Oxfordshire · England
Sand Mastic in Purley on Thames
Problem with your window and door surrounds in Purley on Thames? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
Sand mastic for homes and businesses in Purley on Thames
Silicone on a period window often looks wrong and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. We work on timber door frames, stone surrounds and sash and case windows, and people most often call us about mastic round period door frames that has failed and draughty sash windows at the surround.
In a smaller place like Purley on Thames, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
Big or small, it’s backed by our one-year guarantee.
- Location
- Purley on Thames (RG8, RG31, RG4)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Sand mastic in Purley on Thames: local notes
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. Historic houses like Mapledurham House (about 0.6 miles north-east) are a reminder that the area around Purley on Thames has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For site and facilities teams at buildings such as Purley CofE Primary School, larger buildings have plenty of frames, and the mastic around each one ages. For an older house near a landmark such as Church of St Mary, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Purley on Thames is about 3 miles west of Caversham, in Oxfordshire. Whether you are in the middle of Purley on Thames or further out, we cover sand mastic for every kind of property. Purley on Thames is one of 443 towns and villages in Oxfordshire where we work for sand mastic.
Every address in RG8, RG31 and RG4 is covered for sand mastic, from the main roads to the quietest streets. That includes homes and businesses on Glebe Road, Hazel Road and Menpes Road and the roads around them. Nearby, we also carry out sand mastic in Mapledurham (1 mile north-east), Tilehurst (1 mile south), Sulham (1 mile south-west), Little Heath (2 miles south) and Trench Green (2 miles north-east). Further out, we also cover Didcot (12 miles north-west), Henley-on-Thames (7 miles north-east), Benson (10 miles north), Wallingford (9 miles north-west), Great Western Park (13 miles north-west) and Watlington (11 miles north).
What’s near Purley on Thames
We work in homes and buildings around Denefield School, Round Copse and Roebuck pub. For rail, the closest station is Tilehurst station, about 1 mile south-east of the centre. Nearby you’ll also find Battle Hospital (2.6 miles south-east) and Royal Berkshire Regiment Museum (2.4 miles south-east). Not far away are Hosehill Lake and Moor Copse Nature Reserve.
Should I try it myself first?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it does not work out, we can still put it right.
If you’ve already had a go yourself, that’s fine. We cut it out and start again.
What we’re called out for in Purley on Thames
Water gets into small cracks in the mastic and loosens it further. Exposed elevations normally fail first.
Keep an eye out for these signs:
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
- Gaps round a timber door in stone or brick
Letting a property close to Tilehurst station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- How the surfaces are prepared before sealing
- Whether VAT is included
- What guarantee comes with the work
- Who does the work, and how experienced they are
Nearby places to Purley on Thames
Other services in Purley on Thames
Purley on Thames: your questions answered
Can you do sand mastic in Purley on Thames?
Yes. Our work covers London and the South East, and Purley on Thames is part of that. You can call 0345 464 0079 or drop us an email and tell us what needs doing, and we’ll give you a clear quote.
Do you work for landlords with property near Tilehurst station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or email us with the details for a clear quote.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Do I need to be at home?
We need access to the joints, so we will agree that with you when we book. Indoors, that normally means someone at home.
Do I need permission for sand mastic on a listed building?
It’s best to ask your local planning authority first. Sand mastic is often favoured as like for like, but they decide.
Where is Mr Mastic based?
Our base is Crawley. Our area covers South East England, London and Scotland.
Which is right for my windows, sand mastic or modern sealant?
We will talk it through with you. Period homes often look best with sand mastic and newer frames suit modern sealant.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and shaped to suit the surround.
Landlords, agents and businesses in Purley on Thames
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Look over the window mastic once a year
- Renew mastic before redecorating the windows
- Keep modern sealant off the mastic
- Leave the new mastic unpainted
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
The process
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work begins. The work generally takes anything from a few hours to a full day, depending on how many windows. For a job in Purley on Thames, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Mention any tricky access
- Clear items away from the joints we’re working on
How to get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Read more
Leave it or put it right?
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. Around Purley on Thames, water from a failed joint in an older home can soak into timber and plaster, and that’s a much bigger job than renewing the sealant.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will go through it with you.
What you get with us
- We leave the area clean and tidy
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- Old sealant always removed completely
See our cost guide and customer reviews.
How we quote for sand mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How easy the joints are to reach
- How many areas need sealing
- Any mould that needs treating
- How much old sealant there is and how hard it is to remove
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What to tell us for a quote
You do not need to know the technical terms. Just tell us:
- Roughly how big the job is
- Any access issues, like height or stairs
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or send us an email with the details, and photos are welcome.