Slough · England
Sand Mastic in Farnham Common
Our applicators work in Farnham Common on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Mastic that needs renewing before redecorating
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
Farnham Common: your questions answered
Can you do sand mastic in Farnham Common?
Yes, Farnham Common is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
Will you come out to Farnham Common?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
What’s sand mastic made of?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and shaped to suit the surround.
What information do you need?
A short description and the location. If we need more, we’ll ask.
Where is Mr Mastic based?
We are a Crawley-based firm. Our area covers South East England, London and Scotland.
Can you seal over the old sealant?
No. The old sealant always comes out first.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Can old silicone round a sash window be swapped for sand mastic?
Often, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Sand mastic for homes and businesses in Farnham Common
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you are dealing with gaps where the frame meets the masonry and draughts and rain around sash boxes, we can help, on stone surrounds, tenement windows and sash and case windows alike.
Around Farnham Common, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
All our work comes with our one-year guarantee, wherever you are in Slough.
- Place
- Farnham Common (SL2)
- Wider area
- Slough
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Farnham Common
Also in Farnham Common
Why it’s worth doing now in Farnham Common
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. Where a wall is exposed, as many are in small places like Farnham Common, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before work begins, so you know where you stand.
Why us?
- We never seal over old sealant
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- 4.9 on Google from 180+ five-star reviews
Read our cost guide and customer reviews.
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- The product the joint needs
- When we can work, for business premises
- How much there is to do
- The old material and how stubborn it is
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all make a difference.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Where the job is, and your postcode
- How many joints, rooms or windows are involved
- How we’d reach the joints
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or email us.
Frames and glazing around Farnham Common
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Cliveden (about 3.3 miles west) nearby, there’s older building stock in the area around Farnham Common as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
For an older house near a landmark such as St John the Evangelist, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Rented homes near Burnham station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
Farnham Common is about 3 miles north of Slough, in Slough. Our applicators cover sand mastic for householders, landlords and businesses in Farnham Common and nearby, as part of our work across Slough. Farnham Common is one of 31 towns and villages in Slough we cover for sand mastic. For nearby work, see our Reading page.
We work across SL2 for sand mastic and the streets around it. We cover properties on Temple Way, Common Wood and Badgers Wood. If you are just outside Farnham Common, we cover Egypt (1 mile north-west), East Burnham (1 mile south-west), Hedgerley (1 mile north-east), Farnham Royal (1 mile south) and Littleworth Corner (2 miles west). Further out, we also cover Slough (3 miles south), Cippenham (3 miles south), Chalvey (4 miles south), Langley (4 miles south-east), Upton (4 miles south) and Burnham (3 miles south-west).
What’s near Farnham Common
Typical jobs here are in homes near The Royal Oak pub, Cocksherd Wood and Caldicott School and the streets around them. For rail, the closest station is Burnham station, roughly 2.9 miles south-west. Other landmarks nearby include Wexham Park Hospital (2.4 miles south-east). For a walk, there’s Burnham Beeches and Taplow Lake.
Landlords, agents and businesses in Farnham Common
Letting agents often deal with us directly. Tell us the address, the job and how access works.
Landlords and letting agents in Farnham Common can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for before the next move-in.
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours per window, depending on the condition of the joints. In a small place like Farnham Common, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Tell us if parking is tricky
- Keep pets and children clear of the area while we work
- Mention if the joints have been sealed before
How to get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Common problems we fix in Farnham Common
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Signs it’s time to call us include:
- Cracked mastic round a front door frame
- Failed mastic on an exposed elevation
- Draughty sash windows at the surround
- Modern sealant on a period surround
Managing a site like Farnham Common Junior School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- What the cure time is
- What the quote includes, VAT included or not
- Which sealant they’ll use, and why
- How the colour is chosen
Surface by surface
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. We rake it out and renew it.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
What we can’t put right
It helps to know what we cannot do too:
- Crumbling stone or brickwork round the window
- Sash cords, weights and draught-proofing of the sashes
- Whether work needs listed building consent
If in doubt, ring 0345 464 0079 or email us and we’ll say what we think.
Joints and surfaces we work on
- Sash and case windows
- Stone surrounds
- Timber door frames
- Brick reveals
- Period & listed homes
- Tenement windows