Southampton · England
Sand mastic for sash & case windows in Shirley, Southampton
Sand mastic for Shirley and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Modern sealant on a period surround
What we do, step by step
There’s no need to move everything out, just the space around the work. We protect the rest, and the job takes a few hours for a single window, longer for several for a typical job. For a job in Shirley, we agree the time, the access and parking before the day. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
- Tell us about any water getting in
Ask for a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or drop us an email.
Related advice
Sand mastic in Shirley
On many period windows, sand mastic looks right and suits the building. Newer frames usually get a flexible sealant instead, and we’ll talk through which suits your home. Typical jobs include old cement repairs round a window that have failed and gaps where the frame meets the masonry, on sash and case windows, timber door frames and period & listed homes.
Houses in smaller places like Shirley can stand more in the open than those in a built-up town, so exposed windows and doors face the weather head on. That is hard on the mastic around frames and sills.
A one-year guarantee comes as standard, so you’re not left on your own once the job is done.
- Place
- Shirley (SO15, SO16, SO17)
- Wider area
- Southampton
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Nearby places to Shirley
More services for Shirley
What sealant work can’t fix
Sealant is not the answer to every problem, and we’d rather say so up front. Sealant won’t put right:
- Cracked or broken glass
- Decisions on consent for listed homes
- Rotten sashes, sills or window boxes (a joiner’s job)
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly before you book.
Where we work in Shirley
- Timber door frames
- Period & listed homes
- Tenement windows
- Brick reveals
- Sash and case windows
- Stone surrounds
How to look after the new joints
A little care helps the new joints last. We recommend:
- Leave the new mastic unpainted
- Keep modern sealant off the mastic
- Plan mastic work ahead of painting
- Take care around the mastic when scraping paint
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
Can I do it myself?
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
What affects the cost of sand mastic
For a quick quote, just ask. The main things that affect it are:
- How many areas need sealing
- The product the joint needs
- Whether the work is at height
- The amount of work
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
Asking for a quote
There’s no need for technical detail. Just tell us:
- Whether it’s a home or a business
- Any previous sealing or DIY work
- A few photos by email, if you can
- Any access issues, like height or stairs
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll explain what’s involved before giving you a price.
Frames and glazing around Shirley
Shirley 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. That is hard on the mastic around older windows and doors, especially on the side facing the sea. 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 landlords with property near Millbrook (Hants) station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Shirley Parish Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Shirley is about 2 miles west of Southampton, in Southampton. Shirley gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 40 towns and villages across Southampton, from the larger towns to small villages.
All of SO15, SO16 and SO17 is covered for sand mastic. If you need sand mastic at a property on May Road, Dyer Road and York Road or anywhere close by, our applicators can take on the job. Being close to the A3057, Shirley is easy for our applicators to reach for sand mastic. We also cover the places around Shirley: Regents Park (1 mile west), Freemantle (1 mile south), Millbrook (1 mile south-west), Coxford (1 mile north-west) and Maybush (1 mile north-west). Larger places within reach include Townhill Park (3 miles east), Midanbury (3 miles east), Thornhill (4 miles east), Chartwell Green (4 miles east), Harefield (4 miles east) and Itchen (3 miles south-east). Being one of Southampton’s larger places, Shirley has homes, rented property and businesses of every kind.
Landmarks near Shirley
Locally, jobs take us to homes and businesses close to The Crown Public House, St James' Park and Regents Park Community College and the streets around them. The nearest railway station is Millbrook (Hants) station, about 0.7 miles south. A little further out are Netley Castle (4.4 miles south-east) and Foresters Museum & Archive (1 mile south-east). Green spaces nearby include Testwood Lakes.
Questions from Shirley
Is Shirley within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Do you work for landlords with property near Millbrook (Hants) station?
Yes, we work for landlords and agents. You can call 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Talk to us before any painting near it.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. Timing depends on the weather and the joint.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. The old sealant has to come out completely.
What sealant do you use?
Each joint gets the product that suits it. Movement, water and weather all affect the choice, and we will explain our choice.
Do I need permission for sand mastic on a listed building?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
When to call us in Shirley
Over the years, sand mastic weathers. It dries out, cracks and loses its grip on the stone or timber.
The problems people generally mention when they call include:
- Weathered mastic on the most exposed windows
- Mastic that needs renewing before redecorating
- Patchy fillers round a sash window
- Mastic round period door frames that has failed
If you look after a building such as Wordsworth Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Before you book anyone
- What guarantee comes with the work
- How the joint is cleaned and prepared
- Whether the sealant suits the joint
- Are they insured?
What the job involves on each surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.