Hendon mastic sealing
Mastic sealing for building owners, managing agents and housing associations in Hendon. CHAS accredited and fully insured, with a 12-month guarantee.
- Brittle perimeter mastic across a building
- Damp patches beside frames
- Estate-wide sealant that is simply worn out
Mastic sealing near Hendon
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Blocks and managed buildings in Hendon
Blocks in London are normally run by managing agents, landlords or housing associations, with residents to notify and access to arrange. We work to your notice and access plan. The 2 miles around Hendon include four care or nursing homes. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings.
Buildings close to stations like Hendon station, 0.7 miles to the south-west of Hendon, are often flats over shops, with frame mastic to keep sound. Churches, halls and community buildings such as Christ Church Hendon are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.
Hendon is about 3 miles north-west of Hampstead, in Greater London. We cover Hendon and the rest of Greater London, with the same fixed quotes and 12-month guarantee as everywhere else. Hendon is one of 764 places in Greater London on our list for mastic joints. There’s a separate page for London, roughly 8 miles from Hendon.
If you need mastic sealing in NW4, NW9, NW2 and NW11, the process matches everywhere else we work: send details, get a quote, we seal, guaranteed. Among the streets we cover are Church Road, Station Road and Sydney Grove, and sites on any of them can send details for a fixed quote. Hendon sits on or close to the A5 and A41, which helps when planning parking and deliveries for the job. Close to Hendon, our area also takes in 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). Further afield, our area takes in 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
We work on buildings around Hasmonean Primary School, The White Bear pub and Kisharon College and the streets around them. The nearest railway station is Hendon station, roughly 0.7 miles south-west. Well-known places in the area include Brent Cross Shopping Centre (0.5 miles south) and St Andrew's Hospital (1.6 miles south). For a walk, there’s Darland's Lake and Parliament Hill.
Mastic sealing in Hendon
For over 20 years we have resealed joints for owners, agents and landlords. Our applicators are CSCS-carded, and the work is backed by public liability insurance. Resealed mastic joints in Hendon carry our 12-month guarantee. The enquiries we see most involve repeated reactive repairs to the same buildings and the same joint failures repeated across a portfolio, across external wall and movement joints, shopfronts below residential blocks and communal kitchens and washrooms. For commercial sealant work in Hendon, you deal with one contact from quote to sign-off, whether it’s one building or several.
Planning mastic work on a London block means notices to residents, access to flats and agreed working areas. We work to the agent’s notice and access plan, so residents know what’s happening.
Our 12-month guarantee is about workmanship, not 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.
- Location
- Hendon (NW4, NW9, NW2, NW11)
- Region
- Greater London
- Cover
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Questions about Hendon
Do you work in occupied care homes around Hendon?
Yes. We work around residents’ routines, a room or two at a time. Noise and disruption are kept to a minimum.
Does your area include sites such as Brent Cross Shopping Park, near Hendon?
Yes. Estates, retail parks and business parks around Hendon, Brent Cross Shopping Park among them, are all within reach. Photos and a short description are enough for a first look.
What if the old mastic contains asbestos?
Asbestos removal isn’t part of our work. Anything suspect is tested before we carry on, and the duty to manage asbestos sits with the dutyholder.
What paperwork can you provide?
Our credentials include CHAS, Constructionline and public liability insurance. Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.
Do you work in Hendon?
Yes. We cover Hendon, within our coverage of Greater London, South East England and Scotland. To discuss a job, call 01277 525 020 or send details through our quote form.
Will you come and look before quoting?
That depends on the size and complexity of the job. Simple work can often be priced from photos, and bigger or more complex jobs typically get a visit.
Who decides which product is used?
A specification, where there is one, decides it. Without one, the joint decides: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
Common problems we fix in Hendon
The edges of the material itself sometimes break away, such as crumbling render, brick arrises or frame edges. If the edges are unsound, we say so before quoting the sealing.
Look out for the following:
- Failed external movement joints
- Water getting in round frames after rain
- The same joint failures repeated across a portfolio
- Old repairs sealed over failed mastic
Schools and community buildings such as Hendon School need frame and external mastic kept sound like any building.
What to look for in a quote
- Proof of insurance
- Whether their applicators hold CSCS cards
- Do they follow the manufacturer’s priming guidance?
- Their plan for phasing and protecting the area
For managing agents and facilities managers
Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules.
Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
What happens if it’s left?
Reacting to every complaint means sending someone out block by block. Planned resealing covers a whole building or estate in one go, under a single quote and a single programme. Access in London is hard enough to arrange once, so it makes sense to deal with every failing joint while access is in place.
There’s no price list, since every building and every scope is different. Call for a quote and we’ll price your job on its own details.
What you get with us
- Work carried out by CSCS-carded applicators
- A range of standard colours, depending on the product
- Failed material removed, not covered up
- One contact handling all your sites
See how commercial sealant jobs are priced or our accreditations.
From enquiry to sign-off
A typical day starts with protection: masking tape along the joint edges and sheeting over anything nearby. The work itself normally takes anything from a day to a few weeks, depending on the number of buildings and joints, and our waste is bagged and taken away as we go. In Hendon, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First comes a look at the joints and, for older buildings, the asbestos records.
- A fixed quote covers the joints, products and order of work.
- We strip out the old sealant.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
Getting the site ready
- Arrange parking or a loading space
- Tell us what induction or permit system the site runs
- Tell us your opening times and when work is allowed
Quotes
Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photos and a few notes.
Read more
When to bring in a specialist
A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
Towns and villages near Hendon
Other services in Hendon
Honest limits
We check first that sealant really is the fix. It isn’t the answer for:
- Asbestos-containing sealant, which we don’t remove
- Failed window or door frames, which need a window contractor
- Misted or failed double-glazed units
Not sure which it is? You can ring 01277 525 020 or email us and we’ll tell you honestly.
Surfaces we seal
- Communal kitchens and washrooms
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- External wall and movement joints
- Balcony and threshold joints
- Communal entrances and stairwells