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

Facade Sealing in Sharnal Street

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

  • Failed seals around shopfront and entrance frames
  • Gaps between rainscreen or cladding panels
  • New sealant peeling off old mastic
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
London, the South East & Scotland
CHAS accredited
£5m public liability

Need facade sealing in Sharnal Street?

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

Facade sealing in Sharnal Street

Our facade sealing work covers external facade joints, window and door perimeters, cladding panel joints and the perimeter joints where frames meet the structure on offices, blocks and industrial units. Coping and flashing joints are included where sealant is the specified fix. We work on window and door perimeters, perimeter joints where frames meet the structure and stone and brick facade joints, and the failures we are asked to look at most are unsightly perimeter sealant on a visible elevation and old perimeter mastic that has dried out. Facilities teams, main contractors and managing agents in Sharnal Street tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

Conversions of older rural buildings near smaller places such as Sharnal Street bring stone, flint, brick and timber up against new glazing. A product that grips an irregular face, with a colour that suits the building’s character, is typically what’s needed.

The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Location
Sharnal Street (ME3)
Region
Medway
Guarantee
12 months on every job
Quote
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

On site: what to expect

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you, and each area is checked before we leave it. If others near Sharnal Street need work, visits can be combined, which keeps travel down. You’ll have a fixed quote before work starts.

  1. We look at the joints, the drawings and the access before pricing.
  2. The old bead is cut away completely, not overlaid.
  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. 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

  • Make sure the joints can be reached
  • Explain the parking and delivery arrangements
  • Have the specification and drawings to hand

Ask for a quote

Send us photographs, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Get a price

Advice

Common questions from Sharnal Street clients

Does a coastal location like Sharnal Street affect which sealant is used?

It can. Driven rain and salt are tougher on outside sealant than sheltered inland conditions. That puts more weight on product choice, primers where the manufacturer specifies them, and correct joint sizing.

Can you work around term dates at a campus such as University of Greenwich - Medway?

Yes. We plan campus work around teaching, exams and residence turnarounds. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

What will the job cost?

Each job is quoted on its own details. For yours, call the office on 01277 525 020 or email the details over.

Do you replace failed glazing units?

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

How is access to upper-level joints handled?

Access is planned with you before we quote. Tell us about access: existing scaffold, what you are arranging and any site restrictions, and the quote will reflect it.

How soon can the area be used again?

We will confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

Do you need to see the site first?

Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit before quoting.

After the work

Regular inspection catches problems early. Specifically:

  • Inspect facade joints on a regular cycle
  • Clear debris that holds water against joints
  • Avoid patch repairs on failed facade joints
  • Combine resealing with other works that need access

Blocked sills and gutters push water at the joints. Sealant copes better when water runs off the facade as designed instead of soaking the joints.

Check older buildings for asbestos before disturbing old mastic. Older sealants can contain asbestos.

Facades, frames and programmes in Sharnal Street

Sharnal Street sits close to the coast, within about 2 miles. Coastal exposure means perimeter and cladding joints work harder than on an inland job, and the sealant, primer and backing need choosing with that in mind. Central London is about 29 miles from Sharnal Street. Commuter-belt towns tend to see a steady flow of new flats, offices and commercial schemes, so mastic packages have to keep pace with busy programmes.

School extensions, at buildings such as High Halstow Primary Academy, typically run to the summer holidays, mastic included. Older buildings in the area around Sharnal Street, such as Restoration House (4.9 miles south-west of Sharnal Street), need care when sealed: the product has to suit soft or historic materials.

Sharnal Street is about 5 miles north of Gillingham, in Medway. Anywhere in ME3, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Sharnal Street is one of 54 places we cover in Medway for facade joints. Our London page has more on work in that area, about 29 miles away.

We take on facade joints across the ME3 postcode area, for business premises of every kind. We also cover Fenn Street (1 mile north-east), High Halstow (1 mile north-west), Tunbridge Hill (1 mile south-east), Kingsnorth (1 mile south-east) and Hoo St Werburgh (1 mile south-west). Bigger towns within reach include Gillingham (5 miles south), Chatham (6 miles south), Rochester (5 miles south-west), Rainham (6 miles south), Strood (5 miles south-west) and Luton (5 miles south).

Near you in Sharnal Street

Around Sharnal Street, our work takes us to commercial buildings near The Hundred of Hoo Academy and The Red Dog Public House and the streets around them. For rail, the closest station is Gillingham (Kent) station, about 3.9 miles south of the centre. A little further out are Upnor Castle (3.2 miles south-west) and Medway Maritime Hospital (4.5 miles south). Not far away are Bishop Saltings.

Map of Sharnal Street © OpenStreetMap contributors

Common problems we fix in Sharnal Street

Three-sided adhesion is a classic installation fault. Without rod or bond-breaker tape, the bead is held back.

Any of the following is a good reason to get the joints checked over:

  • Water coming in around window frames
  • Weathered facade joints that have lost their grip
  • Discoloured or dirty facade joints
  • Facade joints cracked through the middle

For contractors on a campus like University of Greenwich - Medway, 3.4 miles south-west of Sharnal Street, facade and perimeter sealing has to fit around students and term dates.

Comparing quotes

  • How the joint faces will be prepared and primed
  • The named product and why it was chosen
  • Can the work be phased to keep areas open?
  • How the existing material will be dealt with

Choosing a commercial sealant contractor

Different surfaces, different methods

Precast concrete panels

Precast panel joints have to absorb thermal and structural movement. A sealant of the right movement class goes in over backing rod.

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.

When it isn’t the sealant

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

  • Water getting in through cracked render or porous masonry
  • Arranging specialist high-level access, which is planned with the client
  • Joints too narrow for the movement they take, which need redesign

Not sure which it is? You can call the office on 01277 525 020 or send photos by email and we will tell you honestly before you book.

Where we work in Sharnal Street

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

When to bring in a specialist

For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Accreditations

Trusted. Accredited. Insured.