Hampshire · England
Sand mastic for sash & case windows in Hillhead, Hampshire
Professional sand mastic in and around Hillhead, with every bit of old sealant taken out first and a 12-month guarantee.
- Cracked mastic round a front door frame
- Tired mastic found when preparing windows for paint
- Mastic dropping out of the joint
Sand mastic in Hillhead, done properly
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you’re dealing with patchy fillers round a sash window and modern sealant on a period surround, we can help, whatever the surface.
Around Hillhead, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a one-year guarantee.
- Where
- Hillhead (SO45)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Different surfaces, different methods
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Places near Hillhead
Also in Hillhead
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
What we’re called out for in Hillhead
Previous repairs in cement or silicone often trap water or crack away. They don’t suit the joint, and they normally need raking out.
Look out for any of the following:
- Mastic dropping out of the joint
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
- Gaps where the frame meets the masonry
If you live in an older home near St George, the joint between an old wall and a newer frame is generally the first place rain gets in.
What your quote should include
- What the cure time is
- How the surfaces are prepared before sealing
- Whether they seal over old material or remove it
- Which colour the sealant will be
Hillhead: your questions answered
Will you come out to Hillhead?
Yes. Hillhead is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Can you help a landlord with a rental near Hamble station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll send you a clear quote.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
Should I try DIY first?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. If you are redecorating the window, ask us first and we’ll advise.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Movement, water and weather all affect the choice.
Do you have insurance?
Yes. We’re fully insured.
Will there be a smell?
Some sealants have a smell while they cure, which fades as it sets. Ventilation helps.
What sand mastic looks like in Hillhead
Hillhead is within about 1 mile of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. Both are hard on the mastic around older windows and doors, which can dry out and crack sooner where a building faces the weather. Historic houses like Osborne House (about 4.7 miles south-east) are a reminder that the area around Hillhead has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Hamble station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Hillhead is about 4 miles north of Cowes, in Hampshire. Wherever you are in the SO45 postcode area, we can carry out sand mastic at your property. Our area takes in 683 places across Hampshire. You can also see our page for Southampton, roughly 8 miles from Hillhead.
All of SO45 is covered for sand mastic, from the main roads to the quietest streets. Neighbouring places we cover for sand mastic include Calshot (1 mile north-west), Sprat's Down (1 mile west), Stanswood (1 mile south-west), Stonehills (1 mile north-west) and Ashlett (1 mile north-west). Within a short drive, we also cover Gosport (7 miles east), Havant (15 miles east), Eastleigh (11 miles north), Fareham (6 miles north-east), Horndean (15 miles north-east) and Totton (11 miles north-west).
Near you in Hillhead
For rail, the closest station is Hamble station, roughly 4.3 miles north of the centre. A little further out are Sir Max Aitken Museum (3.3 miles south) and Calshot Castle (1 mile north-east). Not far away are Mercury Marshes and Mill Hill.
What we cannot put right
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Damaged stone surrounds
- Decisions on consent for listed homes
- Decayed frames that need repair
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before you book.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
What we do, step by step
There is not much for you to do on the day. Point us to the joints and we’ll get on with it. The work itself takes a few hours for a single window, longer for several. For a village or hamlet like Hillhead, 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 look at the surrounds with you and agree what needs doing.
- Old, loose 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 finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- Mention any parking rules near the property
- Clear the area around the work
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
Related advice
Looking after it afterwards
How long the joints last depends on use and care. We suggest:
- Ask the planning authority about consent for listed or conservation-area homes
- Take care around the mastic when scraping paint
- Keep sills and gutters clear so water drains away
- Look over the window mastic once a year
Do not touch or press the mastic while it hardens. It skins over quickly but needs longer to fully harden.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
For landlords and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.