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

Commercial sealant contractors in Charter Alley, Hampshire

Commercial sealant contractors in Charter Alley, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Mouldy silicone around WCs, urinals and vanity tops
  • A top-up bead over failed sealant, now lifting
  • Wall and floor joints that have lost their seal
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
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Commercial sealant contractors for businesses in Charter Alley

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

About our commercial sealant contractors in Charter Alley

Sealant joints are easy to overlook until one lets water in, and on a working site that usually surfaces as a leak, a stain or a complaint from occupiers. Mastic Doctor works as a commercial sealant contractor for facilities managers, managing agents and main contractors. Our job is to diagnose the failure, remove the old bead and seal again using a product chosen for the movement and exposure. If you have earlier reseals applied straight onto the failed bead and weathered facade sealant that no longer flexes, we can put it right. Facilities teams, main contractors and managing agents in Charter Alley tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

A lot of what we do in Charter Alley is replacing sealant that has done its years: split, chalky or peeling, with leaks or mould starting behind it.

Rural business units near smaller places such as Charter Alley are frequently converted agricultural buildings. Their mix of old walls with new frames, partitions and floors means many joints between unlike materials, and a sealant colour that suits the building’s character is often part of the brief.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we are clear about what is covered before work starts.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Charter Alley (RG26)
Wider area
Hampshire
Guarantee
12 months on our workmanship
Quotes
Quoted before any work starts
Phone
01277 525 020
Page updated
3 November 2026

When to call us in Charter Alley

If only one face has lost its grip, that’s an adhesion failure. The usual causes are poor preparation, a missed primer, contamination on the joint face or sealant bonded to the base of the joint. We see it often where joints were sealed in a hurry.

These are often picked up first by site or facilities staff:

  • Leaks that seem to come through a sealant line
  • Frame sealant that has cracked, shrunk or pulled away
  • Weathered facade sealant that no longer flexes
  • Sanitary sealant that has gone black and patchy

Offices and shops close to stations such as Bramley (Hants) station, 3.8 miles to the east of Charter Alley, tend to be busy all day, so sealant work is planned around opening hours.

What to look for in a quote

  • Their plan for phasing and protecting the area
  • Do they follow the manufacturer’s priming guidance?
  • Their approach to joint depth and backing
  • Health and safety accreditation such as CHAS

Our contractor checklist

For managing agents and facilities managers

We work for building owners and managing agents on sealant work across single buildings or whole portfolios around Charter Alley. One quote can cover more than one site, which keeps the paperwork simple.

CHAS accredited and a Constructionline member, we make supplier vetting simple. We are fully insured, and our insurance certificate can go with the quote.

When it isn’t the sealant

Our job is the joint, not everything around it. On its own, sealant can’t deal with:

  • Old mastic that tests positive for asbestos
  • Cracking that needs a structural engineer to look at it
  • Faulty windows rather than failed perimeter sealant

If you’re not sure, just call 01277 525 020 or email us and we will give you a straight answer.

Joints and surfaces we work on

  • Floor and threshold joints
  • External facade joints
  • Kitchen worktops and splashbacks
  • Movement joints in walls and floors
  • Window and door perimeters
  • Washrooms and tea points

Maintenance after handover

Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Check the asbestos register before anyone disturbs old sealant in an older building
  • Keep a record of which joints were resealed and when
  • Keep abrasive pads and scrapers off resealed joints
  • Don’t let cleaning or traffic back on before the cure time is up

Keep an eye out for other trades after we’ve gone. Shop refits, new services and replaced fittings often break the seal around them, and it’s easy to forget to reseal afterwards. Where work has disturbed a joint, just call the office on 01277 525 020 or email drawings and photos for a quote.

Movement joints that fill with debris stop working. The joint can no longer close, so its edges crack or spall. At that point it’s a repair job rather than a reseal.

