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

Facade Sealing in Petersham

Facade sealing for Petersham, from a contractor working since 2005. Fully insured, with a 12-month guarantee.

  • Sealant pulling away from frames or panels
  • Weathered joints at frame-to-structure perimeters
  • Unsightly perimeter sealant on a visible elevation
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
Constructionline member
£5m PL insurance

Facade sealing in Petersham

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

How we handle facade sealing in Petersham

Water ingress at window frames is a frequent reason facilities managers contact us. Very often the perimeter bead has cracked or lost its grip. If the evidence points away from the sealant, we say so before quoting. Site teams most often ask us about water coming in around window frames and hard, chalky sealant that no longer flexes, across perimeter joints where frames meet the structure, stone and brick facade joints and shopfront frames. Most enquiries from Petersham start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.

Building sites in London tend to be tight: limited storage, booked deliveries and access shared with other trades. We fit around the programme, sealing each elevation or floor as other trades hand over.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Location
Petersham (TW10, TW1)
Region
Greater London
Cover
12 months on our workmanship
Quote
A fixed quote before we start
Call
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Why deal with it now?

A few metres of new sealant compare well with replacing ceilings, linings or damaged stock. Leaks travel along the structure, often turning up far from the joint. In a London building, a failed joint rarely affects only one party. Dealing with it early is simpler for everyone.

What a job costs comes down to how many linear metres there are, what has to come out first and how the joints are reached. Call for a fixed quote when you are ready.

What you get with us

  • Failed material removed, not covered up
  • Constructionline member
  • CHAS accredited
  • Over 20 years of commercial sealing

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

Keeping the joints sound

Once the work is signed off, a little attention goes a long way:

  • Investigate damp beside windows promptly
  • Check the asbestos register before old mastic is disturbed
  • Share access with other external trades
  • Keep pressure washers away from fresh sealant

Include facade joints in your planned maintenance inspections. Watch for splits, gaps at the edges, hardening and discolouration; note where they appear.

Building facade joints into a maintenance cycle avoids emergency repairs. Regular checks let you renew joints before water gets in, rather than waiting for a ceiling stain.

How the quote is worked out

The price varies from site to site. Expect it to depend on:

  • Travel to remote or island sites
  • Site requirements such as inductions and permits
  • Removal of failed or old sealant
  • Access and working height

A quote for facade joints depends on how many there are, their condition and the access, plus any specification you are working to. Call for a quote.

Before you send an enquiry

To price the job accurately, we need a clear picture of the site. Useful things to include:

  • Clear photographs of the problem areas
  • Whether an asbestos survey exists
  • Approximate linear metres or a joint schedule
  • Access details, including height

A handful of photos and a postcode is the fastest way to a quote. Upload them with the quote form, or call 01277 525 020 or email the details over to discuss it first.

Facades, frames and programmes in Petersham

Site traffic in Petersham falls within London’s ULEZ, like everywhere else in Greater London. Deliveries are booked and storage is tight, so mastic materials come in as needed. The area within 2 miles of Petersham holds a good number of hotels. When hotels extend or refit, the work is usually squeezed between peak periods, mastic included.

For contractors refurbishing units at places like St. George's Industrial Estate, 1.2 miles to the south of Petersham, the mastic covers cladding panels, roller-door and window perimeters. New wings at hospitals like Cassel Hospital, 1 mile south of Petersham, bring long runs of window and panel joints to seal.

Petersham is about 1 mile south of Richmond, in Greater London. Across the TW10 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Across Greater London, 764 places are covered, Petersham among them. Sites around London have their own page, about 10 miles away.

Business premises anywhere in TW10 and TW1 are within our area. Streets here include Sandy Lane, River Lane and Arosa Road, and sites on any of them can send details for a fixed quote. Sites close to Petersham are covered too, including Richmond (1 mile north), Ham (1 mile south), Eel Pie Island (1 mile west), St Margarets (1 mile north-west) and Strawberry Hill (1 mile south-west). Further afield, our area takes in London (10 miles east), City of Westminster (8 miles north-east), Marylebone (8 miles north-east), Kensington (6 miles north-east), St Pancras (10 miles north-east) and Shoreditch (11 miles north-east).

What’s near Petersham

We work on buildings around St Catherine's School, Grey Court School and Marble Hill Park and the streets around them. The nearest railway station is St Margarets (London) station, about 0.9 miles north-west of the centre. A little further out are Bentall Centre (2.4 miles south) and Eel Pie Island Museum (1 mile west). For a walk, there’s Kew Gardens Lake and Richmond Hill.

Map of Petersham © OpenStreetMap contributors

When to call us in Petersham

The wrong product causes its share of trouble: an acetoxy cure can mark stone or corrode some metals, and interior products break down outdoors. Neutral-cure, facade-grade products are what most external joints need.

Common reasons buildings call us in:

  • Cold air coming in at window perimeters
  • Failed sealant on precast panel joints
  • Failed seals around shopfront and entrance frames
  • Old perimeter mastic that has dried out

Further education sites such as Richmond-upon-Thames College (1.7 miles west of Petersham) are extended and refurbished from time to time, with mastic often programmed into the summer break.

Comparing quotes

  • Do they follow the manufacturer’s priming guidance?
  • What the guarantee covers, and for how long
  • Who will actually carry out the work
  • Their approach to joint depth and backing

Our contractor checklist

What sealant work can’t fix

Our job is the joint, not everything around it. Sealant alone won’t deal with:

  • Water getting in through cracked render or porous masonry
  • Work on the window or framing system itself
  • Joints whose design needs changing by the specifier

If in doubt, speak to us on 01277 525 020 or send photos by email and we will say what we think.

What we seal

  • Perimeter joints where frames meet the structure
  • Cladding panel joints
  • Shopfront frames
  • Coping and flashing joints
  • Window and door perimeters
  • Stone and brick facade joints

On site: what to expect

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. Then we strip out anything that has failed, prepare every joint and seal it. In Petersham, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. We look at the joints, the drawings and the access before pricing.
  2. Failed sealant is cut out along its full length.
  3. Joint faces are cleaned to firm, sound material, with primer where the sealant maker specifies it.
  4. Closed-cell rod fixes the depth, and the sealant grips two sides only.
  5. The new sealant goes in and is tooled firmly onto both faces.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Preparing the site

  • Confirm the product named in the specification
  • Let us know about inductions and permits
  • Send asbestos survey details if the building is pre-2000

Getting a fixed quote

Specifications, drawings and tender packages are welcome with any enquiry, and we will price against exactly what is specified. For smaller jobs, photos and a description will do.

Ask for a quote

Read more

Petersham: questions and answers

Is St. George's Industrial Estate, near Petersham, within your area?

Yes, sites like St. George's Industrial Estate are within our area, along with the rest of Petersham. To start, just call 01277 525 020 or send photos by email with the unit, the joints involved and your access times.

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

Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards.

Will you come and look before quoting?

That depends on the size and complexity of the job. Simple work can often be priced from photographs, and bigger or more complex jobs normally get a visit.

How long does a typical visit take?

We plan the time on site around your programme and access. We’ll give you an estimate of time on site when we quote.

How long before the joints can be used?

We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

Do you take on multi-site work?

Yes. A group of buildings can go on one quote, with one point of contact.

Accreditations

Trusted. Accredited. Insured.