Hampshire · England
Eastleigh Sand Mastic
Sand mastic across Eastleigh and nearby, with old sealant always removed completely and a 12-month guarantee.
- Open joints round the window box
- Gaps round a timber door in stone or brick
- Patchy fillers round a sash window
Sand mastic for homes and businesses in Eastleigh
We work across Eastleigh 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, tenement windows and timber door frames, and people most often call us about cracked mastic round a front door frame and gaps between timber frames and stone or brick.
Walls in Eastleigh that face the prevailing wind take the most weather, and that is usually where the sealant gives up first. It’s worth looking at every frame, not just the one that leaks.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Sort the mastic before the decorators arrive
- Clear gutters so water does not pour onto the windows
- Ask a joiner to look at soft timber first
- Check the mastic when you check the paintwork
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Can I do it myself?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
Places near Eastleigh
Other services in Eastleigh
What happens if it’s left?
Not every draught comes from the sashes themselves. Gaps between the frame and the wall can be just as bad and new mastic seals them. Around Eastleigh, failed sealant lets water into hidden places, like the floor under a bath, the back of a panel or the inside of a wall. Whatever the joint, failed sealant only gets worse.
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we will explain the quote if you ask.
Why us?
- Trusted Arbo and Everbuild sealants
- Old sealant always removed completely
- We leave the area clean and tidy
- Rated 4.9 stars on Google
Take a look at how sealant jobs are priced or what customers say.
Frames and glazing around Eastleigh
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as South Stoneham House (about 2.5 miles south-west) nearby, there’s older building stock in the area around Eastleigh as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
Managing a site like Norwood Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Eastleigh station, older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as Church of the Resurrection, the joint between an old wall and a newer frame is usually the first place rain gets in.
Eastleigh is about 4 miles north-east of Southampton, in Hampshire. Anywhere in SO50, we cover sand mastic for homes and businesses. Across Hampshire, we cover 683 places, and Eastleigh is one of them.
Postcode districts we cover here for sand mastic: SO50, SO30, SO31 and SO19. Whether your property is on Market Street, High Street and Scotter Square or anywhere close by, our applicators can take on the job. Main roads around Eastleigh include the A335 and B3033. Nearby, we also carry out sand mastic in Bishopstoke (1 mile east), Boyatt Wood (1 mile north-west), Allbrook (2 miles north), Lord's Wood (2 miles north-east) and Highbridge (2 miles north). Within a short drive, we also cover Winchester (6 miles north), Gosport (14 miles south-east), Fareham (10 miles south-east), Horndean (15 miles east), Totton (8 miles south-west) and Hedge End (4 miles south-east). Eastleigh is among the bigger towns we cover in Hampshire.
Local landmarks in Eastleigh
Locally, jobs take us to homes and businesses close to The Wagon Works pub, Lakeside Country Park and Quilley School of Engineering. Eastleigh has its own railway station: Eastleigh station. A little further out are Moorgreen Hospital (2.9 miles south) and Eastleigh Museum (less than half a mile west). Green spaces nearby include Flexford Nature Reserve.
How the visit works
Good joint work is mostly preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to a full day, depending on how many windows. A visit in Eastleigh needs access to the work and a place to park close by. For outside work, let us know about side access, gates and any upper-floor joints.
- We look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Mention any tricky access
- Tell us about any previous sealing or DIY attempts
- Mention any sign-in or site rules at work premises
Get a quote
For a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You will have a clear quote before we start.
Related advice
What affects the quote in Eastleigh
The quote reflects the job in front of us. We take into account:
- Any working-time requirements on site
- The old material and how stubborn it is
- Access and height
- The number and length of the joints
Combining jobs into one visit usually makes better use of the time than several visits. You’ll get one clear quote for the whole job.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Photos by email, if that’s easy
- Whether it’s a home or a business
- Whether it has been sealed before
- How we’d reach the joints
We do not publish a price list, as no two jobs are quite the same. Instead, we give you a clear quote for your job. To get started, ring 0345 464 0079 or send us an email.
Common questions in Eastleigh
What guarantee comes with sand mastic in Eastleigh?
Every job comes with our one-year guarantee, wherever it is. We’re fully insured, and an ARBOMaster approved applicator.
Can you do sand mastic in Eastleigh?
Yes, Eastleigh is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They decide whether consent is needed.
Are you insured?
Yes, we are fully insured.
Can you quote for more than one area?
Of course. Doing several areas at once is usually more efficient, so mention them when you ask for a quote.
How long does sand mastic take to harden?
It skins over fairly quickly but takes longer to harden fully. We’ll explain what to expect before we leave.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we’ll give you a quote.
What the job involves on each surface
Stone surrounds
Stone surrounds suit sand mastic well. It finishes to look like part of the surround.
Timber door frames
Door frames get knocked and soaked, so their mastic can fail sooner. It’s renewed by hand.

