Southampton · England
Window & door mastic in Shirley, Southampton
Window mastic across Shirley and nearby, with old sealant always removed completely.
- Gaps left after new windows were fitted
- Hard, cracked sealant around windows
- Whistling draughts around closed windows
Window mastic for homes and businesses in Shirley
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. If you are dealing with leaking joints at the ends of sills and mastic that’s falling out in pieces, we can put it right, whatever the surface.
Homes around Shirley 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.
There’s a 12-month guarantee on every job, large or small.
- Place
- Shirley (SO15, SO16, SO17)
- Region
- Southampton
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Questions from Shirley
Is Shirley within the area you cover?
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.
Is window mastic in a coastal place like Shirley any different?
Coastal homes put outside sealant through more weather than inland ones, so preparation and the right sealant matter all the more. Walls facing the sea are usually the first to need attention.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Can you seal over the old sealant?
No, and we never do. It can look neat for a few weeks, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
Can you do upstairs windows?
Usually, yes. We plan safe access before the job, so mention the height and anything in the way.
Are you an approved applicator?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.
Do you remove the old sealant?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Do you seal inside as well as outside?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Landlord and commercial work in Shirley
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Housing providers, facilities teams and property managers book us too in Shirley and across Southampton. We can quote a run of properties together, and we are fully insured for the work.
The process
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it usually takes a few hours for a handful of frames, longer for a whole house. A visit to Shirley 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.
- We check each frame and agree which ones need doing.
- We remove the old mastic and clean the frame and the wall.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Preparing for the visit
- Clear the area around the work
- Mention any parking rules near the property
- Tell us about any water getting in
How to get a quote
To get a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear price before any work starts.
Advice
Do you need window mastic in Shirley?
Sills take more water than any other part of a window, so the sill ends and the joint below the frame are common leak points. Failed sealant there lets rain into the wall or behind the frame.
Common reasons people contact us are:
- Cracked sealant at the sill ends
- Black, perished sealant on frames
- Untidy mastic left by window fitters
- Cold air getting in at the frame edge
If you live in an older home near Shirley Parish Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
What your quote should include
- What the quote includes, VAT included or not
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- Which colour the sealant will be
DIY versus a professional finish
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 doesn’t work out, we can still put it right.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Wash the frames with mild soapy water
- Do not aim a pressure washer at the joints
- Paint up to the joint, not over it
- Don’t use solvent cleaners on the joint
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Signs to watch for: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.
Why deal with it now?
A quick bead over the top of old mastic looks like an easy fix, but it won’t grip old, dirty sealant. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a smaller place like Shirley, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed. Ask us for a quote and we’ll go through it with you.
Why book with us
- Old sealant always removed completely
- Fully insured
- A sealant colour to suit the surroundings
- 20+ years of sealant experience
See our cost guide or customer reviews.
Different surfaces, different methods
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the new bead is laid against the frame and the wall and tooled smooth.
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Frames and glazing around Shirley
Shirley is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Southampton Tudor House and Garden (about 1.9 miles south-east) nearby, there’s older building stock in the area around Shirley as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like Wordsworth Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Millbrook (Hants) station, renewing tired window mastic between tenants heads off draught and damp complaints.
Shirley is about 2 miles west of Southampton, in Southampton. Every kind of property in Shirley can book us for window mastic, old or new, large or small. The work is guaranteed for a year. We cover 40 towns and villages across Southampton, from the larger towns to small villages.
Our applicators cover all of SO15, SO16 and SO17 for window mastic. That includes homes and businesses on May Road, Dyer Road and York Road. Main roads around Shirley include the A3057, so getting to you is simple. Nearby, we also carry out window mastic in 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). We also work in nearby towns such as 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). Shirley is among the bigger towns we cover in Southampton.
What’s near Shirley
We work in homes and buildings around The Crown Public House, St James' Park and Regents Park Community College, among other places. For rail, the closest station is Millbrook (Hants) station, roughly 0.7 miles south of the centre. Well-known places in the area include Netley Castle (4.4 miles south-east) and Foresters Museum & Archive (1 mile south-east). The countryside around Shirley includes Testwood Lakes.