Hampshire · England
Sand Mastic in Aldershot
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Aldershot, backed by a one-year guarantee. Call for a quick quote.
- Mastic dropping out of the joint
- Mastic round period door frames that has failed
- Modern sealant on a period surround
What we can’t put right
To be straight with you, some problems need a different trade:
- Sashes that rattle, stick or won’t open
- Timber that has rotted
- Crumbling stone or brickwork round the window
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
What we seal
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
- Stone surrounds
- Period & listed homes
How we handle sand mastic in Aldershot
We work across Aldershot renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on period & listed homes, tenement windows and brick reveals, and the jobs we see most are mastic worn away on windows facing the weather and silicone on a period window that looks wrong.
Plenty of homes in a town like Aldershot have had conservatories, patio doors or new windows added over the years. Every addition brings more joints, each wearing at its own pace. Sills, frame heads and glazing joints are where leaks usually start.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Where
- Aldershot (GU11, GU12)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
DIY versus a professional finish
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, 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.
Questions from Aldershot
Can you help a landlord with a rental near Aldershot station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just phone 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll give you a clear quote.
Is sand mastic in Aldershot guaranteed?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
What do you need from me for a quote?
Tell us what needs doing and where, with photos by email if possible. We’ll ask anything else we need to know.
Where do you work from?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Is it worth trying it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Can old silicone round a sash window be swapped for sand mastic?
Normally, yes. Once the silicone is out and the joint prepared we point it with sand mastic.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We’ll tell you what to expect for your job.
Can you match the sealant colour?
Usually, yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before work begins.
How it works
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a single window, longer for several and we leave things clean and tidy. A visit in Aldershot needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Mention any leaks or damp you’ve noticed
- Keep pets and children clear of the area while we work
Ask for a quote
We quote each job on its own, so the first step is telling us about yours. Just call 0345 464 0079 or email us with the details.
Related advice
Other services in Aldershot
What sand mastic looks like in Aldershot
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 Farnham Castle (about 2.7 miles south-west) are a reminder that the area around Aldershot has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Talavera Junior School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Church of the Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Aldershot is about 8 miles west of Guildford, in Hampshire. Anywhere in GU11, we cover sand mastic for homes and businesses. Our Hampshire coverage runs to 683 places, and Aldershot is one of them. For nearby work, see our Reading page.
All of GU11 and GU12 is covered for sand mastic, from the main roads to the quietest streets. Local streets include Station Road, East Station Road and High Street, all of which we cover. Being close to the A323 and A325, Aldershot is easy for our applicators to reach. Other places close to Aldershot include Weybourne (1 mile south-west), Badshot Lea (1 mile south), Heath End (1 mile south-west), Tongham (1 mile south-east) and Hale (2 miles south-west). Further out, we also cover Basingstoke (15 miles west), Farnborough (3 miles north), Fleet (4 miles north-west), Alton (11 miles south-west), Yateley (7 miles north-west) and Bordon (10 miles south-west).
Near you in Aldershot
We work in homes and buildings around All Hallows Catholic School, Prince Consort's Library and Princes Gardens. Aldershot has its own railway station: Aldershot station. Nearby you’ll also find Royal Army Dental Corps Historical Museum (1.6 miles north) and Farnham Castle (2.7 miles south-west). Green spaces nearby include Claycart Hill and Rowhill Nature Reserve.
Looking after it afterwards
To keep the joints looking good and working properly:
- Do not paint over the new mastic
- Renew mastic before redecorating the windows
- Have rotten timber repaired before new mastic goes in
- Ask the planning authority about consent for listed or conservation-area homes
Avoid painting over the new mastic, as traditional guidance advises. Ask us before any decorating around it.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Surface by surface
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Period and listed homes
A traditional finish suits a period property.
What we’re called out for in Aldershot
Some old mastic was never deep enough. Mastic that is too thin cracks and drops out, which is why we pack deep voids first and get the depth right.
People normally contact us after spotting something like this:
- Old sand mastic that has cracked, crumbled or fallen out
- Tired mastic found when preparing windows for paint
- Patchy fillers round a sash window
- Modern sealant on a period surround
Rented homes near Aldershot station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Whether VAT is included
- What happens if the job turns out different
- When the joint can take water or movement
- Who turns up on the day
How we quote for sand mastic
You will get a clear quote before work begins. It takes into account:
- Which sealant suits the joint
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You’ll get one clear quote for the whole job.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- A few photos by email, if you can
- What’s wrong with the joints now
- The type of property
- Roughly how big the job is
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.