Strand-on-the-Green mastic sealing
Mastic sealing for building owners, managing agents and housing associations across Strand-on-the-Green, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Brittle perimeter mastic across a building
- Leaks at window and door perimeters
- Communal area joints that look neglected
Need mastic sealing in Strand-on-the-Green?
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Your questions answered
We manage a building near Chiswick station. Can you help?
Yes, we work for agents, landlords and housing associations with blocks of every size. We work to your notice and access arrangements.
Can you work at a site such as Kew Retail Park, by Strand-on-the-Green?
Yes. Estates, retail parks and business parks around Strand-on-the-Green, Kew Retail Park among them, are all within reach. A few photographs and the unit address let us price the work.
Do you guarantee the mastic work?
Every building we reseal has a 12-month guarantee. It applies to our workmanship rather than damage or problems with the frames.
Can you follow the specification on our project?
Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.
Can you reseal a whole block or estate?
Yes. We survey and price each building, then work through them in order starting wherever is most urgent.
How soon can the area be used again?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
Mastic sealing in Strand-on-the-Green
Blocks are lived in, so access and disruption have to be thought through. The sequence, the areas and the dates are settled with you, giving you what you need to notify residents. Entrances and stairwells are kept in use while we work. We work on communal entrances and stairwells, window and door perimeters on blocks and shopfronts below residential blocks, and what we’re called in for most is complaints coming in block by block and cracked, hardened mastic round windows on a block. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Strand-on-the-Green, that means joint design, primers and backing rod as standard.
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.
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.
- Where
- Strand-on-the-Green (W4, TW9, TW8)
- Region
- Greater London
- Cover
- 12 months on every job
- Quote
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
Common problems we fix in Strand-on-the-Green
We often find joints filled solid with no backing rod, so the mastic is glued to the joint bottom too. It can’t stretch properly and it tears.
Typical triggers for a call:
- Old repairs sealed over failed mastic
- No planned programme for sealant
- Estate-wide sealant that is simply worn out
- Movement joints with sealant missing
Schools and community buildings such as Strand-on-the-Green Infant and Nursery School need frame and external mastic kept sound like any building.
Questions to ask before you book
- Who will actually carry out the work
- How the existing material will be dealt with
- The named product and why it was chosen
- The terms of the workmanship guarantee
How the job changes by surface
Window and door perimeters on blocks
Perimeter joints on blocks are best done elevation by elevation or block by block. Access is agreed with you before the quote is fixed.
Commercial and mixed-use buildings
Landlords with commercial portfolios have shopfronts, office entrances and external joints to look after. A planned programme suits multi-building portfolios.
Places near Strand-on-the-Green
Other services in Strand-on-the-Green
On site: what to expect
Before we leave any area, the masking comes off, the area is cleaned and every joint is checked. If an area should be left alone while the sealant cures, we say how long and put signs out. The ULEZ covers the whole of Greater London, and parking near a job is rarely simple. Let us know about any on-site parking or loading arrangements when you send the job details.
- First comes a look at the joints and, for older buildings, the asbestos records.
- The products and programme are set out in a fixed quote.
- Failed mastic is removed completely.
- The joints are prepared and resealed with the right product.
- We finish each building before moving to the next.
Before we start on site
- Share the asbestos register for older buildings
- Point out any areas we must not close
- Let building users know which areas are affected
Request a quote
Let us know the site, the scope and your timescale, and we’ll put a fixed quote together. To get it moving, ring 01277 525 020 or send photos by email.
Read more
Aftercare for building managers
To get the most from the new sealant:
- Keep bins and bikes away from communal door frames
- Log resealing dates block by block
- Prioritise elevations facing the weather
- Include mastic in your cyclical inspections
Our workmanship is covered for 12 months, so report any failure in that time. Beyond that, routine checks spot the next round of repairs.
Planned resealing is easier to budget than emergency repairs. A programme can start with the worst buildings so spending is spread.
Building owners, agents and FMs in Strand-on-the-Green
Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.
We work for building owners and managing agents on everything from one building to a spread of sites. Several sites can go on one quote, so there’s one set of paperwork to deal with.
What sets the cost
Quotes vary with the job. Expect it to depend on:
- Backing rod, priming and other preparation
- Whether the work must be split into stages
- Site requirements such as inductions and permits
- Specialist products, such as fire-rated or hygienic sealants
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.
Before you send an enquiry
A few photos plus some basic facts will normally do. Please tell us:
- The postcode of the building
- Photos of the joints, close up and from further back
- Rough lengths or quantities, or drawings if you have them
- Access details, including height
Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.
Mastic sealing around Strand-on-the-Green: how the place shapes the job
In London, mastic work on a block goes through the managing agent or landlord, with notice to residents. We fit the programme to your notice periods.
Landlords with units on estates such as Kew Retail Park (0.5 miles south of Strand-on-the-Green) can bring frame, door and external mastic across several units into one programme. Older community buildings, St Paul's Church among them, often have frames of mixed ages whose mastic varies.
Strand-on-the-Green is about 2 miles south of Acton, in Greater London. Businesses, contractors and managing agents in Strand-on-the-Green use us for work on mastic joints. Strand-on-the-Green is one of 764 places we cover in Greater London for mastic joints. We also cover London, some 8 miles away.
We take on mastic joints across the W4, TW9 and TW8 postcode area, whatever the building. Streets here include Kew Road, Maze Road and Kent Road. Access to Strand-on-the-Green is via the A3000. Sites close to Strand-on-the-Green are covered too, including Kew (1 mile south), Grove Park (1 mile east), Gunnersbury (1 mile north), North Sheen (1 mile south) 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 east), Kensington (3 miles east), St Pancras (7 miles north-east) and Shoreditch (9 miles east).
Local landmarks in Strand-on-the-Green
In Strand-on-the-Green, that means premises near Chiswick School, Kew Green and Bull's Head pub. Other local landmarks include Library for Iranian Studies (1.6 miles north) and Kew College Prep (less than half a mile south-west). Strand-on-the-Green’s nearest 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). The countryside around Strand-on-the-Green includes Richmond Hill and Kew Gardens Lake.