Mastic sealant contractors in Eltham
Looking for mastic sealing in Eltham? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- A mix of products and colours from past repairs
- Damp patches beside frames
- Communal area joints that look neglected
Mastic sealing for businesses in Eltham
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Different surfaces, different methods
External movement joints
The joint width has to suit the movement and the sealant’s capability, often around 2:1 width to depth, as the manufacturer advises.
Estate-wide resealing programmes
Housing associations and agents often manage many similar blocks. We quote building by building and work through them in turn.
About our mastic sealing in Eltham
Across Eltham and the rest of Greater London, we work the same way: send details, get a fixed quote, we seal, and the work is guaranteed. A list of buildings, a few photographs and approximate joint numbers are enough for a quick quote or we can visit. If you are dealing with no planned programme for sealant and water getting in round frames after rain, we can put it right, on shopfronts below residential blocks, communal kitchens and washrooms and communal entrances and stairwells alike. Whoever orders the work in Eltham, the brief is normally the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
Across Greater London, Eltham included, the ULEZ applies, and parking and loading rules differ from street to street. For a block or estate, it helps to know where we can park and stage materials.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Where
- Eltham (SE9, SE12, DA15, BR7)
- Wider area
- Greater London
- Cover
- 12 months on every job
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Page updated
- 3 November 2026
Doing it in-house
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Building owners, agents and FMs in Eltham
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. The work is planned around how the building runs, so guests, pupils, patients or staff are disturbed as little as possible.
Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.
Aftercare for building managers
Your facilities or cleaning team can help the joints last. Share these points with them:
- Keep bins and bikes away from communal door frames
- Mention RAMS, insurance or CSCS requirements up front
- Encourage occupiers to report problems at frames
- Include mastic in your cyclical inspections
Include sealant in planned building inspections. Check for splits, open joints, brittle mastic and lifting edges, and note the building and elevation.
Left open, joint edges in render, brick or frames can deteriorate. Then the edges may need repairing first.
Towns and villages near Eltham
Other services in Eltham
Diagnose, treat, sign off
Inspect, seal, sign off: every visit follows that pattern. First comes an inspection and agreement on scope, then the work is carried out to the specified product and detail, and the job ends with a walk round and sign-off. In Eltham, 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.
- First we look at the mastic on each building and note what needs replacing.
- We send a fixed quote that sets out the joints, the products and the programme.
- The programme is fixed with you, including dates you can pass on to residents or tenants.
- 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.
- Completed joints are inspected and carry a 12-month workmanship guarantee.
Preparing the site
- Have the specification and drawings to hand
- Share your working hours and any access restrictions
- Tell us what induction or permit system the site runs
Get a fixed quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price against exactly what is specified. For smaller jobs, photographs and a description will do.
Read more
Looking after buildings in and around Eltham
London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We fit the programme to your notice periods. The 2 miles around Eltham include nine care or nursing homes. For owners and operators of care buildings, window perimeters and external joints are best renewed in planned phases around residents.
Older community buildings, Church of Holy Trinity among them, often have frames of mixed ages whose mastic varies. If you own or manage units on a site such as Green Lane Business Park, 0.7 miles south-east of Eltham, failed mastic on frames, door surrounds and external joints can be dealt with unit by unit. If your remit includes a building such as St Thomas More Catholic Comprehensive School, frame and door mastic can be programmed for the holidays.
Eltham is about 7 miles west of Dartford, in Greater London. Looking for mastic sealing in Eltham? We can help. Eltham is one of 764 places in Greater London on our list for mastic joints. We also cover London, some 8 miles away.
Commercial sites across SE9, SE12, DA15 and BR7 are covered. We cover commercial and managed buildings on Eltham High Street, Tarnwood Park and Elmslie Court. With the A20 and B263 nearby, Eltham is easy to get to with materials and equipment. Just outside Eltham, we also work in Middle Park (1 mile west), New Eltham (1 mile south-east), Well Hall (1 mile north), Coldharbour (1 mile south) and Avery Hill (1 mile north-east). Nearby towns on our patch include London (8 miles north-west), City of Westminster (10 miles north-west), Marylebone (10 miles north-west), Kensington (12 miles west), St Pancras (9 miles north-west) and Shoreditch (8 miles north-west).
What’s near Eltham
We work on buildings around Horn Park, Eltham Church of England Primary School and The Greyhound Public House. There’s a railway station in Eltham itself: Mottingham station. Other landmarks nearby include Eltham Community Hospital (under half a mile north) and Metropolitan Police Museum (2.1 miles east). For a walk, there’s The Tarn and Summer Hill.
Why deal with it now?
Looking at mastic during planned maintenance costs little. Leaving it until there’s a leak turns it into reactive work and less choice about when. In Eltham, each extra visit means more notices, permits and disruption, so cutting the old sealant out fully and doing it right once is the better route.
Larger quantities, tricky access or phasing all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Why appoint us
- Standard and matched colours in many product ranges
- Matching to RAL references, product permitting
- Sealing commercial buildings since 2005
- Our applicators hold CSCS cards
Read what affects the cost or our accreditations and insurance.
Common questions from Eltham clients
Do you cover business parks and estates near Eltham, such as Green Lane Business Park?
Yes. We cover Eltham and the area around it, including industrial estates, business parks and retail parks such as Green Lane Business Park. A few photos and the unit address let us price the work.
Can you work in a London building with booked loading and goods-lift slots?
Yes. Inductions, permits and timed loading are routine for us in London. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. We allow for the ULEZ, which covers every borough
Do you guarantee the mastic work?
A 12-month guarantee covers our work. It covers our workmanship, not later building movement, damage or frame failures.
Do you work to architects’ specifications?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and we raise anything unclear before work begins.
How long do sealant joints last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Sealant joints are maintenance items, so inspect them regularly.
Does the weather affect the work?
For external joints, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.
Will you quote for a small job?
We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.