Slough · England
Farnham Royal Sand Mastic
Our applicators work in Farnham Royal on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Old cement repairs round a window that have failed
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
Sand mastic in Farnham Royal
Sand mastic doesn’t last for ever, leaving gaps round the window. We rake it out and renew it and tidies the surround. Typical jobs include draughty sash windows at the surround and mastic worn away on windows facing the weather, on sash and case windows, period & listed homes and tenement windows.
In a village or hamlet like Farnham Royal, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
A 12-month guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Farnham Royal (SL2)
- Wider area
- Slough
- Guarantee
- One year on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Do you need sand mastic in Farnham Royal?
Timber swells and shrinks with the weather. That movement opens up the mastic joint little by little.
People usually contact us after spotting one of these:
- Open joints round the window box
- Silicone on a period window that looks wrong
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
If you look after a building such as St Mary's Farnham Royal CofE Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Before booking anyone
- How hidden problems are handled
- Who turns up on the day
- Whether all the old sealant comes out first
- What the quote includes, VAT included or not
What we can’t put right
Before you book, it’s worth knowing the limits:
- Crumbling stone or brickwork round the window
- Broken panes
- Sash cords, weights and draught-proofing of the sashes
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before booking.
What we seal
- Brick reveals
- Timber door frames
- Period & listed homes
- Sash and case windows
- Tenement windows
- Stone surrounds
Farnham Royal homes and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Cliveden (about 3.3 miles west) are a reminder that the area around Farnham Royal has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Mary, the joint between an old wall and a newer frame is usually the first place rain gets in. For landlords with property near Burnham station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Farnham Royal is about 2 miles north of Slough, in Slough. If you need sand mastic in Farnham Royal, it’s easy to get a quote: please ring 0345 464 0079 or email us. We are based in Crawley and cover Slough, Farnham Royal included. Across Slough, we cover 31 places, and Farnham Royal is one of them. You can also see our page for Reading, about 17 miles away.
Every address in SL2 is covered for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Church Road, Sospel Court and Montague Close. Other places close to Farnham Royal include Britwell (1 mile south-west), East Burnham (1 mile north-west), Farnham Common (1 mile north), Egypt (1 mile north) and Slough (2 miles south). Within a short drive, we also cover Langley (4 miles south-east), Upton (3 miles south-east), Datchet (4 miles south-east), Ditton (4 miles south-east), Poyle (6 miles south-east) and Colnbrook (6 miles south-east).
Around Farnham Royal
Around Farnham Royal, our work takes us to homes and buildings near The Crown Public House, Cocksherd Wood and Caldicott School and the streets around them. The nearest railway station is Burnham station, about 1.8 miles south-west of the centre. Nearby you’ll also find Wexham Park Hospital (1.8 miles east) and Windsor Castle (4 miles south). The countryside around Farnham Royal includes Burnham Beeches and Taplow Lake.
Farnham Royal: your questions answered
I let a flat near Burnham station. Can you help?
Yes. We work for landlords and agents as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will send you a clear quote.
Can you do sand mastic in Farnham Royal?
Yes. We work across London and the South East, and Farnham Royal is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job, and we will send you a clear quote.
Can you do several jobs on one visit?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
Do you do commercial work?
Yes. We have worked for hotels, offices and other businesses.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, chosen to suit the joint. We explain the product when we quote.
When will the new mastic be hard?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
A careful DIYer can reseal a simple joint, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What the job involves on each surface
Period and listed homes
Materials matter on listed and conservation-area homes. Like-for-like sand mastic is normally favoured.
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. The gap round it is pointed with sand mastic.
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. Older cottages and farmhouses around Farnham Royal can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in Farnham Royal
- Arbo and Everbuild products
- Full insurance on every job
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
See what affects the cost and what customers say.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- The number and length of the joints
- The old material and how stubborn it is
- Any mould that needs treating
- How many rooms, windows or areas are involved
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- Whether it’s a home or a business
- Whether it has been sealed before
- Any access issues, like height or stairs
- The rough size of the job
It all starts with a short chat. Describe the problem, the location and the size of the job, and we’ll explain how we’d tackle it. Whenever you’re ready, ring 0345 464 0079 or drop us an email.
How it works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. All told, the work takes anything from a few hours to a full day, depending on how many windows. In a small place like Farnham Royal, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic isn’t too thick.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Tell us if parking is tricky
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Get a quote
We do not publish a price list. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.