Construction Mastic in Highgate
Need construction mastic in Highgate? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Failed sealant in an existing building being refurbished
- External joints sealed in damp or cold conditions that are now failing
- A mastic package split between trades with no clear owner
Construction mastic for businesses in Highgate
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Commercial clients in Highgate
We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Highgate. Several sites can go on one quote, so there’s one set of paperwork to deal with.
Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, and each stage is agreed with your contact.
Construction mastic in Highgate
Getting a subcontractor through site induction should be simple. We’re a Constructionline member and CHAS accredited, and every applicator holds a CSCS card. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. Most enquiries involve a mastic package split between trades with no clear owner and failed sealant in an existing building being refurbished, across cladding and panel joints, sanitary and kitchen joints and brick and block movement joints. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, the work in Highgate is the same: the right product in a properly prepared joint.
Around Highgate, as across London, much of the work is refurbishing existing buildings as well as building new ones. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.
Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Where
- Highgate (N6, N19, NW5)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Sites and facades in and around Highgate
Site traffic in Highgate falls within London’s ULEZ, like everywhere else in Greater London. Delivery slots and scarce storage shape how and when the mastic goes in. A 2-mile radius around Highgate takes in plenty of hotels. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
When units on a site such as Bush Industrial Estate (0.9 miles south-east of Highgate) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package. For contractors on a campus like American University in London, 1.5 miles south-east of Highgate, facade and perimeter sealing has to fit around students and term dates.
Highgate is about 2 miles north-east of Hampstead, in Greater London. Across the N6 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. 764 places across Greater London fall within our area, Highgate among them.
Business premises anywhere in N6, N19 and NW5 are within our area for mastic packages. 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. If your building is just outside Highgate, we 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
We work on buildings around The Angel Inn, St Aloysius RC College and Whittington Park, among other places. Highgate’s nearest station is Upper Holloway station, roughly 0.9 miles south-east of the centre. A little further out are Highgate Private Hospital (0.6 miles north-west) and Montfichet's Tower (4.4 miles south-east). Green spaces nearby include Darland's Lake and Parkland Walk.
When to call us in Highgate
On construction sites, joints usually fail early because of when they were sealed, not what was used. If sealant goes in before the last trades are through, it gets knocked, painted over or contaminated.
Site and facilities staff are often the first to spot these:
- Sanitary sealant damaged by following trades
- Window and door perimeters that won’t pass inspection
- A long mastic snag list close to completion
- Existing joints on a refurb that need cutting out and resealing
When a college such as St. Giles College (to the north-east of Highgate) builds or refurbishes, the mastic package normally has to fit around students and staff.
Questions to ask before you book
- Will failed sealant be removed rather than covered?
- Whether primer will be used where the manufacturer specifies it
- Are they CHAS accredited or on Constructionline?
- The named product and why it was chosen
Nearby places to Highgate
What else we do in Highgate
Highgate: questions and answers
Do you take on jobs in Highgate where loading and access are tightly controlled?
Yes. Inductions, permits and timed loading are routine for us in London. Send the building rules and access times with your enquiry. All of Greater London is inside the ULEZ, and our planning allows for it
Will you take on work at estates like Bush Industrial Estate, close to Highgate?
Yes. Estates, retail parks and business parks around Highgate, Bush Industrial Estate among them, are all within reach. To start, just ring 01277 525 020 or email us with the unit, the joints involved and your access times.
How long does a job like this take?
The duration is planned around your programme and the access we are given. You will have an expected duration with the quote.
Do your applicators hold CSCS cards?
We are CHAS accredited and a Constructionline member, and each applicator is CSCS-carded. Public liability insurance is in place.
How do we ask for a quote?
You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or use the quote form. Include photographs or drawings if you have them.
Do you install fire-rated sealant as part of a package?
We install fire-rated sealant where it is the specified product, working to the specification and the manufacturer’s installation guidance. We will flag if the detail needs a different product.
When can the area be used after sealing?
The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, and we confirm it before leaving site.
What happens if it’s left?
Patching snags as they appear can feel quicker than a proper close-out. A planned sweep of each plot or floor catches the lot in one go. We can run snagging as its own phase before handover. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well.
Why appoint us
- Work to your specification and the manufacturer’s guidance
- A Constructionline member, so easy to vet
- Fully insured
- One number for every site we cover
Read how commercial sealant jobs are priced or how we’re accredited.
On site: what to expect
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Planning a London job such as one in Highgate starts with access. Give us the hours we can be on site and we will schedule to suit.
- Drawings, the sealant specification and your programme come to us for pricing.
- We return a fixed quote that ties the mastic package to your programme.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- We seal each plot or floor as it’s released to us.
- Every joint is prepared, set to depth and sealed with the specified product.
- We close out snagging and hand over with a 12-month guarantee.
Getting the site ready
- Warn occupants and staff about the work
- Clear stock, furniture or equipment away from the joints
- Tell us what induction or permit system the site runs
Getting a fixed quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to call 01277 525 020 or email us with what you know.
Advice
Site staff or a sealant specialist?
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong typically costs more in the end than doing them right.
What sealant work can’t fix
Some faults sit outside our scope, and we say so rather than covering them up:
- Rework caused by others damaging completed areas
- Frame gaps too wide for sealant, which the installer needs to correct
- Defective windows, doors or glazing units (the supplier or installer’s job)
If in doubt, speak to us on 01277 525 020 or email the details over and we will say what we think.
What we seal
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Floor and skirting junctions
- Cladding and panel joints
- Window and door perimeters
- Brick and block movement joints