Mastic sealant contractors in North Cray
Need mastic sealing in North Cray? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Damp patches beside frames
- Repeated reactive repairs to the same buildings
- Occupiers reporting cold air round windows
Need mastic sealing in North Cray?
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Why deal with it now?
Open external joints let water into walls and around frames. Damp patches, stained plaster and decorating claims can follow, which is harder to deal with than resealing. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Every site prices differently: joint size, product, access and site hours all play a part. A fixed quote follows once we understand the job.
Why clients in North Cray choose us
- Work carried out by CSCS-carded applicators
- 12-month guarantee on workmanship
- Over 20 years of commercial sealing
- CHAS accredited contractor
Read what affects the cost and how we’re accredited.
Mastic sealing for commercial buildings in North Cray
For blocks and buildings in North Cray and across Greater London, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photographs of typical joints and a rough idea of quantities let us give a quick quote, and site visits can be arranged. We work on external wall and movement joints, communal kitchens and washrooms and communal entrances and stairwells, and the usual reasons a site gets in touch are cracked, hardened mastic round windows on a block and draughts at frames across a block. Most enquiries from North Cray start with one failed joint and grow into a wider look at the building: we check the joints around it and give you an honest view of what needs doing now and what can wait.
London has a large stock of purpose-built blocks, mansion flats and converted buildings managed by agents and housing associations. Mastic around windows, doors and balconies tends to fail across a whole block at a similar time, which is why block-wide programmes make sense.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Location
- North Cray (DA14)
- Region
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
Your questions answered
Do you work for managing agents with blocks near Albany Park station?
Yes. Managing agents, landlords, property factors and housing associations are who this service is for. Give us the building’s details and say how residents are notified, and we’ll quote and plan to suit.
Do you work in occupied care homes around North Cray?
Yes, with the manager deciding the order and timing of rooms. Tell us about any infection-control or safeguarding requirements and we will work to them.
Can you plan resealing across several buildings?
We can. Each building is inspected, quoted and scheduled in turn starting wherever is most urgent.
How soon can the area be used again?
Curing time varies by product, and we confirm it on the day.
Does weather matter for sealant work?
For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.
What guarantee do you give on resealing?
A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.
Who decides which product is used?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
Looking after buildings in and around North Cray
There are seven care or nursing homes within about 2 miles of North Cray. Owners of care premises can bring window and door mastic into a phased programme planned around the home. For a London block, the agent or landlord usually handles notices to residents and access to flats. We work to your notice and access plan.
Landlords with units on estates such as Old Bexley Business Park, 0.9 miles to the north-east of North Cray, can bring frame, door and external mastic across several units into one programme. Churches, halls and community buildings such as Parish Church of St James are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time.
North Cray is about 2 miles east of Sidcup, in Greater London. Any commercial site in North Cray is covered. North Cray is one of 764 places we cover in Greater London. London is covered too, around 11 miles from North Cray.
We take on mastic joints across the DA14 postcode area. Streets here include Water Lane, North Cray Road and Leafield Lane, and sites on any of them can send details for a fixed quote. If your building is just outside North Cray, we cover Bexley (1 mile north), Coldblow (1 mile north-east), Ruxley (1 mile south), Blendon (1 mile north-west) and Joyden's Wood (1 mile east). Nearby towns on our patch include London (11 miles north-west), City of Westminster (14 miles north-west), Marylebone (14 miles north-west), Kensington (15 miles west), St Pancras (13 miles north-west) and Shoreditch (11 miles north-west).
Landmarks near North Cray
In North Cray, that means premises near Foots Cray Meadows, Cleeve Park School and The White Cross pub, among other places. The closest station to North Cray is Albany Park station, roughly 0.6 miles north-west. Nearby you’ll also find Broadway Shopping Centre (1.7 miles north) and Bexley Hospital (1.8 miles north). Open spaces near North Cray include Wansunt Pit and Summer Hill.
Diagnose, treat, sign off
On arrival, 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, and the work typically takes anything from a day to a few weeks, depending on the number of buildings and joints. In North Cray, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Areas are handed back as each section is finished.
- We inspect each building and record the joints that have failed.
- The quote is fixed and split as suits you.
- We agree the programme and dates with you.
- Failed sealant is removed and the faces prepared.
- Joints are resealed and tooled.
- Each building is checked and signed off with the 12-month guarantee.
Getting the site ready
- Arrange parking or a loading space
- Point out any areas we must not close
- Warn occupants and staff about the work
Ask for a quote
Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To ask for one, call 01277 525 020 or use the quote form.
Read more
When it isn’t the sealant
Some faults sit outside our scope, and we point that out rather than sealing over them:
- Materials that need asbestos testing before work
- Frames that are rotten, warped or broken
- Glazing that needs replacing
If in doubt, speak to us on 01277 525 020 or email a schedule or drawings and we will say what we think.
What we seal
- Window and door perimeters on blocks
- Balcony and threshold joints
- Communal entrances and stairwells
- External wall and movement joints
- Shopfronts below residential blocks
- Communal kitchens and washrooms
Cost factors for mastic joints
Before we quote, we look at:
- Whether old sealant has to be cut out first
- Joint width, depth and condition
- How much there is to seal
- Which sealant the job calls for
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Before you send an enquiry
For an accurate fixed quote, we need a clear picture of the site. Useful things to include:
- Approximate linear metres or a joint schedule
- Photos of the joints, close up and from further back
- Whether the building will be occupied during the work
- Specification clauses that apply
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. For a chat about it beforehand, ring 01277 525 020 or email us.
What we are called out for in North Cray
We often find joints filled solid with no backing rod so the mastic is bonded on three sides. That three-sided adhesion stops it stretching and splits as the building moves.
It’s worth sending us details if you spot any of the following:
- Patchy repairs in mismatched sealant
- Complaints coming in block by block
- Cracked, hardened mastic round windows on a block
- Communal area joints that look neglected
Site managers at schools like Royal Park Primary Academy can fit frame mastic into the summer works.
Questions to ask before you book
- What site paperwork they can supply
- Whether their applicators hold CSCS cards
- Whether old or failed sealant will be cut out, not overlaid
- How long is the guarantee, and what does it include?
Aftercare for building managers
Your facilities or cleaning team can help the joints last. Pass these on to them:
- Share the asbestos register when you send details
- Protect low-level joints in entrances
- Share your contractor requirements early
- Log resealing dates block by block
Our workmanship is covered for 12 months, so report any failure in that time. After that, regular inspection keeps the programme on track.
Failed mastic often goes unnoticed until heavy rain finds it. Resealing when cracking first shows avoids water damage and saves internal repairs.