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

Facade and window perimeter sealing in Feltham, Greater London

Looking for facade sealing in Feltham? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Unsightly perimeter sealant on a visible elevation
  • Patch repairs that keep failing
  • Leaks at window and door perimeters
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Facade sealing in Feltham

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Keeping the joints sound

Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Insist on a full cut-out when joints are renewed
  • Add perimeter sealant to planned maintenance checks
  • Clear debris that holds water against joints
  • Record the product and colour used on each elevation

Include facade joints in your planned maintenance inspections. Signs to look for are cracking, edges lifting, chalking and stiffness; note where they appear.

In pre-2000 buildings, check the asbestos register before old sealant is cut out. Some older mastics contain it, and work stops until it’s tested if it’s suspected.

How we handle facade sealing in Feltham

Facade sealants sit in the sun, rain and frost every day. How long a joint lasts depends on the movement it takes, its exposure, the product and how well it was installed. When the time comes, we cut the old sealant out completely and start again. Most enquiries involve hard, chalky sealant that no longer flexes and perimeter joints where frames meet the structure, on window and door perimeters, cladding panel joints and stone and brick facade joints. One point of contact handles commercial sealant work in Feltham from the first photos to the final walk-round, whether it’s one building or several.

Construction in a London area such as Feltham means working on constrained sites: small compounds, delivery slots and shared hoists and scaffold. We fit around the programme, sealing each elevation or floor as other trades hand over.

Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Feltham (TW14, TW13)
Region
Greater London
Guarantee
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

Signs you need facade sealing in Feltham

The wrong product causes its share of trouble: acetoxy-cure silicone may mark stone or corrode certain metals, and an interior product won’t last outdoors. Most external joints call for a neutral-cure, facade-grade sealant.

Common reasons buildings call us in:

  • Leaks at window and door perimeters
  • Failed sealant on precast panel joints
  • Failed seals around shopfront and entrance frames
  • Previous reseals run over old sealant

Work at a hotel such as St Giles Hotel (less than half a mile north-east of Feltham) tends to be programmed around bookings, mastic included.

Before you book anyone

  • Their pre-qualification and accreditations
  • What site paperwork they can supply
  • How the joint faces will be prepared and primed
  • Their approach to joint depth and backing

Questions to ask before you appoint anyone

Common questions from Feltham clients

Can you work at a site such as Maple Industrial Estate, by Feltham?

Yes. We cover Feltham and the area around it, including industrial estates, business parks and retail parks such as Maple Industrial Estate. Send details of the unit and the work through our quote form for a quick quote.

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

Yes, hospitals are one of the sectors we cover. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

Will you just go over the old sealant?

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

Do you replace windows or glass?

No. We don’t install glazing systems, windows or glass. We seal the joints around them, including perimeters where frames meet the structure.

When is resealing likely to be due?

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.

How long does a job like this take?

That varies with the scale of the job, but the work typically takes anything from a single day to several weeks, depending on joint lengths, access and the weather. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.

Can you just add new sealant on top?

No. Overlaying is a shortcut that peels away quickly. We remove the failed sealant, clean the faces, set the depth and reseal.

Leave it or put it right?

Open facade joints also let air and dirt through: occupants notice draughts and cold spots around windows. Resealing deals with the draught as well as the leak. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we’ll explain how it’s made up.

Why clients in Feltham choose us

  • Failed material removed, not covered up
  • CHAS accredited contractor
  • Colours chosen to suit frames, cladding or finishes where possible
  • A fixed quote before work starts

Take a look at how commercial sealant jobs are priced or our accreditations.

Commercial clients in Feltham

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Feltham can form part of a wider programme.

Main contractors use us as their sealant subcontractor. Programme, specification and site rules come first, and our applicators hold CSCS cards.

Sites and facades in and around Feltham

Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Feltham. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. A 2-mile radius around Feltham takes in plenty of hotels. When hotels extend or refit, the work is usually squeezed between peak periods, mastic included.

For contractors on a campus like St Mary's University, which lies east of Feltham, facade and perimeter sealing has to fit around students and term dates. New wings at hospitals like Ashford Hospital (to the west of Feltham) bring long runs of window and panel joints to seal.

Feltham is about 6 miles south-west of Ealing, in Greater London. Businesses, contractors and managing agents in Feltham can call on us for facade joints, as part of our coverage of Greater London. Our Greater London coverage takes in 764 places. Sites around London have their own page, roughly 14 miles from Feltham.

Anyone looking for facade sealing in TW14 and TW13 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Streets here include High Street, Railway Terrace and Sandycombe Road, and sites on any of them can send details for a fixed quote. Feltham sits on or close to the A244 and B377, which helps when planning parking and deliveries for the job. We also cover Bedfont (1 mile west), Hounslow (1 mile south-west), Hatton (1 mile north), Ashford Common (2 miles south-west) and Cranford (2 miles north). Bigger towns within reach include London (14 miles east), City of Westminster (12 miles east), Marylebone (12 miles north-east), Kensington (10 miles east), St Pancras (14 miles north-east) and Shoreditch (15 miles east).

Local landmarks in Feltham

We work on buildings around Hounslow Heath, Moon On The Square pub and Rivers Academy West London, among other places. There’s a railway station in Feltham itself: Feltham station. Nearby you’ll also find Hounslow Hospital (2.3 miles north-east) and Kempton Steam Museum (1.6 miles south). Not far away are Richmond Hill and Pevensey Road Nature Reserve.

Map of Feltham © OpenStreetMap contributors

On site: what to expect

Our CSCS-carded applicators arrive with the sealants, primers and backing rod the job calls for. Joint faces are cleaned back to sound, dry surfaces, the manufacturer’s primer is applied where it’s called for, and each bead is tooled to a neat concave finish. In Feltham, 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.

  1. Access, site rules and timing are settled with the client up front.
  2. Weather and temperature are checked against the product’s limits.
  3. We remove the old bead and check the edges are sound.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. We hand over with our 12-month workmanship guarantee.

Preparing the site

  • Point out parking and an unloading spot
  • Make sure the joints can be reached
  • Tell us what induction or permit system the site runs

Get a fixed quote

A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or speak to us on 01277 525 020 or use the quote form if you’d rather talk the job through.

Get a quick quote

Read more

Site staff or a sealant specialist?

For a quick touch-up, site staff may be fine, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.

Accreditations

Trusted. Accredited. Insured.