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

Facade and window perimeter sealing in Gillingham, Medway

Facade joint and window perimeter sealing on commercial buildings throughout Gillingham and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.

  • Weathered joints at frame-to-structure perimeters
  • Leaks at window and door perimeters
  • Unsightly perimeter sealant on a visible elevation
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
£5m public liability

Facade sealing for Gillingham sites

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

Facade sealing in Gillingham, done properly

Sealant around windows, doors and cladding panels stops rain reaching the wall behind. When a perimeter bead splits or peels, water finds its way behind frames and into the structure. We remove failed sealant and install a new bead chosen for the joint and how far it moves. The enquiries we see most involve facade joints cracked through the middle and air leaks through failed facade joints, across cladding panel joints, window and door perimeters and stone and brick facade joints. Facilities teams, main contractors and managing agents in Gillingham tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Business parks and retail centres around large towns like Gillingham are refurbished and reclad as tenants change. Each job leaves facade and perimeter joints that need the right sealant, backing rod and depth.

Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and we explain exactly what that covers when we quote.

Where
Gillingham (ME8, ME7, ME4, ME5)
Region
Medway
Guarantee
12 months on our workmanship
Quotes
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

Diagnose, treat, sign off

When we get to site, we sign in, go through any site induction and check how permits are handled. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, and the work typically takes a day or two for a few elevations, and longer where access has to be moved around the building. In a large town like Gillingham, work on busy buildings is planned area by area, keeping disruption low. Send drawings or photos and we’ll set out a phasing plan with the quote.

  1. We start with photos, drawings or a visit to see the joints and agree 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 goes on where the product data asks for it.
  5. Rod goes in to fix the depth, then the joint is sealed and tooled.
  6. The finished joints are checked with you.

What we need from you

  • Send your site hours and access windows
  • Clear stock, furniture or equipment away from the joints
  • Tell staff and tenants when we will be in

Get a fixed quote

Quotes are fixed against the scope you send, so the cost is agreed before work starts. To start the process, phone 01277 525 020 or send photos by email.

Get a price

Advice

Mastic packages on Gillingham sites

The sea is no more than about 2 miles from Gillingham. Schemes this close to the sea see their facade joints tested by wind and rain from the day they’re sealed, so joint design, primers and product choice deserve extra care. Gillingham is about 30 miles from central London. Construction around the commuter belt mixes station-side flats with refurbished offices and units, which keeps mastic packages in demand.

New units and refits on sites such as Gillingham Business Park, 0.5 miles to the south of Gillingham, need their panel and perimeter joints sealed to the specification. When a school such as Featherby Junior School is extended or refurbished, the mastic package is often squeezed into the holidays. Further education sites such as MidKent College Gillingham Campus (to the north-west of Gillingham) are extended and refurbished from time to time, with mastic often programmed into the summer break.

Gillingham is about 30 miles east of London, in Medway. Any commercial site in Gillingham is covered. 54 places across Medway fall within our area, Gillingham among them. For work in that direction, see our London page.

Work on facade joints is covered throughout ME8, ME7, ME4 and ME5. For a building on Leeds Square, London Road and Dorset Square or nearby, send details and we will quote for facade joints. Gillingham sits on or close to the A2 and A231. Nearby places we also cover include Twydall (1 mile east), Lower Twydall (1 mile north-east), Grange (1 mile north), Darland (1 mile south-west) and Hale (1 mile south-west) for facade joints. Further afield, our area takes in Rochester (4 miles west), Strood (4 miles west), Lordswood (3 miles south-west), Hoo St Werburgh (4 miles north), Rochester Riverside (3 miles north-west) and Frindsbury (4 miles north-west). As one of the bigger centres in Medway, Gillingham has a broad mix of commercial, public and industrial buildings.

What’s near Gillingham

In Gillingham, that means premises near The Robert Napier School, The Robert Napier School and The Star pub. For rail, the closest station is Gillingham (Kent) station, roughly 1.5 miles north-west of the centre. Well-known places in the area include Medway Maritime Hospital (1.6 miles west) and Six Poor Travellers House (3.3 miles west). Open spaces near Gillingham include Blue Bell Hill and Bishop Saltings.

Map of Gillingham © OpenStreetMap contributors

For managing agents and facilities managers

For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.

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

After the work

After handover, these steps help:

  • Investigate damp beside windows promptly
  • Keep sills, gutters and drainage paths clear
  • Brief window cleaners about newly sealed joints
  • Ask about asbestos in pre-2000 mastic

Look at perimeter and panel joints as part of routine building checks. Signs to look for are cracking, edges lifting, chalking and stiffness; record the locations.

Use each reseal to correct the joint: the right width, backing rod and a sealant with enough movement capability. A well-designed joint lasts longer than a like-for-like copy of a failed one.

Quoting for work in Gillingham

We price every job individually. The main factors are:

  • Phasing around occupants
  • How much existing material needs removing
  • Induction, permit and paperwork requirements
  • Location, for remote and island sites

The price depends on how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a fixed quote when you’re ready.

Details that help us quote

For an accurate fixed quote, we need a clear picture of the site. Useful things to include:

  • What the building is and how it’s used
  • Where the site is, with the postcode
  • Drawings or a marked-up plan, if available
  • The product your specification calls for

For a fixed quote, give us a call on 01277 525 020 or email the details over, telling us the site location and the nature of the job. You can also send details through our quote form.

Why act early in Gillingham

Scaffold or access already on site makes resealing much simpler. Combine it with planned external works and you only arrange access once, which is often the biggest saving. Water getting in through a failed joint can damage finishes, stock and fittings, and putting that right normally costs more than the reseal. It’s worth fixing at the first sign.

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.

What you get with us

  • RAL and finish matching where the product range allows
  • Joints cleaned back to sound surfaces
  • CHAS accredited
  • A fixed quote before work starts

Take a look at what affects the cost and our accreditations and insurance.

FAQs: Gillingham

Can you work on a hospital site such as Medway Maritime Hospital?

Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.

Could you schedule work at a campus like University of Greenwich - Medway for the vacation?

Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Do you take on small jobs?

Single areas, one-off repairs and whole buildings are all quoted the same way: send details, get a fixed quote, we seal, guaranteed.

Do you run new sealant over the existing bead?

No. Overlaying is a shortcut that peels away quickly. We remove the failed sealant, clean the faces, set the depth and reseal.

Can you follow the specification on our project?

Yes. The specification and the manufacturer’s installation guidance are what we work to.

Are you CHAS accredited and on Constructionline?

Yes. We are CHAS accredited and a Constructionline member.

Can you find out why a window is leaking?

Yes. We check the sealant joints and report what we find. Where the cause seems to be elsewhere, we’d rather tell you than reseal pointlessly.

Site staff or a sealant specialist?

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.

Redoing a failed joint typically costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Accreditations

Trusted. Accredited. Insured.