Construction and new-build mastic in South Hampstead, Greater London
Mastic packages for new-build and refurbishment projects in South Hampstead. CHAS accredited and fully insured, with a 12-month guarantee.
- External joints sealed in damp or cold conditions that are now failing
- A mastic package split between trades with no clear owner
- Frame perimeters left unsealed or poorly sealed
Construction mastic near South Hampstead
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic for commercial buildings in South Hampstead
The programme rarely stands still, so the mastic package has to flex with it. We agree a sequence at the start and adjust it as the site manager releases areas. That keeps the work right first time and saves rework. We work on floor and skirting junctions, window and door perimeters and internal decorators’ caulk, and the failures we’re asked to look at most are internal caulk splitting as the building dries out and frame perimeters left unsealed or poorly sealed. For commercial sealant work in South Hampstead, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.
The ULEZ covers the whole of Greater London, so contractors’ vehicles on a job in South Hampstead must meet its standards or pay the daily charge. Alongside that, sites typically need booked deliveries and a plan for where materials go.
The 12-month guarantee is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we are clear about what is covered before work starts.
- Place
- South Hampstead (NW3, NW8, NW6)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Quote
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in South Hampstead
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
CHAS accredited and a Constructionline member, we’re straightforward to vet for your supplier list. We are fully insured, and our insurance certificate can go with the quote.
Construction mastic around South Hampstead: what changes locally
Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in South Hampstead. Deliveries are booked and storage is tight, so mastic materials come in as needed. There are plenty of hotels within about 2 miles of South Hampstead. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades.
Extensions at sites like Hospital of St John and St Elizabeth (to the south of South Hampstead) normally sit beside working departments, and the mastic follows strict access rules. Hotels like Marriott Hotel Regent's Park (to the east of South Hampstead) rarely close for long, so refurbishment mastic is phased floor by floor. Units on estates such as Regis Road Business Park, 1.4 miles to the north-east of South Hampstead, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
South Hampstead is about 1 mile south of Hampstead, in Greater London. South Hampstead sits inside our coverage and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Our Greater London coverage takes in 764 places, from busy centres to rural villages.
We cover the NW3, NW8 and NW6 postcode districts for mastic packages. We cover commercial and managed buildings on Avenue Road, Acacia Road and Harben Road and the roads nearby. Just outside South Hampstead, we also work in Swiss Cottage (1 mile north), St John's Wood (1 mile south), Haverstock (1 mile east), Belsize Park (1 mile east) and Primrose Hill (1 mile east). Bigger towns within reach include London (4 miles south-east), Kensington (3 miles south-west), St Pancras (3 miles south-east), Shoreditch (4 miles east), Walthamstow (7 miles north-east) and Hoxton (4 miles east).
Around South Hampstead
In South Hampstead, that means premises near Cafe Med pub, St. Mary's Town and Country School and Holy Trinity CofE Primary School, among other places. You will also find Cecil Sharp House (1.1 miles east) and Primrose Hill (0.6 miles east). South Hampstead has its own railway station: South Hampstead station. Nearby you’ll also find Isokon Gallery (0.8 miles north-east) and O2 Centre (0.5 miles north-west). Not far away are Adelaide Nature Reserve and The Long Water.
Our process
Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then handed back before the next one starts. Most London premises stay occupied while we’re on site, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- Site paperwork is confirmed and our CSCS-carded applicators are inducted.
- We seal plot by plot or floor by floor in line with the programme.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Preparing the site
- Confirm the product named in the specification
- Arrange parking or a loading space
- Agree which areas must stay open
Ask for a quote
Pricing a project or setting a maintenance budget? We will quote against your scope and drawings that you can work with. If you have questions first, speak to us on 01277 525 020 or send photos by email.
Related advice
What we can’t put right
Some faults sit outside our scope, and we say so rather than covering them up:
- Designing joint widths or choosing the specification (that sits with the designer)
- Deciding which fire-stopping product a penetration needs
- Frame gaps too wide for sealant, which the installer needs to correct
Not sure which it is? You can call the office on 01277 525 020 or email us and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Floor and skirting junctions
- Internal decorators’ caulk
- Window and door perimeters
- Cladding and panel joints
- Sanitary and kitchen joints
- Brick and block movement joints
Places near South Hampstead
More services for South Hampstead
When to bring in a specialist
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Looking after the joints
For the best life from the joints:
- Check frame gaps are within the sealant’s range before sealing
- Put any product change through the designer first
- Keep scrapers and abrasive pads off new beads
- Protect sealed areas from following trades
The package carries our 12-month guarantee for workmanship. Damage by others isn’t a workmanship fault which is why protection after sealing matters.
Leaving the mastic snag list to the end squeezes everyone. A planned close-out through each area as it completes keeps the list short.
What affects the price in South Hampstead
What shapes the price:
- The site’s rules and procedures
- Removal of failed or old sealant
- Quantities, in metres or numbers
- Distance, for remote addresses
No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.
What to include in your enquiry
To price the job accurately, we need a clear picture of the site. Send us:
- The site address and postcode
- A wide shot and a close-up of the area
- How the joints are reached, and at what height
- Approximate linear metres or a joint schedule
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 a schedule or drawings with what you know.
Questions we’re asked in South Hampstead
Is Regis Road Business Park, near South Hampstead, within your area?
Yes. Our area takes in South Hampstead and its surroundings, with estates and business parks such as Regis Road Business Park included. Photos and a short description are enough for a first look.
Can you work around term dates at a campus such as Regent's University London?
Yes. We plan campus work around teaching, exams and residence turnarounds. Let us know which documents your site asks for, and we’ll confirm them alongside the quote.
How long before the joints can be used?
The product and site conditions decide that. Some products skin over quickly but need longer to cure fully, so we’ll confirm the curing time on the day.
How much does the work cost?
There isn’t a price list, as every site differs. Send photos or drawings and we’ll price it at a fixed figure.
Do you offer coloured sealant?
That depends on the product. Some ranges are wide, others limited, so the available colours are confirmed with the quote.
How many days will you need on site?
That varies with the scale of the job, but the work normally takes as long as the agreed sequence needs, which comes down to joint lengths, access and handover dates. Larger or phased jobs take longer, and we will give you a timescale with the quote.
Does weather affect external mastic work?
Outside, the joint has to be dry and the temperature within the product’s limits. Damp, frost or condensation on frames can stop work so we normally switch to internal work when that happens.