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

Colliers Green facade sealing

Facade joint and window perimeter sealing on commercial buildings in Colliers Green. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Discoloured or dirty facade joints
  • Gaps between rainscreen or cladding panels
  • New sealant peeling off old mastic
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Facade sealing for businesses in Colliers Green

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

About our facade sealing in Colliers Green

We are often asked to look at water coming in around frames. Failed perimeter sealant is a frequent cause, but not always. We will tell you if we think the leak is coming from somewhere sealant won’t fix. Site teams most often ask us about damp patches beside frames after rain and failed seals around shopfront and entrance frames, across window and door perimeters, perimeter joints where frames meet the structure and coping and flashing joints. A specialist sealant contractor works differently from a general builder: in Colliers Green, that means joint design, primers and backing rod as standard.

Construction in and around smaller places such as Colliers Green is often barn conversions, small groups of houses or extensions to halls and schools. Each still needs a proper mastic package: window perimeters, facade joints and internal sealant to the specification.

We sign every job off with a 12-month guarantee. The promise is simple: if the work we did fails within twelve months, we return to fix it.

Where
Colliers Green (TN17)
Wider area
Kent
Cover
12 months on our workmanship
Quote
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

When to call us in Colliers Green

The wrong product causes its share of trouble: an acetoxy cure can mark stone or corrode some metals, and interior products break down outdoors. Most external joints call for a neutral-cure, facade-grade sealant.

Look out for the following:

  • Hard, chalky sealant that no longer flexes
  • Failed seals around shopfront and entrance frames
  • Draughts around frames and panels
  • Cladding panel joints that have opened up

When a school such as Colliers Green Church of England Primary School is extended or refurbished, the mastic package is often squeezed into the holidays.

Comparing quotes

  • Their public liability cover
  • Are they CHAS accredited or on Constructionline?
  • What the guarantee covers, and for how long
  • Can the work be phased to keep areas open?

Choosing a commercial sealant contractor

Diagnose, treat, sign off

In a busy building, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before we move to the next. Smaller jobs around Colliers Green can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  1. Photos, drawings or a visit tell us about the joints and the access.
  2. We confirm the joint type, movement and the specified product.
  3. Failed beads are removed in full and both faces cleaned back.
  4. Primer is applied where the maker specifies it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. We go over the completed work with you before leaving.

Getting the site ready

  • For older buildings, check the asbestos register before work
  • Let us know about inductions and permits
  • Explain the parking and delivery arrangements

Getting a fixed quote

Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.

Get a price

Related advice

Looking after the joints

Cleaning and maintenance staff play a part too. Pass these on to them:

  • Add perimeter sealant to planned maintenance checks
  • Plan facade sealing alongside redecoration
  • Brief window cleaners about newly sealed joints
  • Note when each elevation was last resealed

Record the sealant type and date on the building file. Future work can then match the product and colour without guesswork.

Planned resealing is cheaper than reacting to leaks. Regular checks let you renew joints before water gets in instead of after the damage.

Mastic packages on Colliers Green sites

Colliers Green is about 37 miles from central London. Towns within reach of London tend to keep building, from flats to offices and schools, which keeps mastic packages in demand. Rainfall across the South East, Colliers Green included, is lower than in many parts of the UK. Winter mornings still bring frost and condensation on frames and panels, which is why external dates are agreed with the site manager.

Units on estates such as Hartley Dyke Business Centre (to the south of Colliers Green) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal. Extensions at sites like Benenden Hospital (to the south-east of Colliers Green) usually sit beside working departments, and the mastic follows strict access rules.

Colliers Green is about 7 miles south-east of Paddock Wood, in Kent. Looking for facade sealing in Colliers Green? We can help, as we do across Kent. Colliers Green is one of 931 places we cover in Kent. For work in that direction, see our Brighton page, about 34 miles away.

Commercial sites across TN17 are covered for facade joints. Just outside Colliers Green, we also work in Flishinghurst (1 mile south), Horden (1 mile north), Wilsley Green (2 miles south-east), Wilsley Pound (2 miles south-east) and Cranbrook Common (2 miles east). A short drive away, we cover Maidstone (10 miles north), Ashford (15 miles east), Royal Tunbridge Wells (11 miles west), Tonbridge (12 miles north-west), Kings Hill (11 miles north-west) and Foley Park (11 miles north).

Around Colliers Green

We work on buildings around High Weald Academy and The Gill. The closest station to Colliers Green is Marden station, about 3.9 miles north. A little further out are Sissinghurst Castle (3 miles east) and Benenden Hospital (5.1 miles south-east).

Map of Colliers Green © OpenStreetMap contributors

Building owners, agents and FMs in Colliers Green

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

Doing it in-house

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

There’s also the paperwork. Many sites expect CSCS cards, RAMS and proof of insurance, and we’ll confirm the paperwork you need with the quote.

What the job involves on each surface

Perimeter joints at frames and structure

The joint around a framed system, where it meets the structure, needs sealant. Our work is that perimeter joint rather than the system it surrounds.

Precast concrete panels

Concrete edges can be dusty or weak. We clean back to sound material and flag edges that need repair first.

Colliers Green: questions and answers

Is hospital work, at somewhere like Benenden Hospital, something you do?

Yes. We work in healthcare settings as well as offices and schools. Work is phased so departments keep running, under the site’s own rules.

Can you work at a site such as Hartley Dyke Business Centre, by Colliers Green?

Yes. Estates, retail parks and business parks around Colliers Green, Hartley Dyke Business Centre among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.

Do you use silicone for external joints?

It depends on the joint, the substrate and any specification. BS EN 15651 Parts 1 and 2 cover facade and glazing sealants, and specifications often name them and we follow the specified product.

Will you quote for a small job?

We quote for single jobs as well as large packages and programmes. Photos and a description are enough to start.

Can you work while the building is occupied?

Yes, with some planning. Tell us your site hours and access windows and we will plan around them.

Do you hold CHAS accreditation?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.

How do you choose the sealant?

Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Accreditations

Trusted. Accredited. Insured.