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

Facade Sealing in Alton

Work needed on a facade joint in Alton? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Previous reseals run over old sealant
  • Gaps between rainscreen or cladding panels
  • Facade joints cracked through the middle
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
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 & Constructionline
£5m public liability

Facade sealing for businesses in Alton

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

How a job runs

Diagnose, treat, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and we finish with a walk round so the work can be signed off. Most work in Alton is one building at a time: a school, a unit, an office or a block. We start with your photographs, drawings or a site visit, then send a fixed quote.

  1. We plan access and the order of elevations with the client.
  2. Weather and temperature are checked against the product’s limits.
  3. We remove the old bead and check the edges are sound.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. We hand over with our 12-month workmanship guarantee.

Before we start on site

  • Send your site hours and access windows
  • Confirm the product named in the specification
  • For older buildings, check the asbestos register before work

Getting a fixed quote

To get a fixed quote, phone 01277 525 020 or email drawings and photos with the site address and an outline of the work. Our quote form is another easy route.

Get a quick quote

Related advice

Facade sealing in Alton

Installing framed glazing systems isn’t part of our work. We handle the sealant joints that surround those elements: the frame-to-structure perimeter, panel-to-panel joints and window and door surrounds. The enquiries we see most involve new sealant peeling off old mastic and cladding panel joints that have opened up, on cladding panel joints, perimeter joints where frames meet the structure and coping and flashing joints. Most enquiries from Alton start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.

In towns like Alton, sites are normally modest: small housing schemes, extensions to schools and surgeries, refurbished shops and offices. The perimeter and facade joints on a small scheme need the same sizing and preparation as on a big one.

What our 12-month guarantee covers is the way we did the job: preparation, application and finish. It doesn’t extend to damage, other trades’ later work or movement the joint was never designed to take.

Mastic Doctor team members lined up next to their branded vans outside an office building
Where
Alton (GU34)
Wider area
Hampshire
Cover
12 months on every job
Quote
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

After the work

To get the most from the new sealant:

  • Insist on a full cut-out when joints are renewed
  • Brief window cleaners about newly sealed joints
  • Note when each elevation was last resealed
  • Walk the elevations once or twice a year

Record the sealant type and date on the building file. Future work can then match the product and colour across the elevation.

Don’t wait for a full elevation to fail. Small repairs stop small leaks becoming large ones inside the building.

Building owners, agents and FMs in Alton

As a CHAS accredited contractor and Constructionline member, we are straightforward to vet for your supplier list. Our insurance certificate can be sent along with the quote.

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

Sites and facades in and around Alton

A number of hotels sit less than 2 miles from Alton. Hotel schemes tend to have fixed reopening dates, so the mastic is programmed tightly with the other trades. Alton sits in one of the drier corners of the country, the South East. That doesn’t stop wet spells, or frosty starts that leave panels too damp to seal, so we time external mastic for dry faces and agree it with the site team.

New wings at hospitals like Alton Community Hospital, 0.9 miles south-west of Alton, bring long runs of window and panel joints to seal. Historic houses such as Bentworth Hall, 3.2 miles west of Alton, are a reminder of the older buildings in the wider area, where sealing against old stone, brick or timber needs compatible products. Units on estates such as Kerridge Industrial Estate (under half a mile north-east of Alton) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.

Alton is about 10 miles south-east of Basingstoke, in Hampshire. Across the GU34 postcode area, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Alton is one of 723 places in Hampshire on our list. Our Reading page has more on work in that area, about 21 miles away.

Work on facade joints is covered throughout GU34. Among the streets we cover are High Street, Station Road and Goswell Square, and sites on any of them can send details for a fixed quote. Being close to the A339 and B3004, Alton is straightforward for us to reach. Sites close to Alton are covered too, including Chawton (1 mile south-west), Holybourne (2 miles north-east), Neatham (2 miles north-east), East Worldham (2 miles south-east) and Golden Pot (2 miles north). Nearby towns on our patch include Basingstoke (10 miles north-west), Farnborough (13 miles north-east), Fleet (10 miles north-east), Aldershot (11 miles north-east), Petersfield (10 miles south) and Yateley (14 miles north-east).

What’s near Alton

In Alton, that means premises near Amery Hill School, Treloar School and The 'Baker's Arms' Public House. Alton has its own railway station: Alton station. Nearby you’ll also find Allen Gallery (under half a mile east) and Alton Community Hospital (0.9 miles south-west). Not far away are Holybourne Hill.

Map of Alton © OpenStreetMap contributors

Quoting for work in Alton

We price every job individually. The things that drive the figure:

  • The site’s rules and procedures
  • Joint width, depth and condition
  • Specialist products, such as fire-rated or hygienic sealants
  • Travel to remote or island sites

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.

What we need to price the job

A few photos plus some basic facts will normally do. It helps to include:

  • The product your specification calls for
  • Your programme or deadline
  • Anything awkward about access or site hours
  • Where the site is, with the postcode

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.

What sealant work can’t fix

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

  • Replacing glass or failed glazing units
  • Joints too narrow for the movement they take, which need redesign
  • Specialist high-level access methods

Not sure which it is? You can speak to us on 01277 525 020 or use the quote form and we will tell you honestly before you book.

What we seal

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

Site staff or a sealant specialist?

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Common questions from Alton clients

Do you take on work at healthcare sites like Alton Community Hospital?

Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.

Will you fit the mastic around our build programme in Alton?

Yes. The mastic is planned around your key stages. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.

Does weather matter for sealant work?

For external joints, yes. The joint has to be dry and within the product’s temperature range, so frost, rain or cold mornings can delay outside work. Internal work is rarely affected.

Can you just add new sealant on top?

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

What type of sealant goes on window perimeters?

The product follows the joint’s movement, the surfaces and the specification. Specifications often refer to BS EN 15651-1 for facade sealants or BS EN 15651-2 for glazing.

Who decides which product is used?

The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

Is your workmanship covered by a guarantee?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

Accreditations

Trusted. Accredited. Insured.