Hampshire · England
Sand mastic for sash & case windows in Kitwood, Hampshire
Sand mastic across Kitwood and nearby, with old sealant always removed completely.
- Modern sealant on a period surround
- Gaps where the frame meets the masonry
- Failed mastic on an exposed elevation
For landlords and businesses
Letting agents often deal with us directly. Tell us the address, the job and how access works and we will give you a quote.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
About our sand mastic in Kitwood
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with cement or filler used on old window joints that has cracked and mastic worn away on windows facing the weather, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Kitwood is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
You get a 12-month guarantee, the same in Kitwood as everywhere else we work.
- Where
- Kitwood (SO24)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Different surfaces, different methods
Tenement and terrace windows
Tenements and terraces often have many sash windows with ageing mastic. We can do one window or several.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Also near Kitwood
Other services in Kitwood
When something else is needed
Before booking, it’s worth knowing the limits too:
- Broken panes
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or will not open
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Timber door frames
- Sash and case windows
- Tenement windows
- Stone surrounds
- Period & listed homes
- Brick reveals
Windows and doors in Kitwood
Historic houses like Bentworth Hall (about 3.8 miles north) are a reminder that the area around Kitwood has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For site and facilities teams at buildings such as Four Marks Church of England Primary School, the mastic around its windows and doors needs looking after like any other building’s.
Kitwood is about 5 miles south-west of Alton, in Hampshire. Whether you’re in the middle of Kitwood or further out, sand mastic is available for homes and businesses alike. Across Hampshire, we cover 683 places, and Kitwood is one of them. There’s also a page for Southampton, roughly 19 miles from Kitwood.
Here we cover the SO24 postcode area for sand mastic. We also cover the places around Kitwood: Gilbert Street (1 mile south-west), Charlwood (1 mile south-east), North Street (1 mile west), Monkwood (2 miles south) and Ropley (2 miles south-west). We also work in nearby towns such as Basingstoke (12 miles north), Winchester (12 miles west), Fleet (15 miles north-east), Horndean (13 miles south), Alton (5 miles north-east) and Waterlooville (14 miles south).
Landmarks near Kitwood
Well-known places in the area include Alton Community Hospital (4.1 miles north-east) and Barton Castle (4.3 miles north-west). Not far away are Shutts Copse and Red Hill.
What we are called out for in Kitwood
Shallow joints are a common cause. Mastic that is too thin cracks and drops out so we make sure the new mastic is the right thickness.
Any of these means the joints need attention:
- Silicone on a period window that looks wrong
- Old sand mastic that has cracked, crumbled or fallen out
- Draughty sash windows at the surround
- Failed mastic on an exposed elevation
For an older house near a landmark such as Church of the Good Shepherd, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- Whether they seal over old material or remove it
- Which colour the sealant will be
- How the joint is cleaned and prepared
- What product goes in the joint
How the visit works
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work starts. Most jobs take a few hours for a single window, longer for several. For a village or hamlet like Kitwood, 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Before we arrive
- Let us know if you’ve seen damp or leaks
- Clear items away from the joints we are working on
- For indoor joints, keep the area dry beforehand if you can
Get a quote
There’s no standard price list, because every job is different. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or send us an email.
Read more
Your questions about sand mastic in Kitwood
Do you cover Kitwood for sand mastic?
Yes. We work across London and the South East, and Kitwood is part of that. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear price.
Do you cover smaller places like Kitwood?
Yes, we do. 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.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. We use products from Arbo and Everbuild.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in.
Is it messy?
We keep the work tidy. We protect what’s around the joints.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
When will the new mastic be hard?
It takes a while. The skin forms first, and the full set comes later, and we’ll tell you what to expect.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Looking after it afterwards
Good habits help new joints last longer. A few tips:
- Sort the mastic before the decorators arrive
- Avoid heavy scraping on the mastic joint
- Keep modern sealant off the mastic
- Get any rot dealt with first
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.
Can I do it myself?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.