Southampton · England
Sand mastic for sash & case windows in Freemantle, Southampton
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Freemantle. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Silicone on a period window that looks wrong
- Mastic round period door frames that has failed
- Patchy fillers round a sash window
What sand mastic looks like in Freemantle
Freemantle is within about 1 mile of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. With historic houses such as Southampton Tudor House and Garden (about 1.2 miles south-east) nearby, there’s older building stock in the area around Freemantle as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around Christ Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Millbrook (Hants) station? Then any sash windows need sound mastic to keep draughts and rain out.
Freemantle is about 1 mile west of Southampton, in Southampton. Freemantle gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 40 places across Southampton.
Jobs for sand mastic in SO15, SO16 and SO17 is quoted and booked the same way as anywhere else. Whether your property is on May Road, Park Road and Pitt Road or anywhere close by, we can help. Freemantle is on the A33, which makes it straightforward to reach. Other places close to Freemantle include Shirley (1 mile north), Regents Park (1 mile north-west), Millbrook (1 mile west), Maybush (2 miles north-west) and Coxford (2 miles north-west). We also work in nearby towns such as Townhill Park (3 miles north-east), Midanbury (3 miles east), Thornhill (4 miles east), Chartwell Green (4 miles east), Harefield (4 miles east) and Itchen (3 miles east).
What’s near Freemantle
We work in homes and buildings around St Anne's Catholic School, Blechynden Terrace Park and The Brass Monkey pub, among other places. Freemantle has its own railway station: Millbrook (Hants) station. Other landmarks nearby include Western Community Hospital (1.3 miles north-west) and Foresters Museum & Archive (within half a mile east). Open spaces near Freemantle include Testwood Lakes.
Sand mastic for homes and businesses in Freemantle
We work across Freemantle renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. We work on brick reveals, period & listed homes and tenement windows, and people most often call us about wind and rain getting in round a sash window and mastic round period door frames that has failed.
Homes around Freemantle range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
Every job is covered by a 12-month guarantee.
- Where
- Freemantle (SO15, SO16, SO17)
- Region
- Southampton
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
What happens on the day
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. Most jobs take anything from a few hours to a full day, depending on how many windows. A visit to Freemantle is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Clear the area around the work
- Mention if the joints have been sealed before
- Mention any tricky access
Getting a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Advice
Also near Freemantle
Also in Freemantle
Landlord and commercial work in Freemantle
We also work for property managers and facilities teams. Several sites can go on one quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Freemantle questions
Do you cover smaller places like Freemantle?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is sand mastic in a coastal place like Freemantle any different?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. The right product, a clean joint and the right depth all help it cope.
Can I do it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Are you insured?
Yes. We’re fully insured, with over 20 years’ experience in sealant work.
Can I paint the new mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Ask us before decorating.
Do I need to be at home?
If the work is inside, we need someone to let us in. After that, you can carry on with your day.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What do you need from me for a quote?
Only a few details: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or email us.
Should I try it myself first?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
What affects the cost of sand mastic
Every job gets its own quote. This is what makes a difference:
- Whether old sealant or filler has to be cut out
- The size of the job
- When we can work, for business premises
- How many rooms, windows or areas are involved
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.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- How we’d reach the joints
- Where the property is
- Roughly how big the job is
To get a quote, call 0345 464 0079 or drop us an email with the location and a short description of the problem. We will give you a clear quote before any work starts.
Common problems we fix in Freemantle
Timber frames move with the seasons. The movement cracks the mastic little by little.
If you can see any of these, it’s time to have the joints looked at:
- Draughty sash windows at the surround
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic worn away on windows facing the weather
- Gaps round a timber door in stone or brick
Schools such as Freemantle Church of England Community Academy are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Whether they’re fully insured
- How the surfaces are prepared before sealing
- How the colour is chosen
- Who does the work, and how experienced they are
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Sort the mastic before the decorators arrive
- Keep modern sealant off the mastic
- Avoid heavy scraping on the mastic joint
- Ask the planning authority about consent for listed or conservation-area homes
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
Surface by surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Period and listed homes
A traditional finish suits a period property, and sand mastic is one of them.