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

Facade and window perimeter sealing in Charlton, Oxfordshire

Looking for facade sealing in Charlton? It’s simple: send details, get a quote, we seal, guaranteed.

  • Previous reseals run over old sealant
  • Hard, chalky sealant that no longer flexes
  • Damp patches beside frames after rain
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Facade sealing across Charlton

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

Facade sealing for commercial buildings in Charlton

Sealant around windows, doors and cladding panels stops rain reaching the wall behind. Once a perimeter seal fails, water tracks in around frames and panels. We cut out failed facade joints and reseal them with a facade-grade sealant suited to the movement. Site teams most often ask us about failed sealant on precast panel joints and air leaks through failed facade joints, across cladding panel joints, perimeter joints where frames meet the structure and stone and brick facade joints. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Charlton is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

For a contractor on a smaller site near Charlton, one mastic visit at the right stage saves return trips. Let us know the key stages and we will time the work so nothing waits on us.

Every job ends the same way: guaranteed. You get a 12-month guarantee on our workmanship, and we explain exactly what that covers when we quote.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Charlton (OX12)
Wider area
Oxfordshire
Cover
12 months on every job
Quote
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026

From enquiry to sign-off

Occupied buildings need a little choreography. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. What matters most for a job in Charlton is a clear list of what needs doing, so send photographs of each area. You’ll then get a fixed price for the work.

  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. Closed-cell rod fixes the depth, and the sealant grips two sides only.
  5. A facade-grade sealant rated for the movement goes in, tooled to a concave profile.
  6. We walk the finished joints with you before handing over.

Preparing the site

  • Send your site hours and access windows
  • Warn occupants and staff about the work
  • Tell us which areas need to stay in use

Getting a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to ring 01277 525 020 or email the details over with what you know.

Get a quick quote

Advice

For managing agents and facilities managers

Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.

Planned maintenance programmes are welcome: resealing failed joints building by building, on a schedule that suits your budget. Charlton can form part of a wider programme across Oxfordshire.

Signs you need facade sealing in Charlton

Overlaying old sealant is a common shortcut that fails quickly. Cured silicone won’t accept a new silicone bead, so the new bead peels away within a season or two.

Look out for the following:

  • Damp patches beside frames after rain
  • Cold air coming in at window perimeters
  • Weathered facade joints that have lost their grip
  • Sealant pulling away from frames or panels

Recladding or extending a unit at a site like Elms Farm Business Park (to the north-west of Charlton) brings panel joints and frame perimeters into the programme.

What to look for in a quote

  • The terms of the workmanship guarantee
  • Their pre-qualification and accreditations
  • How the joint faces will be prepared and primed
  • How the existing material will be dealt with

Questions to ask before you appoint anyone

New build and refits around Charlton

The South East is one of the drier parts of the UK. Winter mornings still bring frost and condensation on frames and panels, so external mastic is timed for workable conditions and agreed with the site manager. Central London is about 57 miles from Charlton. Towns within reach of London tend to keep building, from flats to offices and schools, so mastic packages have to keep pace with busy programmes.

On a healthcare site such as Wantage Community Hospital (less than half a mile south-west of Charlton), new blocks and refurbishments go on while the hospital keeps running, so mastic work is sequenced carefully. Work at a hotel such as Blue Boar Hotel, 0.5 miles south-west of Charlton, tends to be programmed around bookings, mastic included.

Charlton is about 7 miles west of Didcot, in Oxfordshire. Looking for facade sealing in Charlton? We can help. We work across 423 places in Oxfordshire. For work in that direction, see our Oxford page, about 13 miles away.

We take on facade joints across the OX12 postcode area, for business premises of every kind. Among the streets we cover are Grove Road, Little Lane and Ormond Road, and sites on any of them can send details for a fixed quote. Access to Charlton is via the A417. Nearby places we also cover include Wantage (1 mile west), East Challow (2 miles west), Letcombe Regis (2 miles south-west), West Challow (2 miles west) and Childrey (3 miles west). Further afield, our area takes in Oxford (13 miles north-east), Didcot (7 miles east), Abingdon-on-Thames (8 miles north-east), Witney (14 miles north), Carterton (14 miles north-west) and Faringdon (8 miles north-west).

What’s near Charlton

Around Charlton, our work takes us to commercial buildings near Lord Nelson pub, King Alfred's and St Mary's School, among other places. Nearby you’ll also find Williams F1 Grand Prix Collection (1.8 miles north). For a walk, there’s Letcombe Valley and Chain Hill.

Map of Charlton © OpenStreetMap contributors

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. For buildings in places like Charlton, one well-planned visit beats several small ones, so we’d suggest renewing all the joints that are going, not just the worst.

There’s no price list, because the scope varies so much from one building to the next. Call for a quote.

Why us?

  • Matching to RAL references, product permitting
  • Constructionline member for supplier checks
  • CSCS-carded applicators
  • Fully insured, including public liability cover

Read what affects the cost or our accreditations and insurance.

After the work

To get the most from the new sealant:

  • Keep sills, gutters and drainage paths clear
  • Plan facade sealing alongside redecoration
  • Never let anyone seal over old sealant
  • Ask about asbestos in pre-2000 mastic

Keep gutters, sills and drainage paths clear. Sealant copes better when water runs off the facade as designed rather than sitting against the joints.

In pre-2000 buildings, check the asbestos register before old sealant is cut out. Older sealants can contain asbestos, and if it’s suspected, we stop until it has been tested.

What the job involves on each surface

Perimeter joints at frames and structure

Perimeter joints at frames often show their age first. We cut them out, prepare both faces and reseal to the specification.

Brick and stone facades

Brick and stone facades have perimeter and movement joints that need a compatible sealant. Neutral-cure products are used because acetoxy types can mark some stone, and primers go on where specified.

Common questions from Charlton clients

Does your area include sites such as Elms Farm Business Park, near Charlton?

Yes. We cover Charlton and the area around it, including industrial estates, business parks and retail parks such as Elms Farm Business Park. A few photos and the unit address let us price the work.

Is Charlton off your patch?

No. Small places get the same service as large ones. We cover Greater London and the counties of the South East. We plan jobs in smaller places so return trips are kept to a minimum.

How do you choose the sealant?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Can you find out why a window is leaking?

Yes. Photos are often enough to start, followed by a visit if needed. Many frame leaks are sealant failures, though not all.

Do you work to architects’ specifications?

Yes. Send it with your enquiry, and we will price the work to it, flagging anything that needs clarifying.

Do you replace windows or glass?

No. That work needs a glazing specialist. What we seal are the joints around frames and panels.

How is access to upper-level joints handled?

Access is planned with you before we quote. Let us know what access is in place or planned, and the quote will reflect it.

Accreditations

Trusted. Accredited. Insured.