Construction and new-build mastic in Swiss Cottage, Greater London
Our CSCS-carded applicators take on mastic packages for new-build and refurbishment projects in Swiss Cottage. Send details for a fixed quote.
- Bath and shower joints scraped during the final clean
- Old sealant on a refurbishment that needs stripping before new work
- A long mastic snag list close to completion
Need construction mastic in Swiss Cottage?
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
When to call us in Swiss Cottage
Shrinkage and settlement in the first months put new joints under strain. Materials lose construction moisture and shrink. Picking a flexible sealant where there’s movement keeps snags down.
Any of the following is a good reason to get the joints checked over:
- Bath and shower joints scraped during the final clean
- Oversized or tapered gaps around new frames
- Cracks opening in caulked internal joints
- Early adhesion failures on new external joints
Recladding or extending a unit at a site like Regis Road Business Park (1.4 miles north-east of Swiss Cottage) brings panel joints and frame perimeters into the programme.
Before you book anyone
- What the guarantee covers, and for how long
- Will CSCS-carded applicators be on site?
- Whether primer will be used where the manufacturer specifies it
- Proof of insurance
Construction mastic in Swiss Cottage, done properly
A typical mastic package covers more than window perimeters: frame perimeters inside and out, caulking to trims and boards where the specification calls for it, sanitary silicone, kitchens, and the final snag list. One contractor for all of it keeps the responsibility in one place, and one applicator team gives a consistent finish. Most enquiries involve missed perimeter joints on a new elevation and inconsistent sealant finishes from plot to plot, across floor and skirting junctions, sanitary and kitchen joints and window and door perimeters. One point of contact handles commercial sealant work in Swiss Cottage from the first photographs to the final walk-round, whether it’s one building or several.
Construction in a London area such as Swiss Cottage means working on constrained sites: small compounds, delivery slots and shared hoists and scaffold. We fit around the programme, sealing each elevation or floor as other trades hand over.
Every job is signed off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.
- Location
- Swiss Cottage (NW3, NW8, NW6)
- Wider area
- Greater London
- Cover
- 12 months on our workmanship
- Quotes
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Places near Swiss Cottage
What else we do in Swiss Cottage
After the work
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. We suggest:
- Plan external elevations with the weather in mind
- Don’t schedule sealing before decorators and flooring are done
- Put any product change through the designer first
- Get the mastic subcontractor involved early in the programme
Once an area is sealed, protect it from following trades. Fresh sealant needs its cure time before it’s cleaned, painted near or knocked; we confirm the time for each product.
Leaving the mastic snag list to the end squeezes everyone. Clearing snags area by area spreads the work out and keeps handover on track.
Honest limits
Some faults sit outside our scope, and we say so rather than covering them up:
- Joint design decisions that belong to the architect or engineer
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
- Frame gaps too wide for sealant, which the installer needs to correct
Not sure which it is? You can ring 01277 525 020 or email us and we’ll tell you honestly before you book.
Joints and surfaces we work on
- Internal decorators’ caulk
- Floor and skirting junctions
- Cladding and panel joints
- Window and door perimeters
- Brick and block movement joints
- Sanitary and kitchen joints
New build and refits around Swiss Cottage
Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Swiss Cottage. Add booked deliveries and tight storage, and the mastic package needs planning with the site team. The area within 2 miles of Swiss Cottage holds plenty of hotels. Hotel extensions and refits typically have to fit around bookings, so mastic dates are tight.
Building work at universities like Regent's University London (1.4 miles south-east of Swiss Cottage) is often timed for the summer, mastic included. For contractors at a college like City of Westminster College, 1.3 miles south-west of Swiss Cottage, perimeters and internal sealant are timed for the holidays.
Swiss Cottage is about 1 mile south of Hampstead, in Greater London. If you’re looking for construction mastic in Swiss Cottage, we can help, as we do across Greater London. 764 places across Greater London fall within our area, including Swiss Cottage.
We cover the NW3, NW8 and NW6 postcode districts for mastic packages. Buildings on Avenue Road, Acacia Road and Harben Road are within our area. We also cover South Hampstead (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) for mastic packages. A short drive away, we cover 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).
Local landmarks in Swiss Cottage
Locally, jobs take us to sites close to Cafe Med pub, Holy Trinity CofE Primary School and Primrose Hill and the streets around them. Nearby too are Cecil Sharp House (1.1 miles east) and St. Mary's Town and Country School (under half a mile north-east). There’s a railway station in Swiss Cottage itself: South Hampstead station. Other landmarks nearby include Montfichet's Tower (3.7 miles south-east) and Isokon Gallery (0.8 miles north-east). Open spaces near Swiss Cottage include The Long Water and Primrose Hill.
Different surfaces, different methods
Kitchens and utility areas
Worktop upstands, sinks and splashbacks are sealed once the kitchen is fitted. The sealant is a kitchen-grade product and hygienic or food-safe grades wherever food contact is possible.
Bathrooms, en suites and washrooms
On multi-unit schemes, consistency matters across hundreds of bathrooms. A single team keeps the standard consistent, plot by plot or floor by floor.
Diagnose, treat, sign off
Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Any old material is cut back to clean, sound faces, the manufacturer’s primer is applied where it’s called for, and the sealant is tooled off neatly. All of Greater London is in the ULEZ, and kerbside space in Swiss Cottage can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- We walk the site or review drawings to understand the package.
- A fixed quote sets out scope, products and phasing.
- Paperwork is agreed and applicators are inducted on site.
- We seal plot by plot or floor by floor in line with the programme.
- Problems we find, such as oversized gaps, are raised straight away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
Getting the site ready
- Point out any areas we must not close
- Have the specification and drawings to hand
- Tell staff and tenants when we will be in
Ask for a quote
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we will return a fixed quote that you can work with. For a chat about it beforehand, call the office on 01277 525 020 or send details through our quote form.
Related advice
Owners, agents and contractors
For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.
Common questions from Swiss Cottage clients
Can you cope with the access rules in a London building?
Yes, most London buildings have access rules of some kind, and we plan around them. Send the building rules and access times with your enquiry. The ULEZ covers the whole of Greater London, which we allow for
Do you cover business parks and estates near Swiss Cottage, such as Regis Road Business Park?
Yes, sites like Regis Road Business Park are within our area, along with the rest of Swiss Cottage. A few photographs and the unit address let us price the work.
Do you use the sealant named in the specification?
Specification first, then the maker’s instructions. Primers, backing and joint depth follow what the manufacturer sets out.
How much does the work cost?
That depends on the job: quantities, access, the product and any phasing. Call for a quote and we’ll price it properly.
What happens if old sealant might contain asbestos?
Managing asbestos is the dutyholder’s responsibility, so we will ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.
What site paperwork can you supply?
Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.
Do you do fire-rated sealing on new builds?
It can be part of the package where specified. Tell us what records you need and we will confirm with the quote.