Construction and new-build mastic in North End, Greater London
Need construction mastic in North End? It’s simple: send details, get a quote, we seal, guaranteed.
- Window and door perimeters that won’t pass inspection
- 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 North End sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Our process
In a busy building, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed before we move to the next. For a job in North End, access comes first. Send the building rules and access times with your enquiry.
- Drawings, the sealant specification and your programme come to us for pricing.
- You receive a fixed quote listing scope, products and phasing.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Joints are cleaned, primed where the maker requires it, backed and sealed to the specification.
- Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.
Before we start on site
- Arrange parking or a loading space
- Move anything stored against the joints
- Tell staff and tenants when we will be in
Ask for a quote
Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we will arrange one.
Advice
Construction mastic in North End
Perimeter sealing outside needs a dry joint and the right temperature. Each sealant has a temperature range, and damp, frost or condensation on frames stops work, so we plan elevations with the forecast and the programme in mind. Internal sealing often fills those days. We work on cladding and panel joints, window and door perimeters and sanitary and kitchen joints, and the usual reasons a site gets in touch are bath and shower joints scraped during the final clean and existing joints on a refurb that need cutting out and resealing. A single leaking joint is often how a building in North End first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.
Building sites in London tend to be tight: limited storage, booked deliveries and access shared with other trades. We fit around the programme, sealing each elevation or floor as other trades hand over.
Work we carry out in Greater London comes with a 12-month guarantee. If an installation problem shows up, speak to us on 01277 525 020 or email the details over and we’ll arrange a return visit.
- Location
- North End (W14, SW6, SW5)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Page updated
- 3 November 2026
Honest limits
Our job is the joint, not everything around it. On its own, sealant can’t deal with:
- Damage to finishes by other trades after we’ve sealed
- Deciding which fire-stopping product a penetration needs
- Faulty frames rather than failed sealant
If in doubt, phone 01277 525 020 or email the details over and we’ll say what we think.
What we seal
- Cladding and panel joints
- Internal decorators’ caulk
- Window and door perimeters
- Floor and skirting junctions
- Brick and block movement joints
- Sanitary and kitchen joints
Also near North End
Other services in North End
Why it’s worth doing now in North End
A cheaper sealant can look like an easy saving on a large package. A failed joint in the defects period costs far more than the product difference, especially externally. We price the specified product and will tell you plainly where an alternative would or wouldn’t work. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
The product called for affects the cost, and so does the preparation, from cutting out to priming and backing rod. Access, phasing and site rules also count.
Why clients in North End choose us
- Joints cleaned back to sound surfaces
- Products installed to the manufacturer’s instructions
- Work carried out by CSCS-carded applicators
- Fixed quotes based on photos, drawings or a visit
See what affects the cost and our accreditations.
What the job involves on each surface
Internal decorators’ caulk
Caulking is often done in a hurry by whoever’s on site. A neat, consistent caulk line makes the decorators’ job quicker and keeps the snag list down.
Window and door perimeters
Inside, a paintable sealant or decorators’ caulk is used where the joint doesn’t move much. The specification decides which with colours matched to the frame where needed.
Questions about North End
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. Share the building’s contractor rules and we will work to them. All of Greater London is inside the ULEZ, and our planning allows for it
Could you schedule work at a campus like University of Westminster for the vacation?
Yes. We plan campus work around teaching, exams and residence turnarounds. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Do you have public liability insurance?
Yes. Our insurance certificate can be sent alongside the quote.
Do you install fire-rated sealant as part of a package?
Where the specification calls for fire-rated or intumescent sealant around service penetrations or linear gaps, we install it to the manufacturer’s tested details. Fire-stopping design and sign-off sit with the designer and building control.
How do you choose the sealant?
If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Can staff carry on working while you’re here?
Yes, as long as we plan it. Tell us your site hours and access windows and we’ll plan around them.
Will you just go over the old sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, since fresh sealant will not bond reliably to aged material.
Cost factors for mastic packages
The price varies from site to site. Expect it to depend on:
- The total length or number of joints
- How accessible the joints are
- Whether the work must be split into stages
- Specialist products, such as fire-rated or hygienic sealants
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
What we need to price the job
Diagnosis starts before we arrive. Let us know:
- The site address and postcode
- Rough lengths or quantities, or drawings if you have them
- The product your specification calls for
- Photos of the joints, close up and from further back
Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. If you have questions first, ring 01277 525 020 or send photos by email.
New build and refits around North End
The ULEZ covers the whole of Greater London, North End included, so site vehicles need to meet its standards or pay the daily charge. Add booked deliveries and tight storage, and the mastic package needs planning with the site team. There are plenty of hotels within about 2 miles of North End. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up.
Hotels like Kensington West Hotel (to the north of North End) rarely close for long, so refurbishment mastic is phased floor by floor. For a contractor working at a hospital such as Charing Cross Hospital (0.6 miles south-west of North End), perimeter and facade sealing is planned around patients and deliveries. Projects at colleges like St Mellitus Theological College (to the east of North End) tend to run to term dates, so the mastic is planned tightly.
North End is about 1 mile south of Kensington, in Greater London. Any commercial site in North End is covered, for single jobs and planned programmes alike. Our Greater London coverage takes in 764 places, large and small.
Anyone looking for construction mastic in W14, SW6 and SW5 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Sun Road, Star Road and Field Road are within our area for mastic packages. Close to North End, our area also takes in West Kensington (1 mile east), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). A short drive away, we cover London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Around North End
Locally, jobs take us to sites close to Seven Stars pub, Polish Library POSK in London and Avonmore Primary School. The closest station to North End is Kensington Olympia station, about 0.5 miles north. A little further out are Hammersmith Broadway (0.7 miles west) and Montfichet's Tower (4.8 miles east). Green spaces nearby include WWT London Wetland Centre and Campden Hill.
General trades versus a specialist
There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.
For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.