West Berkshire · England
Newtown Common Sand Mastic
Problem with your window and door surrounds in Newtown Common? We remove the old material, prepare the joints and seal them properly.
- A silicone bead on a sash window that spoils the look
- Open joints round the window box
- Draughts and rain around sash boxes
How we handle sand mastic in Newtown Common
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. We work on brick reveals, sash and case windows and period & listed homes, and the jobs we see most are mastic round period door frames that has failed and patchy fillers round a sash window.
Homes in small places like Newtown Common often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, it’s backed by our one-year guarantee.
- Where
- Newtown Common (RG20)
- Wider area
- West Berkshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around Newtown Common
Historic houses like Highclere Castle (about 3.1 miles south-west) are a reminder that the area around Newtown Common has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of St Mary and St John the Baptist, the joint between an old wall and a newer frame is usually the first place rain gets in. If you let a flat or house near Newbury station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you look after a building such as Horris Hill School, larger buildings have plenty of frames, and the mastic around each one ages.
Newtown Common is about 2 miles south of Newbury, in West Berkshire. If you need sand mastic in Newtown Common, it’s easy to get a quote: please phone 0345 464 0079 or send us an email. We cover West Berkshire from our Crawley base. Newtown Common is one of 155 towns and villages in West Berkshire where we work for sand mastic. Our Reading page covers work nearby.
Here we cover the RG20 postcode area for sand mastic. If you are just outside Newtown Common, we cover Burghclere Common (1 mile south), Earlstone Common (1 mile south), Sandleford (1 mile north-east), Wash Common (1 mile north-west) and Wash Water (1 mile west). Within a short drive, we also cover Thatcham (4 miles north-east), Burghfield Common (12 miles east), Speenhamland (3 miles north), Hungerford (9 miles west), Calcot (13 miles north-east) and Lambourn (13 miles north-west).
What’s near Newtown Common
Typical jobs here are in homes near Park House School and Sandleford Priory. Newtown Common’s nearest station is Newbury station, roughly 2.2 miles north of the centre. A little further out are Old Chapel Textile Centre (2.1 miles east) and West Berkshire Community Hospital (3.1 miles north-east). The countryside around Newtown Common includes Beacon Hill and Audrey's Meadow.
For landlords and businesses
Landlords and letting agents in Newtown Common can book us as well as homeowners. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Leave it or put it right?
New sash windows are a major, costly change and on a listed home, consent may be needed. Where the frames are in good order, new mastic seals the surround. Around Newtown Common, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Combining jobs into one visit usually makes better use of the time than several visits. We will give you a clear price for the lot.
Why choose Mr Mastic in Newtown Common
- Old sealant always removed completely
- Homes, businesses and hotels
- Over 20 years’ experience
- Anti-fungal silicone where joints get wet
See our cost guide or what customers say.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Keep sills and gutters clear so water drains away
- Leave the new mastic unpainted
- Take care around the mastic when scraping paint
- Check with your local planning authority if your home is listed
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Should I try it myself first?
If you’re 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.
The biggest DIY mistake is sealing over old sealant. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
When something else is needed
Before you book, it’s worth knowing the limits:
- Sashes that need overhauling
- Timber that has rotted
- Cracked or broken glass
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think.
Surfaces we seal
- Timber door frames
- Brick reveals
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
What affects the cost of sand mastic
We quote each job individually. This is what makes a difference:
- The number and length of the joints
- Which sealant suits the joint
- Whether the work is at height
- Whether old sealant or filler has to be cut out
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. We give a clear quote before work begins.
Asking for a quote
Photos help, but a description is a good start. Please mention:
- Access, such as stairs, a lift or height
- Any previous sealing or DIY work
- The address or postcode of the job
- How many joints, rooms or windows are involved
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved and give you a clear price.
Common questions in Newtown Common
Can you do sand mastic in Newtown Common?
Yes. Our work covers London and the South East, and Newtown Common is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear price.
Will you come out to Newtown Common?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do I need to be at home?
It depends on the job. Inside work needs someone to give us access.
Can you replace silicone on a period window with sand mastic?
Yes. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Is the work guaranteed?
There’s a 12-month guarantee on every job.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We will tell you what to expect for your job.
Are you fully insured?
Yes, we’re fully insured.
Will the old sealant be removed?
Yes, every time. New sealant will not bond properly to old, so the joint is cleaned back first.
What we do, step by step
We keep the work tidy and contained to the area we are working on. The job normally takes a few hours for a single window, longer for several, and we tell you how long to leave it before we go. In a small place like Newtown Common, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- 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.
Before we arrive
- Let us know about parking restrictions
- Keep children and pets away from the work area
- Clear the area around the work
Getting a quote
There’s no standard price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or drop us an email.