The Mastic Doctor team standing beside their branded vans outside an office building
Windsor and Maidenhead · England

Facade and window perimeter sealing in Old Windsor, Windsor and Maidenhead

Facade joint and window perimeter sealing on commercial buildings across Old Windsor, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Failed sealant on precast panel joints
  • Unsightly perimeter sealant on a visible elevation
  • Patch repairs that keep failing
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Signed off, with 12 months’ guarantee.
South East, London & Scotland
CHAS accredited
£5m public liability

Facade sealing for businesses in Old Windsor

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

Facade sealing in Old Windsor

Access is part of every facade job, and we plan it with you before quoting. Let us know what access exists or is planned, and any site rules we need to work around. The enquiries we see most involve old perimeter mastic that has dried out and previous reseals run over old sealant, on perimeter joints where frames meet the structure, shopfront frames and coping and flashing joints. One point of contact handles commercial sealant work in Old Windsor from the first photos to the final walk-round, for single jobs and planned programmes alike.

Conversions around smaller places like Old Windsor often join new frames to old masonry or timber, and the sealant at those junctions has to cope with two materials that move differently.

Every job is signed off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Old Windsor (SL4)
Wider area
Windsor and Maidenhead
Cover
12 months on our workmanship
Price
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026

New build and refits around Old Windsor

The area within 2 miles of Old Windsor holds plenty of hotels. When hotels extend or refit, the work is usually squeezed between peak periods, mastic included. Old Windsor sits in one of the drier corners of the country, the South East. Even so, frost and condensation on steel and glass are common on winter mornings, so we time external mastic for dry faces and agree it with the site team.

Units on estates such as Portland Business Park, 1.7 miles north of Old Windsor, tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. When a school such as King's Court First School is extended or refurbished, the mastic package is often squeezed into the holidays. Hospital estates such as Princess Margaret Hospital, 1.7 miles north-west of Old Windsor, tend to grow and change in phases, often next to occupied wards, so facade and perimeter sealing has to fit the estates team’s plan.

Old Windsor is about 2 miles north-west of Egham, in Windsor and Maidenhead. We send applicators to Old Windsor for facade joints. We work across 60 places in Windsor and Maidenhead, large and small. We also cover Reading, some 17 miles away.

Business premises anywhere in SL4 are within our area for facade joints. For a building on Church Road, Parker Gardens and Gregory Drive or nearby, we can quote for facade joints. Old Windsor sits on or close to the B3021. Sites close to Old Windsor are covered too, including Wraysbury (1 mile east), Sunnymeads (1 mile north-east), Bishopsgate (1 mile south), Datchet (2 miles north) and Englefield Green (2 miles south). A short drive away, we cover Maidenhead (8 miles north-west), Windsor (3 miles north-west), Boyn Hill (8 miles north-west), Cookham (9 miles north-west), Furze Platt (9 miles north-west) and Dedworth (3 miles north-west).

Landmarks near Old Windsor

Around Old Windsor, our work takes us to commercial buildings near St John's Beaumont School, Windsor Great Park and The Fox And Castle Public House and the streets around them. Old Windsor’s nearest station is Sunnymeads station, about 1.3 miles north-east of the centre. A little further out are Windsor Castle (2.1 miles north-west) and Berkshire Yeomanry Museum (1.6 miles north-west). The countryside around Old Windsor includes St Ann's Hill and Virginia Water Lake.

Map of Old Windsor © OpenStreetMap contributors

Honest limits

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Work on the window or framing system itself
  • Water getting in through cracked render or porous masonry
  • Movement beyond what any sealant can handle

If in doubt, phone 01277 525 020 or email the details over and we’ll say what we think.

What we seal

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

Why it’s worth doing now in Old Windsor

Every shower drives water through a split perimeter bead. Behind the frame, that can mean damp plaster, stained ceilings, corroded fixings and damaged insulation. Resealing early costs far less than repairing what the water reaches. Small buildings around Old Windsor suffer from failed joints as much as large ones. Early resealing avoids the damage that follows a leak.

Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a fixed quote and we will explain how it’s made up.

What you get with us

  • Fixed quotes based on photos, drawings or a visit
  • Colours chosen to suit frames, cladding or finishes where possible
  • Colours confirmed for the specified product
  • Work to your specification and the manufacturer’s guidance

See how commercial sealant jobs are priced and our accreditations.

For managing agents and facilities managers

For main contractors, we work as the sealant subcontractor. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

We work for building owners and managing agents on sealant work across single buildings or whole portfolios. Several sites can go on one quote, which keeps the paperwork simple.

Doing it in-house

A short, simple internal joint is often within reach of a maintenance team. 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.

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.

On site: what to expect

Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before the next one starts. What matters most for a job in Old Windsor is a clear list of what needs doing, so send photos of each area. A fixed quote follows.

  1. We look at the joints, the drawings and the access before pricing.
  2. Failed sealant is cut out along its full length.
  3. Both faces are cleaned and, where the product needs it, primed.
  4. Backing rod, or bond-breaker tape in shallow joints, limits the depth.
  5. A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
  6. The completed runs are checked with you, then the 12-month guarantee applies.

Preparing the site

  • Make sure the joints can be reached
  • Let us know about inductions and permits
  • Share the asbestos register for older buildings

Getting a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to call the office on 01277 525 020 or email the details over with what you know.

Get a price

Related advice

Questions about Old Windsor

Could you schedule work at a campus like Royal Holloway University for the vacation?

Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Does your area include sites such as Portland Business Park, near Old Windsor?

Yes. We cover Old Windsor and the area around it, including industrial estates, business parks and retail parks such as Portland Business Park. Send details of the unit and the work through our quote form for a quick quote.

How long does a typical visit take?

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

What hours do you work?

We are in the office from 8am until 5pm, Monday to Friday. Tell us your site hours and access windows and the work will be fitted around them.

Are you fully insured?

Yes. Our insurance certificate can be sent alongside the quote.

Does weather matter for sealant work?

It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.

Do you install glazing systems?

No. A glazing contractor handles that. We reseal window perimeters, panel joints and frame-to-structure perimeters.

How the quote is worked out

We price every job individually. The main factors are:

  • Any access equipment needed
  • The product specified
  • Working within restricted access windows
  • The total length or number of joints

The product called for affects the cost, as does the preparation each joint needs, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Before you send an enquiry

A good diagnosis starts with the right details. Let us know:

  • Access details, including height
  • Approximate linear metres or a joint schedule
  • A wide shot and a close-up of the area
  • Whether an asbestos survey exists

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.

Accreditations

Trusted. Accredited. Insured.