Hampshire · England
Waltham Chase Sand Mastic
We cover Waltham Chase for traditional burnt sand mastic around sash and case windows and doors in stone and brick. Old sealant removed completely, joints prepared properly.
- Crumbling sand mastic round a window
- A silicone bead on a sash window that spoils the look
- Gaps where the frame meets the masonry
Keeping the joints in good condition
Aftercare is simple:
- Take care around the mastic when scraping paint
- Avoid patching sand mastic with silicone
- Look over the window mastic once a year
- Do not paint over the new mastic
Look at the mastic when you look over the windows. Catching cracks early keeps repairs small.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Sand mastic in Waltham Chase, done properly
Across Waltham Chase, we renew sand mastic around sash and case windows. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We’re often asked to deal with gaps between timber frames and stone or brick and draughty sash windows at the surround, on sash and case windows, timber door frames and tenement windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Waltham Chase is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
A one-year guarantee comes with the work, just as it does everywhere we cover.
- Where
- Waltham Chase (SO32)
- Region
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for sand mastic
You will get a clear quote before we start. It takes into account:
- Whether old sealant or filler has to be cut out
- When we can work, for business premises
- The type of sealant required
- Mould in or behind the old joints
What you pay reflects the work, not a rough estimate. That’s why we ask a few questions first.
Asking for a quote
To make quoting easier, please include:
- Whether it has been sealed before
- How many joints, rooms or windows are involved
- What the problem is, such as mould, gaps, leaks or cracking
- The address or postcode of the job
We quote each job on its own, so start by telling us what you need. Simply phone 0345 464 0079 or drop us an email and describe the job, and pictures are welcome.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
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 doesn’t work out, we can still put it right.
FAQs for Waltham Chase
Is Waltham Chase within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Botley station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear quote.
Should I use sand mastic or silicone?
Sand mastic generally suits period timber windows best. On modern frames, we’d normally use a flexible sealant.
Which products do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Is there any odour?
There can be a smell while the sealant cures, which fades as it sets. Opening a window helps.
Can old silicone round a sash window be swapped for sand mastic?
Often, yes. Once the silicone is out and the joint prepared, sand mastic is applied by hand.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like, but they decide.
Can you seal over the old sealant?
No. We remove every bit of old sealant first, so the new joint bonds to clean surfaces.
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, carry out the job and tidy away. Most jobs take anything from a few hours to a full day, depending on how many windows. For a village or hamlet like Waltham Chase, the journey is planned in advance: let us know about lanes, gates and parking. 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.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
For sand mastic in Waltham Chase, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Read more
Sand mastic in Waltham Chase: local notes
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you look after a building such as St John the Baptist Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s. In the older streets around Waltham Chase Methodist Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. For landlords with property near Botley station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Waltham Chase is about 5 miles east of Hedge End, in Hampshire. From the centre of Waltham Chase to the outskirts, sand mastic is available for homes and businesses alike. Our area takes in 683 places across Hampshire. There’s also a page for Southampton, about 8 miles away.
Work in SO32 works the same way as everywhere else we cover. Whether your property is on Chase Grove, Club House Lane and Sandy Hill Close or anywhere close by, we can help. Close by, we work in Bishop's Waltham (2 miles north), Curdridge (2 miles south-west), Ashton (3 miles north), Durley Street (3 miles north-west) and Durley (3 miles west). Larger places within reach include Winchester (10 miles north-west), Gosport (9 miles south), Havant (11 miles south-east), Eastleigh (7 miles west), Fareham (6 miles south) and Horndean (9 miles east).
Near you in Waltham Chase
Typical jobs here are in homes near The Black Dog pub and Swanmore College of Technology. For rail, the closest station is Botley station, roughly 2.7 miles south-west. Well-known places in the area include Bishop's Waltham Museum (1.4 miles north-west) and Knowle Hospital (3.7 miles south). Open spaces near Waltham Chase include Bishops Waltham Branch LNR.
Why act early in Waltham Chase
A silicone bead can be quicker, but on period stone or brick it often looks out of place. Sand mastic is the traditional material and finishes neatly against the masonry. Where a wall is exposed, as many are in small places like Waltham Chase, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A few things move the cost up or down: 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.
What you get with us
- Neat joints and a tidy finish
- 180+ five-star Google reviews
- Approved under the ARBOMaster scheme
- More than 20 years in sealant work
Take a look at our cost guide or our reviews.
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Sashes that rattle, stick or won’t open
- Cracked or broken glass
- Crumbling stone or brickwork round the window
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Where we work in Waltham Chase
- Stone surrounds
- Brick reveals
- Tenement windows
- Timber door frames
- Period & listed homes
- Sash and case windows
Different surfaces, different methods
Tenement and terrace windows
Upper-floor windows need access planning. Let us know the floor and we will confirm access.
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.