Hampshire · England
Gundleton Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Gundleton and across Hampshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Modern sealant on a period surround
Different surfaces, different methods
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. If your home is listed, ask your local planning authority about consent.
Sash and case windows
The mastic round a sash window is on show so we finish it carefully.
About our sand mastic in Gundleton
Silicone on a period window often looks wrong and is not always the right material. Sand mastic is the traditional choice and we can swap the silicone for it. If you have old sand mastic that has cracked, crumbled or fallen out and mastic worn away on windows facing the weather, we can put it right.
Outdoor sealant needs dry, clean surfaces, so work on frames around Gundleton is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- Gundleton (SO24)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the quote in Gundleton
Every job gets its own quote. These are the things that affect it:
- The number of rooms or windows
- Whether there’s mould to deal with
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
Asking for a quote
You don’t need to know the technical terms. Just tell us:
- If it’s domestic, commercial or a hotel
- The problem you’ve noticed
- Where the property is
- Any previous sealing or DIY work
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 and send you a clear quote.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic matches what was there, which can matter on listed and conservation-area homes. In a small place like Gundleton, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Why book with us
- Every job guaranteed for a year
- Full insurance on every job
- Neat joints and a tidy finish
- Any old sealant cut out fully, not covered over
Take a look at how sealant jobs are priced and what customers say.
For landlords and businesses
Mouldy or split sealant often shows up at the end of a tenancy. Several properties can go on one quote.
Landlords and agents in Gundleton can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Signs you need sand mastic in Gundleton
Sand mastic slowly weathers. It dries out, cracks and loses its grip from the frame or the masonry.
Keep an eye out for these signs:
- Old cement repairs round a window that have failed
- A silicone bead on a sash window that spoils the look
- Cracked mastic round a front door frame
- Weathered mastic on the most exposed windows
For an older house near a landmark such as Church of All Saints, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
What to look for in a quote
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- Which colour the sealant will be
- How the joint is cleaned and prepared
When something else is needed
It helps to know what we cannot do:
- Timber that has rotted
- Broken panes
- Crumbling stone or brickwork round the window
Not sure which it is? You can phone 0345 464 0079 or email us and we will tell you honestly.
Where we work in Gundleton
- Tenement windows
- Brick reveals
- Timber door frames
- Period & listed homes
- Sash and case windows
- Stone surrounds
Common questions in Gundleton
Is there a guarantee on sand mastic in Gundleton?
Every job comes with our 12-month guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Is Gundleton in your area for sand mastic?
Yes. Our work covers London and the South East, and Gundleton is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Are you fully insured?
Yes. We are fully insured for every job we do.
Is there any odour?
Sometimes, a little. It fades as the sealant cures.
How much does sand mastic cost in Gundleton?
Every job is different, so each one gets its own quote. To get one, call 0345 464 0079 or drop us an email with a short description of the job.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
Is consent needed for window work on a listed home?
Checking first is sensible. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
What we do, step by step
On the day, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before we start. Most jobs take a few hours per window, depending on the condition of the joints. For a village or hamlet like Gundleton, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Preparing for the visit
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
- Try not to wet indoor joints just before the visit
Get a quote
Asking for a quote is easy: let us know the job and the location and its rough size. A few pictures by email make the job easier to understand, and we will take it from there.
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Also near Gundleton
Also in Gundleton
Gundleton homes and the weather
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Hinton Ampner House (about 4 miles south) nearby, there’s older building stock in the area around Gundleton as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Perins School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Gundleton is about 7 miles south-west of Alton, in Hampshire. Our applicators cover sand mastic for homes and businesses in Gundleton, as part of our work across Hampshire. Our area takes in 683 places across Hampshire, large and small. Southampton is on our list too, around 17 miles away.
Postcode districts we cover here for sand mastic: SO24. If you need sand mastic at a property on Goscombs Lane and Bighton Lane or a nearby road, our applicators can take on the job. We also cover the places around Gundleton: Bishop's Sutton (1 mile south-west), New Alresford (2 miles west), Bramdean (3 miles south), Hinton Ampner (4 miles south) and Cheriton (4 miles south-west). Larger places within reach include Basingstoke (12 miles north), Winchester (9 miles west), Eastleigh (13 miles south-west), Horndean (14 miles south), Chandler's Ford (14 miles south-west) and Alton (7 miles north-east).
Around Gundleton
Locally, jobs take us to homes and businesses close to Three Horseshoes Public House, among other places. Other landmarks nearby include Barton Castle (2.9 miles north). Not far away are Shutts Copse and Red Hill.