits a planned mastic programme. If you own or manage units on a site such as Bush Industrial Estate, which lies south-east of Highgate, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. Schools and community buildings such as St Michael's Church of England Primary School need frame and external mastic kept sound like any building.
Highgate is about 2 miles north-east of Hampstead, in Greater London. We cover commercial sites throughout Highgate, whether it’s a single job or part of a planned programme. Highgate is one of 764 places in Greater London on our list for mastic joints.
Commercial sites across N6, N19 and NW5 are covered. Among the streets we cover are Wood Lane, Grange Road and Talbot Road, and sites on any of them can send details for a fixed quote. We also cover Upper Holloway (1 mile south-east), Dartmouth Park (1 mile south), Lissenden Gardens (1 mile south), Crouch End (1 mile north-east) and Tufnell Park (1 mile south-east). Nearby towns on our patch include London (5 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south), Kensington (6 miles south-west), St Pancras (3 miles south) and Shoreditch (4 miles south-east).
Local landmarks in Highgate
Recent enquiries here include premises near The Angel Inn, St Aloysius RC College and Whittington Park, among other places. For rail, the closest station is Upper Holloway station, about 0.9 miles south-east. A little further out are Highgate Private Hospital (0.6 miles north-west) and Montfichet's Tower (4.4 miles south-east). For a walk, there’s Darland's Lake and Parkland Walk.
Your questions answered
Can you work in a London building with booked loading and goods-lift slots?
Yes, most London buildings have access rules of some kind, and we plan around them. Say when the building is occupied and when it’s quiet, and we will plan accordingly. The ULEZ covers the whole of Greater London, which we allow for
We manage a building near Upper Holloway station. Can you help?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Photos of each elevation help us quote accurately.
Can weather delay the job?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.
Is mastic sealing guaranteed?
Our workmanship carries a 12-month guarantee, backed by public liability insurance.
How many days will you need on site?
The duration is planned around your programme and the access we’re given. You’ll have an expected duration with the quote.
When can the area be used after sealing?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
How do you handle work on occupied blocks?
We plan around people living or working in the building. Dates and areas are agreed with you so residents or tenants can be told and communal access is kept open.