Construction Mastic in Hendon
We carry out mastic packages for new-build and refurbishment projects in Hendon and the surrounding area. Send details for a fixed quote.
- External joints sealed in damp or cold conditions that are now failing
- Frame perimeters left unsealed or poorly sealed
- Internal caulk splitting as the building dries out
Construction mastic near Hendon
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
General trades versus 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. That’s why many clients bring in a specialist from the beginning.
The visible bead is only part of the job. Backing rod, primer where specified and a joint designed to move with the building are easy to get wrong without experience.
About our construction mastic in Hendon
The programme rarely stands still, so the mastic package has to flex with it. The sequence is set with the site team and updated as plots or floors are handed over. Sealing too early only means coming back once others have damaged it. We work on internal decorators’ caulk, brick and block movement joints and sanitary and kitchen joints, and the failures we’re asked to look at most are external joints sealed in damp or cold conditions that are now failing and inconsistent sealant finishes from plot to plot. Facilities teams, main contractors and managing agents in Hendon tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
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. Should something we installed fail, call the office on 01277 525 020 or send photos by email and we’ll come back to it.
- Location
- Hendon (NW4, NW9, NW2, NW11)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Quoted before any work starts
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What sets the cost
We price every job individually. The things that drive the figure:
- Phasing around occupants
- Removal of failed or old sealant
- Any access equipment needed
- Site requirements such as inductions and permits
The specified product makes a difference, as does the preparation each joint needs, from cutting out to priming and backing rod. Access, phasing and site rules also count.
What we need to price the job
A few photographs plus some basic facts will normally do. Please tell us:
- Whether the building will be occupied during the work
- Anything awkward about access or site hours
- Whether an asbestos survey exists
- The postcode of the building
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. If you have questions first, give us a call on 01277 525 020 or email a schedule or drawings.
Diagnose, treat, sign off
Diagnose, treat, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. For a job in Hendon, access comes first: booked loading, goods lifts, the building’s permit system and a spot to keep materials. Give us the hours we can be on site and we’ll schedule to suit.
- Drawings, the sealant specification and your programme come to us for pricing.
- A fixed quote sets out the scope, the products and the sequence.
- You tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we confirm it with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Every joint is prepared, set to depth and sealed with the specified product.
- Before handover, snags are dealt with and the package is signed off under our 12-month guarantee.
What we need from you
- Let us know about inductions and permits
- Agree which areas must stay open
- Tell staff and tenants when we will be in
Quotes
For a fixed quote, phone 01277 525 020 or email the details over, telling us the site location and the nature of the job. Our quote form is another easy route.
Advice
What else we do in Hendon
Construction mastic in Hendon: the local picture
A good number of hotels sit less than 2 miles from Hendon. When hotels extend or refit, the work is normally squeezed between peak periods, mastic included. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Hendon. Delivery slots and scarce storage shape how and when the mastic goes in.
For contractors refurbishing units at places like Brent Cross Shopping Park, 0.9 miles south of Hendon, the mastic covers cladding panels, roller-door and window perimeters. New wings at hospitals like BMI Hendon Hospital (0.6 miles north of Hendon) bring long runs of window and panel joints to seal.
Hendon is about 3 miles north-west of Hampstead, in Greater London. Across the NW4 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 764 places in Greater London, from busy centres to rural villages. There’s a separate page for London, roughly 8 miles from Hendon.
Commercial sites across NW4, NW9, NW2 and NW11 are covered. We cover commercial and managed buildings on Church Road, Station Road and Sydney Grove. Access to Hendon is via the A5 and A41. If your building is just outside Hendon, we cover The Burroughs (1 mile north-west), Brent Cross (1 mile south), Staples Corner (1 mile south), West Hendon (1 mile west) and The Hyde (1 mile west). A short drive away, we cover London (8 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
What’s near Hendon
Locally, jobs take us to sites close to Hasmonean Primary School, The White Bear pub and Kisharon College and the streets around them. The closest station to Hendon is Hendon station, roughly 0.7 miles south-west of the centre. Other landmarks nearby include Brent Cross Shopping Centre (0.5 miles south) and St Andrew's Hospital (1.6 miles south). The countryside around Hendon includes Darland's Lake and Parliament Hill.
Different surfaces, different methods
External facade and movement joints
Many facade substrates need a primer before sealing. We prime where the manufacturer specifies and work only when conditions suit.
Fire-rated sealant where specified
Fire-rated sealant is one type of fire-stopping product. Other products are used for some services and gaps so we will flag where the detail needs something different. Record requirements are agreed with the quote.
FAQs: Hendon
Can work at a site such as Middlesex University fit around teaching?
Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.
Is hospital work, at somewhere like BMI Hendon Hospital, something you do?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure.
Do you offer coloured sealant?
In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We confirm what’s available for the specified product when we quote.
Will you quote for a small job?
Small jobs are welcome alongside larger packages. Photos and a description are enough to start.
Can you send site paperwork?
Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we will confirm with the quote.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
What we’re called out for in Hendon
A joint without backing rod or bond-breaker often fails early. Fixed to three faces, the sealant rips the first time the joint opens, so depth is controlled with backing rod or bond-breaker tape.
Things that normally lead to an enquiry:
- External joints sealed in damp or cold conditions that are now failing
- Oversized or tapered gaps around new frames
- Frame perimeters left unsealed or poorly sealed
- Internal caulk splitting as the building dries out
For a contractor at a hotel such as The Pillar Hotel, less than half a mile east of Hendon, the mastic often has to be finished before a reopening date.
Comparing quotes
- How they handle RAMS and site documents
- What level of public liability insurance do they hold?
- How the joint faces will be prepared and primed
- Are they CHAS accredited or on Constructionline?
What sealant work can’t fix
Sealant solves a lot, but not everything, and we’re upfront when that’s the case. These need a different solution:
- Fire-stopping design or sign-off (that’s for the designer, fire engineer and building control)
- Defective windows, doors or glazing units (the supplier or installer’s job)
- Damage to finishes by other trades after we’ve sealed
If in doubt, phone 01277 525 020 or email us and we’ll say what we think before you book.
Joints and surfaces we work on
- Window and door perimeters
- Internal decorators’ caulk
- Sanitary and kitchen joints
- Cladding and panel joints
- Floor and skirting junctions
- Brick and block movement joints