Hampshire · England
Sand Mastic in Medstead
Window and door surrounds in Medstead need attention? We remove the old material, prepare the joints and seal them properly, with a 12-month guarantee.
- Mastic dropping out of the joint
- Draughty sash windows at the surround
- Open joints round the window box
Medstead: your questions answered
I let a flat near Alton station. Can you help?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Do you cover smaller places like Medstead?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Are you fully insured?
Yes, we are fully insured for every job we do.
How long does sand mastic take to harden?
It takes a while. The skin forms first, and the full set comes later, and we’ll tell you what to expect.
Can I do it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. If it does not work out, we can redo it.
Is there any odour?
It depends on the product. Some products have a noticeable smell, others very little.
Sand mastic for homes and businesses in Medstead
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. Common call-outs are for modern sealant on a period surround and mastic dropping out of the joint, across period & listed homes, sash and case windows and timber door frames.
Homes around Medstead range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Medstead (GU34)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What sand mastic looks like in Medstead
Historic houses like Bentworth Hall (about 2.1 miles north) are a reminder that the area around Medstead 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. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For landlords with property near Alton station, older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like Medstead Church of England Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Medstead is about 4 miles south-west of Alton, in Hampshire. Whether you’re in the middle of Medstead or further out, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Medstead is one of 683 places in Hampshire where we work for sand mastic. You can also see our page for Southampton, about 20 miles away.
Work in GU34 works the same way as everywhere else we cover. Streets in the area include High Street, Five Ash Road and Stoney Lane, and we cover them all. We also cover Four Marks (1 mile south), South Town (1 mile north-west), Soldridge (1 mile south-west), New Copse (1 mile north) and Hattingley (2 miles north-west). Further out, we also cover Basingstoke (10 miles north), Winchester (12 miles west), Fleet (14 miles north-east), Horndean (15 miles south), Alton (4 miles north-east) and Petersfield (9 miles south-east).
Landmarks near Medstead
The closest station to Medstead is Alton station, roughly 4.4 miles north-east. Well-known places in the area include Barton Castle (3 miles north-west) and Alton Community Hospital (3.1 miles north-east). Not far away are Red Hill.
Work for landlords, hotels and businesses
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can be quoted together.
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Keep modern sealant off the mastic
- Check the mastic when you check the paintwork
- Take care around the mastic when scraping paint
- Have rotten timber repaired before new mastic goes in
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
Nearby places to Medstead
Also in Medstead
What happens if it’s left?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic won’t stop the gaps and traditional guidance is to leave the new mastic unpainted. In a smaller place like Medstead, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
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 play a part, and we’ll explain the quote if you ask.
What you get with us
- We never seal over old sealant
- A 12-month guarantee on all work
- We are fully insured
- We leave the area clean and tidy
Do you need sand mastic in Medstead?
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows.
Signs it’s time to call us include:
- Draughts and rain around sash boxes
- Modern sealant on a period surround
- Open joints round the window box
- Old cement repairs round a window that have failed
If you live in an older home near Church of the Good Shepherd, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Before you book anyone
- How hidden problems are handled
- How the joint is cleaned and prepared
- What product goes in the joint
- Whether they’re fully insured
What affects the quote in Medstead
The price is agreed before any work begins. It’s based on:
- How many areas need sealing
- How easy the joints are to reach
- Any working-time requirements on site
- The old material and how stubborn it is
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
What we need to know
To make quoting easier, please include:
- If it’s domestic, commercial or a hotel
- How we’d reach the joints
- Where the job is, and your postcode
- Photos by email, if that is easy
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
The process
Before we leave, we go over the finished joints with you and explain the cure time. The visit itself usually takes a few hours for a single window, longer for several, depending on how much there is to do. A visit to Medstead is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Before we arrive
- Tell us about any previous sealing or DIY attempts
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.