The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Expansion Joint Sealing in New Addington

We carry out expansion and movement joint sealing in walls, decks and floors in New Addington. Send details for a fixed quote.

  • Joints where the bead has lost adhesion
  • Layers of sealant in a movement joint
  • Torn sealant in brick or block movement joints
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Expansion joint sealing for New Addington sites

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Owners, agents and contractors

If you look after buildings for someone else, clear figures and clear communication matter. You get a fixed quote, an agreed scope and a walk round at the end.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Sites in New Addington can sit alongside others in a wider programme.

Expansion joint sealing in New Addington

We have been sealing expansion and movement joints for over 20 years. CHAS accredited, Constructionline member, CSCS-carded applicators and five million pounds of public liability insurance. Workmanship is backed by our 12-month guarantee. We work on precast concrete panel joints, cladding panel joints and brickwork movement joints, and the failures we’re asked to look at most are rain penetration at brick or block movement joints and torn sealant in brick or block movement joints. Facilities teams, main contractors and managing agents in New Addington tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Distribution and trade units on London’s edges, and deck car parks across the city, hold most of its floor and slab joints. Planning a job in New Addington means thinking about access, loading times and the ULEZ as well as the joints.

We sign every job off with a 12-month guarantee. It’s a plain promise: if our work fails within that year, we put it right.

Location
New Addington (CR0, CR9)
Region
Greater London
Cover
12 months on our workmanship
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Traffic, movement and joints around New Addington

London car parks, loading bays and podium decks often can’t close for long, so the work is broken into short sections agreed with the building manager. The 3 miles around New Addington take in at least three named trading estates, business parks or retail parks. Sites like these are full of saw-cut floor joints, yard slabs and car park joints.

Schools like Rowdown Primary School often have long brick elevations with movement joints that age quietly. Access in New Addington needs thought: the ULEZ covers all of Greater London, and loading and parking are rarely simple.

New Addington is about 4 miles south-east of Croydon, in Greater London. If you’re looking for expansion joint sealing in New Addington, we can help, as we do across Greater London. Our Greater London coverage takes in 764 places. There’s a separate page for London, about 11 miles away.

Business premises anywhere in CR0 and CR9 are within our area for movement joints. Among the streets we cover are Bothwell Road, Windham Avenue and Gascoigne Road. Close to New Addington, our area also takes in Forestdale (1 mile west), Fickleshole (1 mile south), Addington (1 mile north-west), Farleigh (1 mile south-west) and Selsdon (2 miles west). Bigger towns within reach include London (11 miles north), City of Westminster (13 miles north-west), Marylebone (13 miles north-west), Kensington (14 miles north-west), St Pancras (13 miles north) and Shoreditch (13 miles north).

Local landmarks in New Addington

Around New Addington, our work takes us to commercial buildings near Meridian High School and Addington Vale. The closest station to New Addington is Hayes (Kent) station, roughly 2.6 miles north-east. Well-known places in the area include Warlingham Park Hospital (1.8 miles south) and Bethlem Museum of the Mind (3.3 miles north-east). The countryside around New Addington includes Nore Hill and Hutchinson's Bank.

Map of New Addington © OpenStreetMap contributors

Common questions from New Addington clients

Can you work at a site such as Vulcan Way Industrial Estate, by New Addington?

Yes, sites like Vulcan Way Industrial Estate are within our area, along with the rest of New Addington. A few photos and the unit address let us price the work.

Do you take on work at healthcare sites like Bethlem Royal Hospital?

Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.

Why do our movement joints keep failing?

Adhesion failure, cohesive failure, edge breakdown and UV ageing account for most cases. Working out the cause comes first, because the fix differs.

What about RAMS and site documents?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm them with the quote.

What happens if it rains on the day?

The joint has to be dry, and the air and surface temperature inside the product’s limits. Frost, rain and condensation on steel or concrete can hold up external work so external dates keep some flexibility.

Is movement joint sealing guaranteed?

Our workmanship on movement joints carries a 12-month guarantee. The guarantee covers how we sealed, not damage caused afterwards.

Is it fine to apply new sealant on top of old?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

How the job changes by surface

Concrete and precast panel joints

Precast and concrete panel joints move daily. We use a sealant classed for the movement, laid over backing to depth.

Cladding panel joints

Access to cladding joints is agreed before the price is fixed. Photos taken near the joints help us price accurately or a site visit fills the gaps.

Looking after the joints

Regular inspection catches problems early. In particular:

  • Clear dirt from joint lines during routine cleaning
  • Record the sealant used and the date in the O&M file
  • Report split or peeling joint sealant early
  • Keep scrapers and ploughs from dragging across joint sealant

Fresh joint sealant needs its full cure time before it takes traffic or water. How long that takes depends on the product, the temperature and the depth of the joint. Keeping the area coned off until then avoids tyre marks and damage.

Joints sealed at the same time generally fail around the same time. It pays to check every joint, not just the obvious one so you can prioritise and budget. We’ll tell you which movement joints need doing now and which can wait.

Should maintenance staff do it?

What you see is the finished bead, but most of the work is hidden. Backing rod, primer where specified and a joint designed to move with the building are where general trades tend to cut corners.

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.

From enquiry to sign-off

In a busy building, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then handed back before we move to the next. All of Greater London is in the ULEZ, and kerbside space in New Addington can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.

  1. We start with photos, approximate lengths and any drawings, visiting where needed.
  2. We compare each joint’s width with the movement and the sealant’s capability.
  3. Old sealant and debris are cut out of every joint.
  4. Edges are checked, and we tell you if any need repairing before sealing.
  5. A sealant suited to the movement and traffic is laid to depth and tooled.
  6. Each area is handed back after its cure time, under our 12-month guarantee.

Getting the site ready

  • Warn occupants and staff about the work
  • Flag any permit to work we’ll need
  • Send any specification or drawings in advance

Quotes

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Get a quick quote

Advice

What we are called out for in New Addington

When the movement exceeds the sealant’s capability, the bead tears. A joint that’s too narrow for the movement, or a product with the wrong movement class, will split through the middle. The same product in the same joint tends to fail again, so we check width and movement before quoting.

Things that normally lead to an enquiry:

  • Rain penetration at brick or block movement joints
  • Brittle, chalky sealant on external joints
  • Sealant peeling off one face of the joint
  • Expansion joints split through the centre of the bead

Across sites such as Glebe Farm Business Park, 2.2 miles east of New Addington, floor and movement joints can be sealed in phases so units keep working.

What your quote should include

  • Will CSCS-carded applicators be on site?
  • Can the work be phased to keep areas open?
  • Will RAMS and insurance details be available?
  • Will failed sealant be removed rather than covered?

How to choose a sealant contractor

Accreditations

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