Hampshire · England
Sand mastic for sash & case windows in Hungerford, Hampshire
Sand mastic for Hungerford, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- A silicone bead on a sash window that spoils the look
- Mastic round period door frames that has failed
- Old cement repairs round a window that have failed
DIY versus a professional finish
A careful DIYer can reseal a simple joint, 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.
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Sand mastic in Hungerford
A silicone bead around a sash window can look out of place and doesn’t suit the building. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. If you are dealing with open joints round the window box and mastic round period door frames that has failed, we can help.
Mastic can only go onto a dry, clean joint, so window work in Hungerford is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Each job carries a 12-month guarantee, large or small.
- Where
- Hungerford (SP6)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Hungerford
Also in Hungerford
How we quote for sand mastic
Your quote is based on your job. We look at:
- Mould in or behind the old joints
- How many areas need sealing
- The size of the job
- Any working-time requirements on site
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
What we need to know
To help us quote quickly, please include:
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- Access, such as stairs, a lift or height
- Pictures of the joints, sent by email
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
How the job changes by surface
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We work on single windows or whole elevations.
Timber door frames
Sand mastic is used round timber door frames too. We renew it the same way as on windows.
When to call us in Hungerford
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
Look out for these signs:
- Gaps between timber frames and stone or brick
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
- Gaps round a timber door in stone or brick
Schools such as Hyde Church of England Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Questions to ask before you book
- Whether they’re fully insured
- Whether you can choose the colour
- How long the guarantee is
- Whether they seal over old material or remove it
How the visit works
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes anything from a few hours to a full day, depending on how many windows. In a small place like Hungerford, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
How to prepare
- Tell us about any previous sealing or DIY attempts
- Let us know about stairs, lifts or work at height
- Mention any leaks or damp you’ve noticed
How to get a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job and send pictures if you have them.
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Common questions in Hungerford
What guarantee comes with sand mastic in Hungerford?
All our work, in Hungerford and everywhere else, comes with a 12-month guarantee. We’re fully insured, and an ARBOMaster approved applicator.
Do you cover smaller places like Hungerford?
Yes. Hungerford is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Where is Mr Mastic based?
We are based in Crawley, and we work across South East England, London and Scotland.
How long does sand mastic take to go off?
A skin forms quite soon, but full hardening takes longer. We’ll explain what to expect before we leave.
What is sand mastic?
It’s sand mixed with a linseed-oil-based binder for the joint between timber frames and masonry.
Are you fully insured?
Yes. We’re fully insured, and we’ve been doing sealant work for more than 20 years.
Will there be a smell?
That depends on the sealant. Some products have a noticeable smell, others very little.
Can landlords and businesses book you?
Yes. We work for householders, landlords, letting agents, businesses and hotels in Hungerford.
What we cannot put right
Some problems need a builder, plumber or other trade rather than us:
- Sashes that rattle, stick or will not open
- Crumbling stone or brickwork round the window
- Cracked or broken glass
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Brick reveals
- Stone surrounds
- Period & listed homes
- Tenement windows
Frames and glazing around Hungerford
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Breamore House (about 4.3 miles north) are a reminder that the area around Hungerford 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.
For an older house near a landmark such as Church of the Holy Ascension, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Hungerford is in Hampshire. Across the SP6 area, our applicators can take on sand mastic. Hungerford is one of 683 towns and villages in Hampshire we cover for sand mastic. There’s also a page for Southampton, roughly 16 miles from Hungerford.
Work in SP6 works the same way as everywhere else we cover. Neighbouring places we cover for sand mastic include Hyde (1 mile east), North Gorley (1 mile south-west), Frogham (1 mile north-east), Stuckton (1 mile north-west) and Blissford (1 mile north-east). Larger places within reach include Totton (11 miles east), Lymington (14 miles south-east), Romsey (14 miles north-east), New Milton (12 miles south-east), Ringwood (4 miles south) and Barton on Sea (12 miles south).
Local landmarks in Hungerford
In Hungerford, that means homes and buildings near The Burgate School and Sixth Form and the streets around them. A little further out are Godshill Castle Hill (2.4 miles north) and Fordingbridge Doll Museum (1.6 miles north-west). Green spaces nearby include Linbrook Lake and Blashford Lakes.
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Make sure water runs off the sill
- Check with your local planning authority if your home is listed
- Have rotten timber repaired before new mastic goes in
- Avoid heavy scraping on the mastic joint
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.