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

Facade and window perimeter sealing in Farnham, Surrey

Commercial sealant work in Farnham for contractors, FMs and building owners: facade joint and window perimeter sealing on commercial buildings, quoted at a fixed price.

  • Perimeter sealant that has split or peeled away
  • Air leaks through failed facade joints
  • Patch repairs that keep failing
1
Send details
Drawings, photos, a joint schedule or a site visit.
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
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS accredited
£5m public liability

Need facade sealing in Farnham?

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Owners, agents and contractors

Hospitality, education, healthcare, office and retail clients come to us directly as well. We plan around the way the building is used, so the building keeps working while we do.

Building owners and managing agents use us on everything from one building to a spread of sites around Farnham. Several sites can go on one quote, which keeps the paperwork simple.

Facade sealing in Farnham

Facade joints are the line of defence between the weather and the building fabric. When a perimeter bead splits or peels, water finds its way behind frames and into the structure. We cut out failed facade joints and reseal them with a facade-grade sealant suited to the movement. We work on shopfront frames, cladding panel joints and stone and brick facade joints, and what we’re called in for most is perimeter sealant that has split or peeled away and cold air coming in at window perimeters. Looking for mastic applicators who cover Farnham? We’ve been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.

Many towns of Farnham’s size have older buildings being converted or extended, which puts new frames and panels against old brick, stone or render. Getting the product and primer right for both faces is what keeps those joints sound.

Whoever the client is, the cover is the same: a 12-month guarantee on our workmanship. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.

Mastic Doctor team members lined up next to their branded vans outside an office building
Place
Farnham (GU9, GU10)
Wider area
Surrey
Guarantee
A 12-month guarantee
Price
A fixed quote before we start
Call
01277 525 020
Updated
3 November 2026

Common problems we fix in Farnham

Adhesive failure, where the sealant peels away from one face, normally comes from poor preparation. Contamination, moisture or skipping the primer the maker specifies leave a weak bond, and movement soon pulls it away.

Typical triggers for a call:

  • Discoloured or dirty facade joints
  • Perimeter sealant that has split or peeled away
  • Cladding panel joints that have opened up
  • Draughts around frames and panels

For a contractor at a hotel such as Hotel de Vie, under half a mile to the south of Farnham, the mastic often has to be finished before a reopening date.

What your quote should include

  • Is the sealant right for the movement and the substrate?
  • Will RAMS and insurance details be available?
  • The terms of the workmanship guarantee
  • Whether primer will be used where the manufacturer specifies it

Choosing a commercial sealant contractor

Looking after the joints

After handover, these steps help:

  • Check that rainwater leaves the facade the way it was designed to
  • Check the asbestos register before old mastic is disturbed
  • Walk the elevations once or twice a year
  • 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.

Get the joint design right when resealing: 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.

Why it’s worth doing now in Farnham

If access is already up for other work, resealing at the same time makes sense. Combine it with planned external works and you only arrange access once, saving a second set-up. In Farnham, as anywhere, the simplest time to fix a failed joint is before it leaks. After a leak, there’s drying, repairs and redecoration on top.

The price depends on how many linear metres there are, what has to come out first and the access. Call for a fixed quote when you’re ready.

Why us?

  • CHAS accredited contractor
  • Constructionline member for supplier checks
  • Old sealant cut out, never sealed over
  • A fixed quote before work starts

See how commercial sealant jobs are priced and how we’re accredited.

Facades, frames and programmes in Farnham

The area within 2 miles of Farnham holds several hotels. Hotel extensions and refits typically have to fit around bookings, so mastic dates are tight. Central London is about 36 miles from Farnham. Towns within reach of London tend to keep building, from flats to offices and schools, which keeps mastic packages in demand.

For contractors on a campus like University for the Creative Arts, 0.6 miles to the north-west of Farnham, facade and perimeter sealing has to fit around students and term dates. For contractors at a school such as Farnham College, sealing has to be finished before term starts.

Farnham is about 6 miles south of Farnborough, in Surrey. Farnham sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 379 places across Surrey fall within our area, including Farnham. There’s a separate page for Reading, about 18 miles away.

Commercial sites across GU9 and GU10 are covered for facade joints. If your site is on Barncroft, Approach Road and Saxon Croft or close by, we can quote for facade joints. Being close to the A31 and A287, Farnham is straightforward for us to reach. If your building is just outside Farnham, we cover Compton (1 mile east), Hale (1 mile north), Upper Hale (2 miles north), Runfold (2 miles east) and Heath End (2 miles north). Further afield, our area takes in Guildford (10 miles east), Woking (12 miles north-east), Camberley (9 miles north), Frimley (8 miles north), Haslemere (9 miles south) and Cranleigh (14 miles east). Farnham ranks among the main centres of Surrey, with offices, shops, schools and other public and commercial buildings, and we cover them all.

What’s near Farnham

Around Farnham, our work takes us to commercial buildings near Moor Park, William Cobbett Public House and Weydon School. There’s a railway station in Farnham itself: Farnham station. A little further out are Museum of Farnham (less than half a mile north-west) and Farnham Castle (0.6 miles north-west). Open spaces near Farnham include Farnham Park and Aunt's Pool.

Map of Farnham © OpenStreetMap contributors

Quoting for work in Farnham

The price varies from site to site. Expect it to depend on:

  • Whether the work must be split into stages
  • Specialist products, such as fire-rated or hygienic sealants
  • Joint width, depth and condition
  • Removal of failed or old sealant

Cost follows what’s involved: stripping out, preparation, sealing, access and phasing. Call for a quote and we will explain how it’s made up.

Details that help us quote

We can often quote from photographs and a few details. It helps to include:

  • What the building is and how it’s used
  • Approximate linear metres or a joint schedule
  • Any dates the work must fit around
  • The product your specification calls for

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to phone 01277 525 020 or send details through our quote form with what you know.

Your questions answered

Can you work on a hospital site such as Farnham Community Hospital?

Yes, provided the work is planned with the site’s estates team. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

Will you plan work around the academic year at somewhere like University for the Creative Arts?

Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

Can staff carry on working while you’re here?

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

Can one quote cover more than one building?

Yes. We take on portfolio and planned maintenance work, with each site phased to suit its occupants.

Are you insured?

Yes. Our insurance certificate can be sent alongside the quote.

Do you provide access for facade work?

Access is planned with you before we quote. Let us know what access is in place or planned.

Who decides which product is used?

If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

How a job runs

Occupied buildings need a little choreography. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. For a town like Farnham, we try to group jobs for the same client into one visit. Tell us when the building is open and we’ll plan to suit.

  1. Access, site rules and timing are settled with the client up front.
  2. We only seal when joints are dry and within the product’s temperature range.
  3. Each joint is cut out and the edges inspected.
  4. Faces are cleaned, primed where needed and backed.
  5. Sealant is gunned in and tooled hard onto both faces.
  6. We hand over with our 12-month workmanship guarantee.

Getting the site ready

  • Let us know about inductions and permits
  • Explain the parking and delivery arrangements
  • Share the asbestos register for older buildings

Getting a fixed quote

Specifications, drawings and tender packages are welcome with any enquiry, and we will price the work to it. Smaller jobs need nothing more than photographs and a few notes.

Ask for a quote

Advice

Accreditations

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