Hampshire · England
Sand Mastic in Worthy Down
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Worthy Down. Fully insured, ARBOMaster approved and guaranteed for a year.
- Silicone on a period window that looks wrong
- Gaps between timber frames and stone or brick
- Draughty sash windows at the surround
About our sand mastic in Worthy Down
Traditional burnt sand mastic that sits naturally against stone and brick. It’s a good fit for period properties, where modern sealant can look out of place. If you have weathered mastic on the most exposed windows and old sand mastic that has cracked, crumbled or fallen out, we can help, on period & listed homes, timber door frames and tenement windows alike.
Homes in small places like Worthy Down often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
The work is covered for a year after we finish. If there’s a problem with it, please ring 0345 464 0079 or email us.
- Where
- Worthy Down (SO21)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
The process
You don’t need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere as small as Worthy Down, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Mention any sign-in or site rules at work premises
- Let us know about parking restrictions
- Clear items away from the joints we’re working on
Get a quote
We quote each job on its own, so the first step is telling us about yours. Just phone 0345 464 0079 or drop us an email with the details.
Read more
How to look after the new joints
Good habits help new joints last longer. Our tips:
- Do not run silicone over sand mastic
- Inspect the joints round the windows every year or so
- Go gently near the mastic when preparing windows
- Plan mastic work ahead of painting
Avoid painting over the new mastic, as traditional guidance advises. If you’re redecorating, ask us first.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
FAQs for Worthy Down
Is Worthy Down within the area you cover?
Yes, Worthy Down is covered. We work across 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 help a landlord with a rental near Winchester station?
Yes, we work for letting agents and landlords. Just call 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
What do you need from me for a quote?
A short description and the location, plus photos if you have them. We’ll ask anything else we need to know.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
What exactly is sand mastic?
It’s the traditional filler for the joint round timber windows and doors. It combines sand with a linseed-oil-based binder.
Do you have insurance?
Yes. We are fully insured.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Do you work for hotels and businesses?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Quotes for sand mastic in Worthy Down
Call for a quick quote. The main things that affect it are:
- How much old sealant there is and how hard it is to remove
- How many areas need sealing
- When we can work, for business premises
- The type of sealant required
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- What the problem is, such as mould, gaps, leaks or cracking
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- Any previous sealing or DIY work
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 pictures by email if you can.
Why deal with it now?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. Older cottages and farmhouses around Worthy Down can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Ask us for a quote and we will explain what it covers.
Why book with us
- We leave the area clean and tidy
- We’re fully insured
- A 12-month guarantee on all work
- Sanitary silicone with an anti-fungal additive in wet areas
Read our cost guide or what customers say.
Should I try it myself first?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
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.
What sealant work cannot fix
We will always be straight with you, so here’s what sealant can’t fix:
- Sashes that rattle, stick or will not open
- Planning or listed building consent (your local planning authority decides)
- Damaged stone surrounds
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
Where we work in Worthy Down
- Brick reveals
- Timber door frames
- Tenement windows
- Stone surrounds
- Period & listed homes
- Sash and case windows
Signs you need sand mastic in Worthy Down
Rain on the window surround works into any crack and pushes it out. Exposed elevations normally fail first.
The problems people usually mention when they call are:
- A silicone bead on a sash window that spoils the look
- Old cement repairs round a window that have failed
- Old sand mastic that has cracked, crumbled or fallen out
- Failed mastic on an exposed elevation
For site and facilities teams at buildings such as South Wonston Primary School, the mastic around its windows and doors needs looking after like any other building’s.
What to look for in a quote
- Whether you can choose the colour
- What product goes in the joint
- Whether they’re fully insured
- How long to leave it before use
Also near Worthy Down
What else we do in Worthy Down
Worthy Down homes and the weather
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.
If you let a flat or house near Winchester station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to St Margaret's include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Worthy Down is about 4 miles north of Winchester, in Hampshire. For sand mastic in and around Worthy Down, please ring 0345 464 0079 or send us an email for a quick quote. We cover Hampshire from our Crawley base, Worthy Down included. 683 places in Hampshire are on our list, from the larger towns to small villages. There’s also a page for Southampton, roughly 14 miles from Worthy Down.
Jobs for sand mastic in SO21 works the same way as everywhere else we cover. Local streets include Coopers Close, Coate Drive and Wellesley Drive, and we cover them all. Close by, we work in South Wonston (1 mile north), Springvale (2 miles south-east), Crawley (3 miles west), Sutton Scotney (3 miles north) and Stoke Charity (3 miles north-east). Within a short drive, we also cover Basingstoke (15 miles north-east), Winchester (4 miles south), Eastleigh (10 miles south), Andover (9 miles north-west), Totton (15 miles south-west) and Chandler's Ford (9 miles south).
What’s near Worthy Down
Typical jobs here are in homes near Henry Beaufort School. Worthy Down’s nearest station is Winchester station, roughly 3.2 miles south of the centre. A little further out are Royal Hampshire County Hospital (3.5 miles south) and Royal Observer Corps Museum (2.7 miles south-east). For a walk, there’s Winnall Moors.