What Charter Alley’s businesses ask us to seal

Charter Alley sits in one of the drier corners of the country, the South East. Drier doesn’t mean dry every day, so frontage work still has some give in the dates. Central London is about 47 miles from Charter Alley. The commuter belt holds a great many offices, retail parks and business parks. If you have premises across the region, one contractor can cover them all.

Parks like Berry Court Business Park (to the north-east of Charter Alley) see tenants come and go, and every move-in brings joints to seal.

Charter Alley is about 3 miles south of Tadley, in Hampshire. Anywhere in RG26, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 723 places in Hampshire, from busy centres to rural villages. We also cover Reading, some 12 miles away.

Anyone looking for commercial sealant contractors in RG26 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Streets here include Old Chapel Lane, Sand Martin Close and White Hart Lane. Nearby places we also cover include Ramsdell (1 mile west), West Heath (1 mile north-west), Pamber End (1 mile north-east), Monk Sherborne (1 mile south-east) and Salters Heath (1 mile east). Further afield, our area takes in Basingstoke (4 miles south-east), Fleet (14 miles east), Alton (14 miles south-east), Yateley (14 miles east), Tadley (3 miles north) and Hook (8 miles east).

Landmarks near Charter Alley

The nearest railway station is Bramley (Hants) station, roughly 3.8 miles east. A little further out are Park Prewett Hospital (2.7 miles south-east) and Calleva Museum (3.4 miles north-east). Green spaces nearby include Daneshill Park Woods.

Map of Charter Alley © OpenStreetMap contributors

Surface by surface

Commercial kitchens and tea points

In kitchens, sealant lines at worktops, sinks and wall panels take heat, grease and daily cleaning. Proper degreasing comes before any new sealant, and a hygienic or food-safe sealant is used where food contact is possible.

Movement joints in walls and floors

Brickwork, blockwork and floor slabs all have movement joints that need a flexible seal. When the seal fails, debris gets in and the joint stops working. The new sealant is chosen for the movement and, on floors, the traffic.

Our process

We begin with a short walk round with whoever looks after the building, to confirm the scope, the order of work and any areas we must keep clear. Then we strip out anything that has failed, prepare every joint and seal it. Smaller jobs around Charter Alley can be grouped with others nearby. You’ll have a fixed quote before work starts.

  1. We start with the evidence: photographs, drawings or a look on site.
  2. A fixed quote follows, with removal and preparation included.
  3. Sequence, access and working times are settled before the first joint is touched.
  4. Each joint is stripped, cleaned back to sound faces and primed where the maker specifies.
  5. Backing goes in, the new sealant is laid and tooled, and the area is left neat.
  6. Completed areas are signed off with you under our 12-month guarantee.

Getting the site ready

  • Make sure the joints can be reached
  • Share the asbestos register for older buildings
  • Warn occupants and staff about the work

Quotes

Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. If you have questions first, give us a call on 01277 525 020 or use the quote form.

Get a quick quote

Advice

Common questions from Charter Alley clients

Do you offer colour-matched sealant for buildings in Charter Alley?

Yes. Colour matching to frames, cladding, stone and shop-fit finishes is a regular part of the work. The quote lists the colours the product is made in.

Can you work at a site such as Berry Court Business Park, by Charter Alley?

Yes, sites like Berry Court Business Park are within our area, along with the rest of Charter Alley. A few photographs and the unit address let us price the work.

Does commercial sealant work come with a guarantee?

Each job sits under our 12-month guarantee, starting at sign-off. Looking after the joints as we advise helps them last.

Does weather matter for sealant work?

Outside, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.

How do you keep disruption to occupiers down?

Most of the buildings we work in stay occupied. We agree the order of areas, protect what’s nearby and close off only the section we are sealing for as long as the cure needs.

Are your applicators CSCS-carded?

Yes. Our applicators hold CSCS cards, as many construction sites ask for.

Who decides which product is used?

The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.

Accreditations

Trusted. Accredited. Insured.