Construction and new-build mastic in North End, Greater London
Construction mastic in North End, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Failed sealant in an existing building being refurbished
- Cracks opening in caulked internal joints
- Different trades sealing to different standards
Construction mastic across North End
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Aftercare for building managers
Keep the joints in good shape with a few simple steps:
- Release areas for mastic once other trades have finished in them
- Share drawings and the specification as soon as possible
- Ask cleaners to use soft cloths around fresh sealant
- Record the products used in the O&M file
Our 12-month guarantee covers the workmanship from sign-off. Damage by others isn’t a workmanship fault.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Sealant stretched over an oversized gap won’t last so packing or adjustment by the installer comes first. We flag them as soon as we see them.
About our construction mastic in North End
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. We work on window and door perimeters, internal decorators’ caulk and floor and skirting junctions, and the failures we are asked to look at most are new external sealant already peeling away and a long mastic snag list close to completion. Searching for sealant specialists in North End? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
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.
A 12-month guarantee applies to all our work in Greater London. If an installation problem shows up, call the office on 01277 525 020 or email us and we’ll arrange a return visit.
- Location
- North End (NW3, NW11, N2)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Nearby places to North End
Also in North End
What the job involves on each surface
Snagging before handover
The last pass before handover is where mastic snags are cleared. Snags are cleared room by room, cutting out damaged joints and resealing them properly.
External facade and movement joints
Movement joints in the facade are sealed with a product suited to the expected movement. Depth is controlled with backing rod so the bead bonds to two sides only.
How a job runs
When we get to site, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before any cutting starts, with the work itself usually taking a day or two on a small fit-out and several weeks on a large multi-storey package. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We walk the site or review drawings to understand the package.
- 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.
Before we start on site
- Let us know about inductions and permits
- Confirm the product named in the specification
- Let building users know which areas are affected
Get a fixed quote
Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to call the office on 01277 525 020 or email us.
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Common questions from North End clients
Can you work around term dates at a campus such as American University in London?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. We’re CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.
Do you work in London buildings with loading restrictions?
Yes, most London buildings have access rules of some kind, and we plan around them. Share the building’s contractor rules and we’ll work to them. We allow for the ULEZ, which covers every borough
Do you have public liability insurance?
Yes. We are fully insured, and the certificate can go with your quote.
What happens if old sealant might contain asbestos?
Managing asbestos is the dutyholder’s responsibility, so for older buildings we ask for the asbestos register first. Work pauses if suspect material is found, until it has been tested.
What accreditations do you hold?
We’re CHAS accredited and a Constructionline member, and each applicator is CSCS-carded. Public liability insurance is in place.
Do you work in North End?
Yes. Sites across North End are covered, with one number for every area we cover.
What do you charge?
Each job is quoted on its own details. To get one, ring 01277 525 020 or send details through our quote form with a description of the work.
Building and refurbishing in North End
North End has a good number of hotels close by, all within 2 miles. Hotel extensions and refits usually have to fit around bookings, so mastic dates are tight. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in North End. Deliveries are booked and storage is tight, so mastic materials come in as needed.
For a contractor at a hotel such as Anchor House Hotel, which lies west of North End, the mastic often has to be finished before a reopening date. Projects at colleges like St. Giles College (1.9 miles east of North End) tend to run to term dates, so the mastic is planned tightly. Building work at universities like American University in London, 2.9 miles to the east of North End, is often timed for the summer, mastic included.
North End is about 1 mile north of Greenhill, in Greater London. Looking for construction mastic in North End? We can help, as we do across Greater London. We work across 764 places in Greater London. We also cover London, some 6 miles away.
We cover the NW3, NW11 and N2 postcode districts. Buildings on Sandy Road, Park Avenue and Platt's Lane are within our area for mastic packages. Main routes into North End include the A502. Just outside North End, we also work in Vale of Health (1 mile south-east), Childs Hill (1 mile south-west), Golders Green (1 mile north-west), Greenhill (1 mile south) and West Hampstead (1 mile south). A short drive away, we cover London (6 miles south-east), City of Westminster (4 miles south), Marylebone (4 miles south-east), Kensington (5 miles south), St Pancras (4 miles south-east) and Shoreditch (5 miles south-east).
Landmarks near North End
Locally, jobs take us to sites close to The Old Bull and Bush pub, Childs Hill Park and The Henrietta Barnett School, among other places. The closest station to North End is Hampstead Heath station, about 1.1 miles south-east of the centre. Other landmarks nearby include O2 Centre (1.4 miles south) and New End Hospital (0.7 miles south). Not far away are Turner's Wood and Darland's Lake.
For managing agents and facilities managers
Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. North End can form part of a wider programme.
Whether you’re a managing agent, a property factor or an owner’s representative: send details, get a fixed quote, we seal, guaranteed. Keys, access and contacts can be agreed in advance.
When to bring in a specialist
Putting right a botched joint often costs more than sealing it well at the start, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
Why it’s worth doing now in North End
Some packages split mastic across the window fitter, kitchen fitter and plumber. The result tends to be uneven finishes and arguments about who should seal what. One mastic subcontractor for the lot keeps it simple. In North End, each extra visit means more notices, permits and disruption, so a proper job first time, with the old sealant fully removed, is worth it.
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we’ll explain how it’s made up.
What you get with us
- CHAS accredited contractor
- Work to your specification and the manufacturer’s guidance
- Colour agreed before work starts
- One number for every site we cover