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

Facade Sealing in Kew

Facade sealing in Kew, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.

  • Old perimeter mastic that has dried out
  • Leaks at window and door perimeters
  • Gaps between rainscreen or cladding panels
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Need facade sealing in Kew?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

How we handle facade sealing in Kew

Every facade quote starts with how the joints will be reached. Let us know what access exists or is planned, and any site rules we need to work around, so the price covers the real job. We work on perimeter joints where frames meet the structure, shopfront frames and cladding panel joints, and the usual reasons a site gets in touch are perimeter sealant that has split or peeled away and water coming in around window frames. A single leaking joint is often how a building in Kew first comes to us: we look at the rest while we are there and tell you what we find.

Around Kew, as across London, much of the work is refurbishing existing buildings as well as building new ones. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building, so tidy, well-planned work matters.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we’re clear about what is covered before work starts.

Place
Kew (W4, TW9, TW8)
Wider area
Greater London
Cover
A 12-month guarantee
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

How the quote is worked out

These are the things that shape the price:

  • Phasing around occupants
  • Removal of failed or old sealant
  • How much there is to seal
  • Specialist products, such as fire-rated or hygienic sealants

The price depends on the quantity of joints, what has to come out first and how the joints are reached. Call for a quote once you have the details.

What to include in your enquiry

For an accurate fixed quote, we need to understand the site. Send us:

  • Any dates the work must fit around
  • Access details, including height
  • What the building is and how it’s used
  • Specification clauses that apply

A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

Contractors’ notes for Kew

As part of Greater London, Kew is inside the ULEZ, which applies to every van on site. Delivery slots and scarce storage shape how and when the mastic goes in. Kew has a good number of hotels close by, all within 2 miles. Hotel extensions and refits normally have to fit around bookings, so mastic dates are tight.

Work at a hotel such as Clayton Hotel Chiswick, 0.6 miles north of Kew, tends to be programmed around bookings, mastic included. When a college such as Ealing and West London College, 2.2 miles north-west of Kew, builds or refurbishes, the mastic package normally has to fit around students and staff. When units on a site such as Kew Retail Park (under half a mile south of Kew) are refurbished or reclad, the panel joints and window perimeters are part of the mastic package.

Kew is about 2 miles south of Acton, in Greater London. Businesses, contractors and managing agents in Kew use us for work on facade joints. We work across 764 places in Greater London, large and small. Our London page has more on work in that area.

We cover the W4, TW9 and TW8 postcode districts for facade joints. We cover commercial and managed buildings on Kew Road, Maze Road and Kent Road and the roads nearby. Being close to the A3000, Kew is easy to get to with materials and equipment. If your building is just outside Kew, we cover Strand-on-the-Green (1 mile north), Grove Park (1 mile east), North Sheen (1 mile south), Gunnersbury (1 mile north) and Turnham Green (1 mile east). A short drive away, we cover London (8 miles east), City of Westminster (6 miles east), Marylebone (6 miles north-east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).

What’s near Kew

Around Kew, our work takes us to commercial buildings near Library for Iranian Studies, Kew Green and Chiswick School. Also close by are Kew College Prep (less than half a mile south-west) and Bull's Head pub (less than half a mile north). For rail, the closest station is Chiswick station, roughly 0.5 miles south-east. Other landmarks nearby include Livat Hammersmith (2.2 miles east) and Barnes Hospital (1.5 miles south-east). For a walk, there’s Kew Gardens Lake and Duke's Hollow.

Map of Kew © OpenStreetMap contributors

Why act early in Kew

Patch repairs over old sealant tend to come back. A full cut-out and reseal costs more on the day but lasts much longer and avoids repeat call-outs. In a London building, a failed joint rarely affects only one party. Putting it right early is less disruptive than dealing with the consequences.

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.

Why appoint us

  • Specification-led, product-correct work
  • Colours confirmed for the specified product
  • One contact handling all your sites
  • A range of standard colours, depending on the product

Take a look at what affects the cost and our accreditations.

General trades versus a specialist

Some joints are best left to specialists: 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.

Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

On site: what to expect

At the end of each section, the masking comes off, the area is cleaned and every joint is checked with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.

  1. We start with photographs, drawings or a visit to see the joints and agree access.
  2. Product choice follows the joint’s movement and substrate.
  3. The existing bead comes out in full and both faces cleaned back.
  4. Primer is applied where the maker specifies it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. We go over the completed work with you before leaving.

Preparing the site

  • Let building users know which areas are affected
  • Share your working hours and any access restrictions
  • Send any specification or drawings in advance

Get a fixed quote

For a fixed quote, phone 01277 525 020 or email a schedule or drawings. Our quote form is another easy route.

Get a quick quote

Advice

Questions about Kew

Can you work in a London building with booked loading and goods-lift slots?

Yes, we plan every London job around the building’s own access rules. 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

Can you take on a job at a hospital such as Clayponds Hospital?

Yes, hospitals are one of the sectors we cover. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Which sealant will you use?

A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.

How long do sealant joints last?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

Does weather matter for sealant work?

Outside, 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.

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Is it okay to overlay old mastic?

No. A bead run over old sealant soon lifts. We remove the failed sealant, clean the faces, set the depth and reseal.

Commercial clients in Kew

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Kew can form part of a wider programme across Greater London.

Different surfaces, different methods

Brick and stone facades

On masonry, the sealant has to suit a porous, textured surface. Neutral-cure products are used because acetoxy types can mark some stone, with primer where its maker specifies.

Coping and flashing joints

Where the specification calls for sealant at copings or flashings, we can seal them. They sit in the most exposed positions on the building, so preparation and product choice matter.

Accreditations

Trusted. Accredited. Insured.