Hampshire · England
Sand mastic for sash & case windows in Penton Corner, Hampshire
Our applicators work in Penton Corner on traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Window mastic to renew ahead of painting
- Mastic worn away on windows facing the weather
- Gaps where the frame meets the masonry
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t run silicone over sand mastic
- Leave the new mastic unpainted
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid heavy scraping on the mastic joint
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
About our sand mastic in Penton Corner
For a listed home or one in a conservation area, ask 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 period & listed homes, sash and case windows and stone surrounds, and people most often call us about a silicone bead on a sash window that spoils the look and mastic that needs renewing before redecorating.
Homes in small places like Penton Corner often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Each job carries a 12-month guarantee.
- Where
- Penton Corner (SP11)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Penton Corner
What else we do in Penton Corner
What we’re called out for in Penton Corner
Previous repairs in cement or silicone often trap water or crack away. They don’t move with the timber, and they generally need raking out.
It’s worth asking for a quote if you see:
- Cracked mastic round a front door frame
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
Homes close to Holy Trinity Church include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What to look for in a quote
- What happens if the job turns out different
- Is VAT in the price?
- Whether they’re fully insured
- The length of the guarantee
Why deal with it now?
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. In a small place like Penton Corner, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we will explain the quote if you ask.
Why choose Mr Mastic in Penton Corner
- Tidy, careful work
- Anti-fungal silicone where joints get wet
- We never seal over old sealant
- Over 20 years’ experience
See our cost guide or customer reviews.
Surface by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Period and listed homes
Many older homes were built with sand mastic round the windows. If your home is listed, ask your local planning authority about consent.
What sand mastic looks like in Penton Corner
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Portway Junior School, its window and door frames need their mastic kept sound, just like a home’s. If you let a flat or house near Andover station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Penton Corner is about 2 miles west of Andover, in Hampshire. Jobs in Penton Corner get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Penton Corner is one of 683 places in Hampshire where we work for sand mastic. Our Southampton page covers work nearby.
Our applicators cover all of SP11 for sand mastic. You’ll find streets such as Short Lane and Beech Close, all of which we cover. Other places close to Penton Corner include Penton Grafton (1 mile north), Penton Mewsey (1 mile north), Red Post Bridge (1 mile south), Foxcotte (1 mile north-east) and Charlton (1 mile east). Further out, we also cover Winchester (14 miles south-east), Romsey (15 miles south), Hyde (14 miles south-east), Tidworth (6 miles west), Weeke (13 miles south-east) and Stanmore (14 miles south-east).
Landmarks near Penton Corner
Around Penton Corner, our work takes us to homes and buildings near Harrow Way Community School and White Hart Public House and the streets around them. The closest station to Penton Corner is Andover station, roughly 1.6 miles east. Well-known places in the area include Andover Museum (2.3 miles east) and Andover War Memorial Hospital (1.5 miles east). Not far away are Quarley Hill and Anton Lakes.
What we cannot put right
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Crumbling stone or brickwork round the window
- Sash cords, weights and draught-proofing of the sashes
- Timber that has rotted
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
What we seal
- Period & listed homes
- Stone surrounds
- Tenement windows
- Sash and case windows
- Brick reveals
- Timber door frames
How it works
There’s no need to move everything out, just the space around the work. We protect the rest, and the work takes a few hours for a single window, longer for several for a typical job. For a village or hamlet like Penton Corner, 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic is not too thick.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Try not to wet indoor joints just before the visit
- Tell us if parking is tricky
- Mention any sign-in or site rules at work premises
Get a quote
For sand mastic in Penton Corner, ring 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
Read more
Your questions about sand mastic in Penton Corner
Is Penton Corner within the area you cover?
Yes, Penton Corner is covered. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Penton Corner?
Yes, Penton Corner is within the area we cover. Our work covers London and the South East. Just ring 0345 464 0079 or drop us an email with a few details of the job, and we will send you a clear quote.
When will the new mastic be hard?
The surface skins quite quickly and it hardens fully over a longer time. The weather and joint depth both affect it.
Can I paint the new mastic?
Sand mastic is normally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Do you take out the old sealant first?
Yes, every time. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. Indoors, that usually means someone at home.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Are you insured?
Yes, we are fully insured.
What affects the cost of sand mastic
Every job gets its own quote. These are the things that affect it:
- How many rooms, windows or areas are involved
- Access and height
- Whether old sealant or filler has to be cut out
- Any mould that needs treating
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, phone 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
What to tell us when you ask for a quote:
- If it’s domestic, commercial or a hotel
- Where the property is
- Pictures of the joints, sent by email
- If someone has resealed it before
We quote each job on its own. Simply ring 0345 464 0079 or send us an email and describe the job and send pictures if you have them.