Mastic sealing for building owners and managing agents in Farnham, Surrey
Mastic sealing in Farnham, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.
- Water getting in round frames after rain
- Mastic failing across several blocks on an estate
- Repeated reactive repairs to the same buildings
Mastic sealing across Farnham
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Should maintenance staff do it?
Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
General builders and handymen seal joints, but it isn’t their main trade. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.
About our mastic sealing in Farnham
Across Farnham and the rest of Surrey, we work the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Addresses, photos of typical joints and a rough idea of quantities let us give a quick quote or we can visit. The enquiries we see most involve worn sealant at communal door frames and window mastic that has split and shrunk, across external wall and movement joints, balcony and threshold joints and window and door perimeters on blocks. Whoever orders the work in Farnham, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.
Older buildings in towns like Farnham have often had replacement windows fitted at different times, which leaves perimeter mastic of very different ages. A look at the whole building shows which joints need doing now.
We stand by our work: 12 months, guaranteed. That covers our preparation and application.
- Location
- Farnham (GU9, GU10)
- Region
- Surrey
- Cover
- 12 months on our workmanship
- Price
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
On site: what to expect
Occupied buildings need a little choreography. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. For a town like Farnham, we try to group jobs for the same client into one visit. Give us your access times and we will fit the work in.
- We inspect each building and record the joints that have failed.
- You get a fixed quote, per block or for the whole programme.
- Dates and areas are agreed so occupiers can be told.
- Failed sealant is removed and the faces prepared.
- New sealant goes in with backing rod and primer where needed.
- We check the finished work and confirm the guarantee.
Getting the site ready
- Agree which areas must stay open
- Explain the parking and delivery arrangements
- Let building users know which areas are affected
Request a quote
Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to speak to us on 01277 525 020 or send details through our quote form.
Related advice
Frames, entrances and external joints in Farnham
Farnham is about 36 miles from central London. Commuter-belt towns tend to have plenty of managed blocks near stations and town centres; their frame mastic often ages block-wide. There are two care or nursing homes within about 2 miles of Farnham. Owners of care premises can bring window and door mastic into a phased programme planned around the home.
Site managers at schools like Farnham College can fit frame mastic into the summer works. Churches, halls and community buildings such as St Joan of Arc's Church are looked after by trustees and committees like any other owner, and their frames, doors and external joints need mastic renewed in time. For owners of several units at places like Hookstile Trading Estate (under half a mile south-west of Farnham), one programme can deal with frame and external mastic across the lot.
Farnham is about 6 miles south of Farnborough, in Surrey. Any commercial site in Farnham is covered, for single jobs and planned programmes alike. Across Surrey, 379 places are covered, Farnham among them. We also cover Reading, some 18 miles away.
We take on mastic joints across the GU9 and GU10 postcode area. Among the streets we cover are Barncroft, Approach Road and Saxon Croft. Being close to the A31 and A287, Farnham is easy to get to with materials and equipment. We also cover Compton (1 mile east), Hale (1 mile north), Upper Hale (2 miles north), Runfold (2 miles east) and Heath End (2 miles north) for mastic joints. Nearby towns on our patch include 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.
Around Farnham
We work on buildings around Moor Park, William Cobbett Public House and Weydon School and the streets around them. There’s a railway station in Farnham itself: Farnham station. Other landmarks nearby include Museum of Farnham (under half a mile north-west) and Farnham Castle (0.6 miles north-west). The countryside around Farnham includes Farnham Park and Aunt's Pool.
When something else is needed
Not every problem is a sealant problem, and we’d rather tell you before you spend money. These need a different solution:
- Failed window or door frames, which need a window contractor
- Cracked or crumbling render, brick or stone at the joint edges (we will tell you if so)
- Leaks from above rather than through a joint
If you are not sure, just phone 01277 525 020 or use the quote form and we’ll give you a straight answer.
Joints and surfaces we work on
- Communal entrances and stairwells
- External wall and movement joints
- Shopfronts below residential blocks
- Balcony and threshold joints
- Communal kitchens and washrooms
- Window and door perimeters on blocks
Cost factors for mastic joints
What shapes the price:
- Joint width, depth and condition
- Working within restricted access windows
- How much there is to seal
- Distance, for remote addresses
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
Details that help us quote
Good information means a firmer quote. Helpful details to send:
- The type of building and who uses it
- Whether an asbestos survey exists
- How the joints are reached, and at what height
- Specification clauses that apply
A good quote starts with a clear picture: what’s there, how much of it, how we reach it and what’s specified. Send what you have, and we will arrange a site visit if anything is unclear.
Common questions from Farnham clients
Is Hookstile Trading Estate, near Farnham, within your area?
Yes, sites like Hookstile Trading Estate are within our area, along with the rest of Farnham. Photos and a short description are enough for a first look.
Will you take on a block within reach of Farnham station?
Yes, and several blocks can go on one quote. Photos of each elevation help us quote accurately.
How long do sealant joints last?
It depends on movement, UV and weather, cleaning, traffic and the product. Sealant joints are maintenance items, so inspect them regularly.
Do you work for managing agents and housing associations?
Yes, that’s exactly who this service is for. Buildings are scheduled in turn with dates agreed in advance.
Is it fine to apply new sealant on top of old?
No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.
Do you cover Farnham?
Yes. Sites across Farnham are covered, with one number for every area we cover.
How long does a job like this take?
That varies with the scale of the job, but the work typically takes a day or two for a single block, longer for an estate programme. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.
Keeping the joints sound
Every sealant joint needs some looking after, and how long they last depends on how they’re treated. Our advice:
- Share the asbestos register when you send details
- Ask residents or tenants to report leaks and draughts early
- Log resealing dates block by block
- Share your contractor requirements early
Our workmanship is covered for 12 months, so report any failure in that time. After that, regular inspection keeps the programme on track.
Mastic fails gradually, then all at once in a wet spell. Resealing when cracking first shows avoids water damage and saves internal repairs.
For managing agents and facilities managers
FMs need a contractor who is easy to get on site. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
CHAS accredited and a Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.