West Berkshire · England
Penwood Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Penwood, backed by a 12-month guarantee. Ask us for a quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Old cement repairs round a window that have failed
- Modern sealant on a period surround
Landlord and commercial work in Penwood
For anyone letting property in or around Penwood, several properties can go on one quote. Send us the addresses and the work at each.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
About our sand mastic in Penwood
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Typical jobs include wind and rain getting in round a sash window and window mastic to renew ahead of painting, on stone surrounds, tenement windows and sash and case windows.
Mastic can only go onto a dry, clean joint, so window work in Penwood is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Big or small, you get the same one-year guarantee in Penwood and across West Berkshire.
- Location
- Penwood (RG20)
- Region
- West Berkshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we’re called out for in Penwood
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
The most common problems we see are:
- A silicone bead on a sash window that spoils the look
- Crumbling sand mastic round a window
- Patchy fillers round a sash window
- Tired mastic found when preparing windows for paint
For site and facilities teams at buildings such as Woolton Hill Junior School, larger buildings have plenty of frames, and the mastic around each one ages.
Comparing quotes
- How hidden problems are handled
- Whether the sealant suits the joint
- Whether you can choose the colour
- The length of the guarantee
What we can’t put right
A few problems are outside what sealant work can do:
- Planning or listed building consent (your local planning authority decides)
- Broken panes
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Where we work in Penwood
- Sash and case windows
- Tenement windows
- Brick reveals
- Period & listed homes
- Stone surrounds
- Timber door frames
Common questions in Penwood
Will you come out to Penwood?
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.
Can you help a landlord with a rental near Newbury station?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear quote.
Do you work for hotels and businesses?
Yes. We have worked for hotels, offices and other businesses and we are fully insured.
How long does the job take?
A typical job takes a few hours per window, depending on the condition of the joints, including the preparation. We will confirm how long when we quote.
Where is Mr Mastic based?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.
Can you replace silicone on a period window with sand mastic?
In most cases. We remove the silicone and clean the joint, then point it with sand mastic.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for listed or conservation-area properties.
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Look over the window mastic once a year
- Go gently near the mastic when preparing windows
- Have rotten timber repaired before new mastic goes in
- Clear gutters so water doesn’t pour onto the windows
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
What sand mastic looks like in Penwood
With historic houses such as Highclere Castle (about 1.7 miles south) nearby, there’s older building stock in the area around Penwood as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. The South East is one of the drier parts 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 Newbury station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as Church of St Michael Archangel, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Penwood is about 4 miles south-west of Newbury, in West Berkshire. We provide sand mastic to homes and businesses in Penwood and the surrounding area. Across West Berkshire, we cover 155 places, Penwood among them. Reading is on our list too, about 18 miles from Penwood.
Work in RG20 is quoted and booked the same way as anywhere else. Sand mastic is available to properties on Penwood Heights, Woodlands and Foxs Lane. Neighbouring places we cover for sand mastic include Woolton Hill (1 mile north-west), Highclere (1 mile south-west), Wash Water (1 mile north-east), Enborne Row (1 mile north) and Burghclere (2 miles east). We also work in nearby towns such as Newbury (4 miles north-east), Thatcham (6 miles north-east), Burghfield Common (13 miles east), Speenhamland (4 miles north-east), Hungerford (8 miles north-west) and Calcot (15 miles north-east).
Near you in Penwood
Around Penwood, our work takes us to homes and buildings near The Clere School. Penwood’s nearest station is Newbury station, about 3.7 miles north-east of the centre. Nearby you’ll also find Newbury Castle (3.5 miles north) and British Balloon Museum & Library Ltd (3.9 miles north-east). The countryside around Penwood includes Audrey's Meadow and Sidown Hill.
Why it’s worth doing now in Penwood
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in and new mastic seals them. In a small place like Penwood, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Leaving a failed joint usually makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Penwood
- We’re fully insured
- Quality sealants from Arbo and Everbuild
- Anti-fungal sanitary silicone in wet areas
- Homes, businesses and hotels
Read how sealant jobs are priced and our reviews.
What happens on the day
You don’t need to clear the whole room or building, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows for a typical job. For a village or hamlet like Penwood, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- 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.
- 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
- For business premises, tell us about site rules or sign-in
- Keep children and pets away from the work area
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
For sand mastic in Penwood, phone 0345 464 0079 or drop us an email. Tell us what the problem is and where, and we will agree the price before any work begins.
Related advice
How we quote for sand mastic
Every job gets its own quote. This is what makes a difference:
- How much old sealant there is and how hard it is to remove
- How much there is to do
- Any mould that needs treating
- Access and height
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll explain what it covers.
What to tell us for a quote
When you call or email, it’s useful to know:
- How many joints, rooms or windows are involved
- Any access issues, like height or stairs
- What’s wrong with the joints now
- The type of property
Need a quote? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear quote before we start.