Mastic contractors in Hampstead
Our CSCS-carded applicators take on mastic packages for new-build and refurbishment projects in Hampstead and the surrounding area. Send photos or drawings for a fixed quote.
- Early adhesion failures on new external joints
- A mastic package split between trades with no clear owner
- Missed perimeter joints on a new elevation
Construction mastic for Hampstead sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic around Hampstead: how the place shapes the job
As part of Greater London, Hampstead is inside the ULEZ, which applies to every van on site. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. Hampstead has plenty of hotels close by, all within 2 miles. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
Building work at universities like Regent's University London, 2.1 miles to the south-east of Hampstead, is often timed for the summer, mastic included. For a contractor at a hotel such as Quality Hotel Hampstead, under half a mile south of Hampstead, the mastic often has to be finished before a reopening date.
Hampstead is about 3 miles north-west of City of Westminster, in Greater London. We cover Hampstead and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 764 places across Greater London fall within our area, Hampstead among them.
Business premises anywhere in NW3, NW6, NW11 and N2 are within our area for mastic packages. We cover commercial and managed buildings on Hampstead High Street, New End Square and The Mount Square. Hampstead sits on or close to the A1 and A502, which helps when planning parking and deliveries for the job. Just outside Hampstead, we also work in Greenhill (1 mile north-east), West Hampstead (1 mile west), Fortune Green (1 mile west), Vale of Health (1 mile north) and South Hampstead (1 mile south). A short drive away, we cover London (5 miles south-east), City of Westminster (3 miles south-east), Marylebone (3 miles south-east), Kensington (4 miles south), St Pancras (3 miles south-east) and Shoreditch (5 miles south-east). As one of the bigger centres in Greater London, Hampstead has a broad mix of commercial, public and industrial buildings, and we cover them all.
What’s near Hampstead
We work on buildings around South Hampstead High School, Kilburn Grange Park and St Anthony's Preparatory School and the streets around them. Other local landmarks include King William IV Public House (under half a mile north-east) and Cecil Sharp House (1.7 miles south-east). Hampstead has its own railway station: Finchley Road & Frognal station. A little further out are Isokon Gallery (0.8 miles east) and New End Hospital (under half a mile north). Not far away are Belsize Wood and The Long Water.
Construction mastic for commercial buildings in Hampstead
We work to the specification and the programme rather than whatever product is to hand. Where the specification names a product, we use it; any alternative we suggest is put to you before anything changes. Joint widths, backing, primers and tooling follow the manufacturer’s guidance. If you have sanitary sealant damaged by following trades and frame perimeters left unsealed or poorly sealed, we can help, on cladding and panel joints, brick and block movement joints and sanitary and kitchen joints alike. Most enquiries from Hampstead start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.
A great deal of London construction is refurbishment of occupied or part-occupied buildings, alongside new blocks. New frames, overcladding and fit-outs all end in perimeter and facade joints, frequently with occupants close by, so tidy, well-planned work matters.
A 12-month guarantee applies to all our work in Greater London. Should something we installed fail, give us a call on 01277 525 020 or send details through our quote form and we will come back to it.
- Place
- Hampstead (NW3, NW6, NW11, N2)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
When to bring in a specialist
Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
When to call us in Hampstead
Frames installed with uneven gaps make perimeter sealing harder. Sealant has a range of joint widths it can cope with, so gaps outside that range need sorting by the installer first. We flag them early rather than filling them with sealant that won’t last.
It’s worth sending us details if you spot any of the following:
- Caulk cracking where joints are moving more than expected
- External joints sealed in damp or cold conditions that are now failing
- Sealant knocked or painted over by other trades
- Frame perimeters left unsealed or poorly sealed
Extensions at sites like Royal Free Hospital (to the east of Hampstead) normally sit beside working departments, and the mastic follows strict access rules.
Comparing quotes
- How the joint faces will be prepared and primed
- Who will actually carry out the work
- Which product they’ll use, and why it suits the joint
- How they’ll work around occupants
When it isn’t the sealant
Being straight saves everyone time. Fresh joints won’t solve:
- Frames fitted out of tolerance
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
- Faulty frames rather than failed sealant
If in doubt, call the office on 01277 525 020 or send details through our quote form and we’ll say what we think.
Where we work in Hampstead
- Floor and skirting junctions
- Brick and block movement joints
- Internal decorators’ caulk
- Cladding and panel joints
- Window and door perimeters
- Sanitary and kitchen joints
Leave it or put it right?
Some packages split mastic across the window fitter, kitchen fitter and plumber. In practice it often means different standards, gaps in responsibility and snags nobody owns. One mastic subcontractor for the lot keeps it simple. In a London building, a failed joint rarely affects only one party: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Why clients in Hampstead choose us
- Work carried out by CSCS-carded applicators
- Public liability insurance in place
- Sealing commercial buildings since 2005
- Colour options checked against the specified product
Read how commercial sealant jobs are priced or our accreditations and insurance.
Questions about Hampstead
Can you work on a hospital site such as Royal Free Hospital?
Yes, hospitals are one of the sectors we cover. We follow the site’s permits, sign-in and infection-control procedures in every area.
Could you schedule work at a campus like Regent's University London for the vacation?
Yes. Education sites usually want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Can you clear a mastic snag list before handover?
Yes, we can. Send the snag list or photos and we’ll price it, with the work timed to your handover date.
Do you take on small jobs?
Small jobs are welcome alongside larger packages. Photos and a description are enough to start.
How do you work with the site programme?
The programme sets the job. Tell us the sequence and we will plan applicators around it.
Can you fit around our working hours?
Give us your site hours and any access windows in your enquiry, and we’ll schedule the work to suit. Our office runs Monday to Friday, 8am until 5pm.
Does the weather affect the work?
It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.
Building owners, agents and FMs in Hampstead
For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
Building owners and managing agents use us on sealant work across single buildings or whole portfolios. Several sites can go on one quote, which keeps the paperwork simple.
Nearby places to Hampstead
Other services in Hampstead
How a job runs
When we get to site, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before any cutting starts, and the work normally takes a day or two on a small fit-out and several weeks on a large multi-storey package. In Hampstead, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- We walk the site or review drawings to understand the package.
- A fixed quote sets out scope, products and phasing.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- Sealing follows the programme as areas are released.
- Problems we find, such as oversized gaps, are raised straight away.
- Final snagging is completed and the 12-month guarantee applies.
Preparing the site
- Let us know about inductions and permits
- Send your site hours and access windows
- Point out any areas we must not close
Ask for a quote
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, give us a call on 01277 525 020 or use the quote form.