Hampshire · England
Sand mastic for sash & case windows in Over Wallop, Hampshire
Specialist sand mastic for Over Wallop: careful preparation, the right product and tidy work. Ask us for a quick quote.
- Wind and rain getting in round a sash window
- Cement or filler used on old window joints that has cracked
- Old sand mastic that has cracked, crumbled or fallen out
About our sand mastic in Over Wallop
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it so the surround looks right again. If you are dealing with old cement repairs round a window that have failed and wind and rain getting in round a sash window, we can put it right, whatever the surface.
In a village or hamlet like Over Wallop, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If something isn’t right with it in that time, tell us and we’ll put it right.
- Location
- Over Wallop (SO20)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Your questions about sand mastic in Over Wallop
Is Over Wallop within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is Over Wallop in your area for sand mastic?
Yes, Over Wallop is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or email us with a few details of the job, and we will send you a clear quote.
What do you need from me for a quote?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
How long does sand mastic take to harden?
Not straight away. It skins first and hardens fully later and we’ll give you an idea for your job.
Are you fully insured?
Yes. We’re fully insured.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
What guarantee comes with the work?
Our 12-month guarantee applies on every job.
Where do you work from?
We’re a Crawley-based firm. Our area covers South East England, London and Scotland.
Sand mastic in Over Wallop: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For landlords with property near Grateley station, any sash windows need sound mastic to keep draughts and rain out. Managing a site like Wallop Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Over Wallop is about 7 miles south-west of Andover, in Hampshire. Wherever you are in the SO20 postcode area, we can carry out sand mastic at your property. Our area takes in 683 places across Hampshire, large and small. Our Southampton page covers work nearby.
We work across the SO20 postcode area for sand mastic. Streets in the area include Station Road, King Lane and King Lane Cottages. Neighbouring places we cover for sand mastic include Middle Wallop (1 mile south-east), Kentsboro (2 miles north-east), Nether Wallop (2 miles south-east), Fox (3 miles north) and Amport (4 miles north). Within a short drive, we also cover Winchester (13 miles south-east), Andover (7 miles north-east), Chandler's Ford (14 miles south-east), Romsey (12 miles south-east), Hyde (13 miles south-east) and Tidworth (7 miles north-west).
Local landmarks in Over Wallop
Typical jobs here are in homes near The White Hart Inn. For rail, the closest station is Grateley station, about 2 miles north-west. Open spaces near Over Wallop include Winterbourne Downs RSPB reserve and Quarley Hill.
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Ask the planning authority about consent for listed or conservation-area homes
- Don’t paint over the new mastic
- Look over the window mastic once a year
- Avoid patching sand mastic with silicone
Keep paint scrapers and sanders off the mastic when redecorating. Hard scraping can loosen it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Places near Over Wallop
More services for Over Wallop
What we do, step by step
On the day, we start by going over the job with you. Surfaces next to the work are protected before work begins. The work usually takes a few hours per window, depending on the condition of the joints. Somewhere as small as Over Wallop, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
Ask for a quote
For a quote, call 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Related advice
Surface by surface
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. We rake it out and renew it.
Landlords, agents and businesses in Over Wallop
We regularly work with letting and managing agents. Tell us the address, the job and how access works.
From a single let to a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
Can I do it myself?
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.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
How we quote for sand mastic
You will get a clear quote before we start. It takes into account:
- Whether there’s mould to deal with
- Any working-time requirements on site
- How much old sealant there is and how hard it is to remove
- The type of sealant required
What you pay reflects the work, not a rough estimate. That’s why we ask about the job first and give you a clear price before any work starts.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- Where the property is
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Whether it has been sealed before
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. Whenever you are ready, ring 0345 464 0079 or email us.
When to call us in Over Wallop
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
Common reasons people contact us are:
- Gaps between timber frames and stone or brick
- A silicone bead on a sash window that spoils the look
- Weathered mastic on the most exposed windows
- Draughty sash windows at the surround
For an older house near a landmark such as Church of St Peter, the joint between an old wall and a newer frame is normally the first place rain gets in.
Before booking anyone
- Which colour the sealant will be
- Is the old sealant removed completely?
- Which sealant they’ll use, and why
- When the joint can take water or movement