Mastic sealing for building owners and managing agents in New Eltham, Greater London
Mastic sealing for building owners, managing agents and housing associations in New Eltham. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- A mix of products and colours from past repairs
- Damaged joints in communal entrances and corridors
- Movement joints with sealant missing
Mastic sealing for New Eltham sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Diagnose, treat, sign off
We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. In New Eltham, 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.
- We check the asbestos register for older buildings and look at the joints.
- 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.
Before we start on site
- Tell us what induction or permit system the site runs
- Agree which areas must stay open
- Have the specification and drawings to hand
Get a fixed quote
To get 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.
Related advice
Mastic sealing for commercial buildings in New Eltham
Across New 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, and site visits can be arranged. We work on communal kitchens and washrooms, external wall and movement joints and window and door perimeters on blocks, and the usual reasons a site gets in touch are a mix of products and colours from past repairs and draught complaints from residents or tenants. Looking for mastic applicators who cover New Eltham? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
Across Greater London, New 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 stand by our work: 12 months, guaranteed. It covers how we prepared and applied the sealant.
- Location
- New Eltham (SE9, DA15, BR7)
- Wider area
- Greater London
- Guarantee
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Looking after buildings in and around New Eltham
There are 14 care or nursing homes within about 2 miles of New Eltham. Owners of care premises can bring window and door mastic into a phased programme planned around the home. London blocks come with residents to inform, access to agree and often a concierge or estate office to work with. We plan around the notices and access you arrange.
For agents with blocks near New Eltham station, less than half a mile to the north-east of New Eltham, a block-wide mastic programme deals with frames, balconies and entrances in one go. Student accommodation around universities such as University of Greenwich - Avery Hill, 0.7 miles north-east of New Eltham, is usually managed block by block, which suits a planned mastic programme.
New Eltham is about 1 mile south-east of Eltham, in Greater London. New Eltham sits inside our coverage and the rest of Greater London, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. New Eltham is one of 764 places in Greater London on our list. London is covered too, some 8 miles away.
We cover the SE9, DA15 and BR7 postcode districts. Among the streets we cover are Green Lane, Gerda Road and Novar Road. We also cover Eltham (1 mile north-west), Longlands (1 mile south-east), Coldharbour (1 mile south-west), Avery Hill (1 mile north) and Blackfen (1 mile north-east). A short drive away, we cover London (8 miles north-west), City of Westminster (11 miles north-west), Marylebone (11 miles north-west), Kensington (13 miles west), St Pancras (10 miles north-west) and Shoreditch (9 miles north-west).
Local landmarks in New Eltham
Around New Eltham, our work takes us to commercial buildings near Elmstead Wood and St Thomas More Catholic Comprehensive School. There’s a railway station in New Eltham itself: New Eltham station. Nearby you’ll also find Metropolitan Police Museum (1.4 miles east) and Eltham Community Hospital (1.1 miles north-west). Not far away are Summer Hill and The Tarn.
Doing it in-house
Paperwork matters too. Many sites expect CSCS cards, RAMS and proof of insurance, and we will confirm the paperwork you need with the quote.
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.
Different surfaces, different methods
Commercial and mixed-use buildings
Where retail and residential share a building, so phasing has to suit both. Tell us your site hours and access windows and we’ll plan around them.
External movement joints
Movement joints are cleaned out, backed with rod and resealed with a sealant of the right movement class.
Also near New Eltham
What else we do in New Eltham
Common questions from New Eltham clients
Will you take on a block within reach of New Eltham station?
Yes, and several blocks can go on one quote. Photos of each elevation help us quote accurately.
Do you work in London buildings with loading restrictions?
Yes, we plan every London job around the building’s own access rules. The building manager’s rules go straight into our method. We allow for the ULEZ, which covers every borough
When can the area be used after sealing?
We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
Which sealant will you use?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
Is asbestos a concern with old mastic?
Some mastics in pre-2000 buildings contain asbestos. We ask for the asbestos register or survey before work starts and suspect material is tested first.
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.
Do you work to architects’ specifications?
Yes. Send it with your enquiry, and we’ll price the work to it, flagging anything that needs clarifying.
Why deal with it now?
Mixed repairs by different contractors leave a patchwork of products and colours. A block-wide reseal gives one product, one colour and one guarantee. Repeat call-outs disrupt occupied London buildings, so cutting the old sealant out fully and doing it right once is the better route.
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.
Why clients in New Eltham choose us
- 12-month guarantee on workmanship
- Standard and matched colours in many product ranges
- Public liability insurance in place
- Products installed to the manufacturer’s instructions
Read what affects the cost or our accreditations and insurance.
Commercial clients in New Eltham
Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
When to call us in New Eltham
Frames, panels and masonry expand and contract through the year, and every joint has to stretch and squeeze with them. If the joint or the product wasn’t suited to the movement, it splits and fails early.
Look out for the following:
- Mastic failing across several blocks on an estate
- Complaints coming in block by block
- Damaged joints in communal entrances and corridors
- Failed external movement joints
If your remit includes a building such as Wyborne Primary School, frame and door mastic can be programmed for the holidays.
What your quote should include
- Is the sealant right for the movement and the substrate?
- What the guarantee covers, and for how long
- How the joint faces will be prepared and primed
- How the existing material will be dealt with