West Berkshire · England
Swallowfield Sand Mastic
Problem with your window and door surrounds in Swallowfield? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Cracked mastic round a front door frame
- Failed mastic on an exposed elevation
- Wind and rain getting in round a sash window
Sand mastic in Swallowfield
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 and built up by hand. On period homes, it looks right where silicone wouldn’t. If you have a silicone bead on a sash window that spoils the look and tired mastic found when preparing windows for paint, we can help.
Around Swallowfield, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Swallowfield (RG7)
- Wider area
- West Berkshire
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of sand mastic
Jobs vary more than people expect. The main factors:
- The number and length of the joints
- The number of rooms or windows
- The product the joint needs
- Whether the work is at height
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Any previous sealing or DIY work
- Roughly how big the job is
- Any access issues, like height or stairs
- Whether it’s a home or a business
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll explain what’s involved and give you a clear price.
Also near Swallowfield
Other services in Swallowfield
Sand mastic in Swallowfield: local notes
With historic houses such as Stratfield Saye House (about 2.6 miles south-west) nearby, there’s older building stock in the area around Swallowfield as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Letting a property close to Mortimer station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of All Saints include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Swallowfield is about 5 miles south of Reading, in West Berkshire. From the centre of Swallowfield to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Swallowfield is one of 155 towns and villages in West Berkshire where we work for sand mastic.
Work in RG7 is quoted and booked the same way as anywhere else. Streets in the area include The Street, Hornbeams and Fieldfare Court, and we cover them all. If you are just outside Swallowfield, we cover Riseley (1 mile south), Spencers Wood (1 mile north), Beech Hill (2 miles west), Farley Hill (2 miles east) and Grazeley (2 miles north-west). Within a short drive, we also cover Thatcham (13 miles west), Burghfield Common (5 miles west), Calcot (6 miles north-west), Shaw (15 miles west), Burghfield Hill (4 miles west) and Theale (6 miles north-west).
What’s near Swallowfield
Locally, jobs take us to homes and businesses close to Oakbank, Swallowfield Meadow and The Crown pub. The closest station to Swallowfield is Mortimer station, roughly 3.3 miles west. Well-known places in the area include Beaumys Castle (0.9 miles west) and Royal Berkshire Hospital (5 miles north). For a walk, there’s The Marshes Local Nature Reserve and Longwater.
Different surfaces, different methods
Timber door frames
Doors face weather and wear and the mastic can crack early. It’s renewed by hand.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
What we’re called out for in Swallowfield
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
Common reasons people contact us are:
- Gaps round a timber door in stone or brick
- Cement or filler used on old window joints that has cracked
- Wind and rain getting in round a sash window
- Window mastic to renew ahead of painting
For site and facilities teams at buildings such as Lambs Lane Primary School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- Which sealant they’ll use, and why
- Is VAT in the price?
- What happens if the job turns out different
- Is the old sealant removed completely?
What we do, step by step
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. Somewhere as small as Swallowfield, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- We apply the mastic by hand and shape it.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- For business premises, tell us about site rules or sign-in
- Move anything stored near the joints
Get a quote
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
Read more
Landlords, agents and businesses in Swallowfield
We work for landlords and agents as well as homeowners. Resealing between tenancies keeps a property looking cared for before the next move-in.
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we’ll quote.
Why deal with it now?
Replacing sash windows is a big decision for a period home and on a listed home, consent may be needed. If the frames are sound, renewing the mastic deals with gaps and draughts at the surround. Older cottages and farmhouses around Swallowfield can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re unsure, call 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Swallowfield
- ARBOMaster approved applicator
- Trusted Arbo and Everbuild sealants
- Experience in homes, commercial sites and hotels
- More than 20 years in sealant work
Read our cost guide or customer reviews.
Can I do it myself?
Some sealant jobs are within reach of a careful DIYer, 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.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Questions from Swallowfield
Will you come out to Swallowfield?
Yes, Swallowfield is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you help a landlord with a rental near Mortimer station?
Yes, we work for landlords and agents. You can phone 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Do the sealants smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
How long does the job take?
It depends on the size of the job, but as a guide it takes a few hours for a single window, longer for several. We’ll tell you when we quote.
Should I use sand mastic or silicone?
That depends on your windows. Period windows in stone or brick normally suit sand mastic and newer frames usually get a flexible sealant.
What is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Ask us before decorating.