Mastic Sealing in Lissenden Gardens
Mastic sealing for building owners, managing agents and housing associations in Lissenden Gardens and across Greater London. CHAS accredited and fully insured, with a 12-month guarantee.
- A mix of products and colours from past repairs
- Repeated reactive repairs to the same buildings
- The same joint failures repeated across a portfolio
Need mastic sealing in Lissenden Gardens?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
For managing agents and facilities managers
Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Sites in Lissenden Gardens can sit alongside others in a wider programme.
Mastic sealing in Lissenden Gardens
Most buildings come with mastic joints nobody has looked at since handover and it slowly wears out: window perimeters, door frames, external joints and communal junctions all rely on it. When it hardens, splits or pulls away, water and draughts follow, and occupiers start reporting it. The enquiries we see most involve window mastic that has split and shrunk and failed external movement joints, across shopfronts below residential blocks, communal kitchens and washrooms and external wall and movement joints. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Lissenden Gardens, preparation and product choice get the time they need.
London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Window and door perimeters, balcony joints and communal areas all have mastic that ages together across a building, which is why block-wide programmes make sense.
Every job is signed off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Where
- Lissenden Gardens (NW5, NW3, N19)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Quotes
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
What happens if it’s left?
Piecemeal repairs over the years often leave mismatched sealant. A block-wide reseal gives one product, one colour and one guarantee. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
We don’t publish prices, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.
Why clients in Lissenden Gardens choose us
- Fixed quotes based on photos, drawings or a visit
- Over 20 years of commercial sealing
- A Constructionline member, so easy to vet
- Colours chosen to suit frames, cladding or finishes where possible
Read our cost guide or how we’re accredited.
Nearby places to Lissenden Gardens
What else we do in Lissenden Gardens
Questions we are asked in Lissenden Gardens
Is Regis Road Business Park, near Lissenden Gardens, within your area?
Yes, sites like Regis Road Business Park are within our area, along with the rest of Lissenden Gardens. To start, just give us a call on 01277 525 020 or email the details over with the unit, the joints involved and your access times.
Can you quote for a block close to Gospel Oak station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Photos of each elevation help us quote accurately.
How long does a job like this take?
The duration is planned around your programme and the access we are given. We’ll give you an estimate of time on site when we quote.
When is resealing likely to be due?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.
Who decides which product is used?
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.
How do you handle work on occupied blocks?
Residents and tenants carry on as normal. We flag any areas that need internal access well before the dates so it can be arranged.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure, and sign any area that should be left alone.
Honest limits
Part of a good diagnosis is knowing where sealant stops. You’ll hear from us if the cause turns out to be one of these:
- Broken glass or failed sealed units
- Materials that need asbestos testing before work
- Failed window or door frames, which need a window contractor
If in doubt, call the office on 01277 525 020 or email us and we’ll say what we think before you book.
Where we work in Lissenden Gardens
- Communal entrances and stairwells
- Balcony and threshold joints
- External wall and movement joints
- Shopfronts below residential blocks
- Window and door perimeters on blocks
- Communal kitchens and washrooms
Blocks and managed buildings in Lissenden Gardens
For a London block, the agent or landlord usually handles notices to residents and access to flats. We fit the programme to your notice periods. Six care or nursing homes sit less than 2 miles from Lissenden Gardens. Frame mastic on care buildings is best renewed elevation by elevation, with the manager deciding timings.
If your remit includes a building such as Parliament Hill School, frame and door mastic can be programmed for the holidays. If you are responsible for a building such as Highgate Road Chapel, frame and door mastic needs the same attention as any other property.
Lissenden Gardens is about 1 mile east of Hampstead, in Greater London. We cover Lissenden Gardens and the rest of Greater London, with the same fixed quotes and 12-month guarantee as everywhere else. Lissenden Gardens is one of 764 places we cover in Greater London for mastic joints.
Work on mastic joints is covered throughout NW5, NW3 and N19. For a building on Rona Road, Dale Road and Fleet Road or nearby, send details and we’ll quote for mastic joints. We also cover Gospel Oak (1 mile south), Dartmouth Park (1 mile north-east), Tufnell Park (1 mile east), Kentish Town (1 mile south) and Chalk Farm (1 mile south). Further afield, our area takes in London (5 miles south-east), City of Westminster (3 miles south), Marylebone (3 miles south), Kensington (5 miles south-west), St Pancras (3 miles south-east) and Shoreditch (4 miles south-east).
Around Lissenden Gardens
Around Lissenden Gardens, our work takes us to commercial buildings near Parliament Hill, The Royal School and Gospel Oak Primary School and the streets around them. Also close by are The Bull and Last pub (under half a mile north-east) and Cecil Sharp House (1.3 miles south). Lissenden Gardens has its own railway station: Gospel Oak station. Well-known places in the area include Royal Northern Hospital (1.2 miles east) and Montfichet's Tower (3.7 miles south-east). Green spaces nearby include Parliament Hill and The Long Water.
Our process
We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you. Most London premises stay occupied while we’re on site, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.
- We inspect the joints, building by building, and record what has failed and why.
- You get a fixed quote, priced per building where that helps your budgeting.
- The sequence and the dates are fixed with you, giving you what you need to notify occupiers.
- Failed mastic is removed and the faces taken back to sound, dry material.
- Deep joints get backing rod, faces are primed if the manufacturer specifies it, then the joint is sealed and tooled.
- Finished joints are looked over and the 12-month guarantee confirmed.
Preparing the site
- Explain the parking and delivery arrangements
- Tell us what induction or permit system the site runs
- Send your site hours and access windows
Quotes
For a fixed quote, speak to us on 01277 525 020 or email us with the site address and an outline of the work. Our quote form is another easy route.
Related advice
Do you need mastic sealing in Lissenden Gardens?
Frames, panels and masonry expand and contract through the year, and the sealant takes up that movement. If the joint or the product wasn’t suited to the movement, it splits and fails early.
If one of these sounds familiar, it’s time for a closer look:
- Water getting in round frames after rain
- Draughts at frames across a block
- Repeated reactive repairs to the same buildings
- Window mastic that has split and shrunk
Buildings close to stations like Gospel Oak station, less than half a mile to the south-west of Lissenden Gardens, are often flats over shops, with frame mastic to keep sound.
What your quote should include
- What site paperwork they can supply
- Can the work be phased to keep areas open?
- Health and safety accreditation such as CHAS
- Who will actually carry out the work
Different surfaces, different methods
Tenement and older buildings
Natural stone can be marked by the wrong sealant, so we pick a grade that won’t mark it.
Commercial and mixed-use buildings
Tenants in commercial buildings need to keep trading, so we plan around them.