Hampshire · England
Sand mastic for sash & case windows in Lee-on-the-Solent, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Lee-on-the-Solent. Fully insured, ARBOMaster approved and guaranteed for a year.
- Gaps where the frame meets the masonry
- Mastic dropping out of the joint
- Gaps round a timber door in stone or brick
Sand mastic in Lee-on-the-Solent, done properly
We renew sand mastic around sash windows and doors in stone and brick. Out comes the old, loose mastic, and new mastic is applied and shaped by hand. Common call-outs are for failed mastic on an exposed elevation and crumbling sand mastic round a window, on timber door frames, sash and case windows and stone surrounds.
Homes around Lee-on-the-Solent 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.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Where
- Lee-on-the-Solent (PO13)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
It helps to know what we cannot do:
- Putty and glazing repairs
- Crumbling stone or brickwork round the window
- Rotten sashes, sills or window boxes (a joiner’s job)
If in doubt, call 0345 464 0079 or email us and we will say what we think before booking.
Surfaces we seal
- Stone surrounds
- Period & listed homes
- Brick reveals
- Tenement windows
- Sash and case windows
- Timber door frames
FAQs for Lee-on-the-Solent
Does living near the coast affect sand mastic in Lee-on-the-Solent?
Near the sea, outside joints face more wind, rain and salt than they would inland, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Will you come out to Lee-on-the-Solent?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Can I add another job to the visit?
Yes, we can. Several rooms, windows or areas can go on one quote.
Is it possible to paint over sand mastic?
It’s traditionally left unpainted, as guidance on traditional windows advises. Talk to us before any painting near it.
Do you remove the old sealant?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
How long does sand mastic take to go off?
It skins over fairly quickly but takes longer to harden fully. We’ll tell you what to expect for your job.
What happens if it’s left?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic suits the building and finishes neatly against the masonry. In a smaller place like Lee-on-the-Solent, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
What it costs depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. We give a clear quote before we start.
Why choose Mr Mastic in Lee-on-the-Solent
- Approved under the ARBOMaster scheme
- Arbo and Everbuild products
- Homes, businesses and hotels
- More than 20 years in sealant work
See our cost guide or customer reviews.
Landlords, agents and businesses in Lee-on-the-Solent
If you manage several properties in or around Lee-on-the-Solent, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
What sand mastic looks like in Lee-on-the-Solent
Lee-on-the-Solent 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 is hard on the mastic around older windows and doors, especially on the side facing the sea. The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as Lee-On-the-Solent Infant and Nursery School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Church of St Faith include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Lee-on-the-Solent is about 2 miles west of Gosport, in Hampshire. Our applicators cover sand mastic for homes and businesses in Lee-on-the-Solent and nearby, as part of our work across Hampshire. We cover 683 towns and villages across Hampshire, large and small.
We work across PO13 for sand mastic and the streets around it. We cover properties on High Street, Victoria Square and Wheatcroft Road. Close by, we work in Crofton (1 mile north), Peel Common (1 mile north), Rowner (2 miles north-east), Bridgemary (2 miles north-east) and Gosport (2 miles east). Further out, we also cover Havant (10 miles north-east), Eastleigh (13 miles north-west), Fareham (3 miles north), Horndean (11 miles north-east), Chandler's Ford (15 miles north-west) and Hedge End (9 miles north-west).
Near you in Lee-on-the-Solent
We work in homes and buildings around Crofton School and Baycroft School and the streets around them. The nearest railway station is Fareham station, roughly 3.5 miles north. A little further out are Fareham Shopping Centre (3.6 miles north) and Gosport War Memorial Hospital (2.1 miles east). The countryside around Lee-on-the-Solent includes West of the River Alver.
How we quote for sand mastic
We do not publish a price list, because no two jobs are the same. What we look at:
- The product the joint needs
- Access and height
- Working hours on commercial sites
- How many areas need sealing
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Asking for a quote
When you call or email, these details help:
- If it’s domestic, commercial or a hotel
- Where the property is
- The problem you’ve noticed
- Whether it has been sealed before
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.
How it works
All our tools and materials come with us in the van, so there’s nothing for you to buy. Once we have agreed what’s being done, the area is protected and the work begins. Most jobs take a few hours per window, depending on the condition of the joints. A visit to Lee-on-the-Solent is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any parking rules near the property
- Tell us about any water getting in
- For indoor joints, keep the area dry beforehand if you can
Ask for a quote
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Read more
Places near Lee-on-the-Solent
Other services in Lee-on-the-Solent
Signs you need sand mastic in Lee-on-the-Solent
Water gets into small cracks in the mastic and loosens it further. Exposed elevations normally fail first.
Most people get in touch after spotting something like this:
- Cement or filler used on old window joints that has cracked
- Mastic dropping out of the joint
- Silicone on a period window that looks wrong
- Mastic round period door frames that has failed
Letting a property close to Fareham station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Before booking anyone
- How much experience the applicator has
- How long to leave it before use
- Whether they’re fully insured
- What guarantee comes with the work
DIY sealant or a professional job?
If you do try it yourself, take your time over the 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.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.