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

Facade Sealing in South Green

Facade joint and window perimeter sealing on commercial buildings throughout South Green and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Old perimeter mastic that has dried out
  • Cladding panel joints that have opened up
  • Unsightly perimeter sealant on a visible elevation
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
£5m PL insurance

Need facade sealing in South Green?

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

From enquiry to sign-off

On arrival, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before any cutting starts, with the work itself usually taking anything from a single day to several weeks, depending on joint lengths, access and the weather. Smaller jobs around South Green can be grouped with others nearby. A fixed quote is given before anything starts.

  1. First we review photographs, drawings or what we saw on a visit, and agree how each joint will be reached.
  2. The old bead is cut away completely, not overlaid.
  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. 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.

Before we start on site

  • Tell us which areas need to stay in use
  • Confirm the product named in the specification
  • Let us know about inductions and permits

Quotes

We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, call the office on 01277 525 020 or send details through our quote form.

Ask for a quote

Read more

Facade sealing in South Green

Our facade sealing work covers external facade joints, window and door perimeters, cladding panel joints and the perimeter joints where frames meet the structure for clients around South Green. Coping and flashing joints are included where sealant is the specified fix. The enquiries we see most involve failed sealant on precast panel joints and staining on stone next to old sealant, on shopfront frames, window and door perimeters and perimeter joints where frames meet the structure. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in South Green, that means joint design, primers and backing rod as standard.

In the countryside around places like South Green, conversion schemes put new frames into old stone, flint, brick or timber. A product that grips an irregular face, with a colour that suits the building’s character, is typically what’s needed.

What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
South Green (ME9)
Wider area
Kent
Guarantee
12 months on our workmanship
Price
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026

What sealant work can’t fix

We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:

  • Render or concrete edges that have broken away
  • Joints whose design needs changing by the specifier
  • Leaks from roofs, gutters or failed flashings rather than sealant joints

If you’re not sure, just phone 01277 525 020 or email the details over and we will give you a straight answer.

Where we work in South Green

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

Different surfaces, different methods

Window and door perimeters

Frame materials vary, and so does the preparation. Primer goes on where the manufacturer specifies it for that substrate.

Coping and flashing joints

Not every coping or flashing leak is a sealant problem. Where the issue isn’t the sealant, we say so.

Site staff or a sealant specialist?

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. Getting these wrong normally costs more in the end than doing them right.

Why act early in South Green

Resealing a few window perimeters is a small job; repairing water-damaged interiors and fixings is not. Water through a failed joint rarely stays where it starts. Converted and older buildings near places like South Green tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

What you get with us

  • Commercial sealant work since 2005
  • A Constructionline member, so easy to vet
  • Work to your specification and the manufacturer’s guidance
  • Fixed quotes based on photographs, drawings or a visit

Take a look at our cost guide and how we’re accredited.

Common questions from South Green clients

Would you work within a site like KIMS hospital?

Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.

Will you take on work at estates like Newington Industrial Estate, close to South Green?

Yes. We cover South Green and the area around it, including industrial estates, business parks and retail parks such as Newington Industrial Estate. To start, just call 01277 525 020 or email drawings and photos with the unit, the joints involved and your access times.

What site paperwork can you supply?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm them with the quote.

Can you just add new sealant on top?

No. Fresh silicone won’t grip cured silicone, so the existing bead is removed entirely and the faces are cleaned before resealing. That is what makes the new joint last.

What do you charge?

We don’t publish prices, because every site is different. With photos or drawings, we can give you a fixed quote.

Will your applicators have CSCS cards?

Yes. Our applicators hold CSCS cards, which many sites require.

Do you guarantee your work?

Yes. Workmanship is guaranteed for 12 months on every job.

Signs you need facade sealing in South Green

Sometimes the substrate is the problem: crumbling render, spalling concrete or flaking paint take the sealant with them. We tell you when the edges need repairing before resealing.

Clients typically get in touch after noticing one or more of the following:

  • Previous reseals run over old sealant
  • Perimeter sealant that has split or peeled away
  • Staining on stone next to old sealant
  • Weathered facade joints that have lost their grip

New wings at hospitals like KIMS hospital, 4.5 miles west of South Green, bring long runs of window and panel joints to seal.

Comparing quotes

  • Can the work be phased to keep areas open?
  • Who will actually carry out the work
  • Their approach to joint depth and backing
  • Will RAMS and insurance details be available?

Questions to ask before you appoint anyone

Mastic packages on South Green sites

At about 35 miles from central London, South Green is within reach of the capital. Towns within reach of London tend to keep building, from flats to offices and schools, and main contractors there need mastic that keeps to the programme. The South East is one of the drier parts of the UK. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, which is why external dates are agreed with the site manager.

For contractors on a campus like Canterbury Christ Church University, 3.2 miles to the south of South Green, facade and perimeter sealing has to fit around students and term dates. Older buildings in the area around South Green, such as Leeds Castle, which lies south of South Green, need care when sealed: the product has to suit soft or historic materials.

South Green is about 4 miles south-west of Sittingbourne, in Kent. South Green sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. 931 places across Kent fall within our area, South Green among them. Our London page has more on work in that area (35 miles or so).

Business premises anywhere in ME9 are within our area. Close to South Green, our area also takes in Stockbury (1 mile north-west), Oad Street (2 miles north-east), Silver Street (2 miles east), Bredgar (2 miles east) and Danaway (2 miles north-east). Further afield, our area takes in Maidstone (6 miles south-west), Ashford (15 miles south-east), Sittingbourne (4 miles north-east), Gravesend (14 miles north-west), Faversham (10 miles east) and Minster (10 miles north-east).

What’s near South Green

Recent enquiries here include premises near Stockbury Hill Wood and The Three Squirrels pub, among other places. South Green’s nearest station is Newington station, about 3 miles north of the centre. Nearby you will also find Leeds Castle (4.4 miles south) and KIMS hospital (4.5 miles west). Open spaces near South Green include Detling Hill.

Map of South Green © OpenStreetMap contributors
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