Southampton · England
Window & door mastic in Hounsdown, Southampton
Mastic around window and door frames, sills and patio doors in Hounsdown, with a one-year guarantee on every job. Call for a quick quote.
- Leaking joints at the ends of sills
- Draughts coming in around windows and doors
- Cracked or shrunken mastic around the frame
Keeping the joints in good condition
Good habits help new joints last longer. A few tips:
- Don’t use solvent cleaners on the joint
- Check the mastic once a year
- Clear any debris from frame drain holes
- Paint up to the joint, not over it
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
A small gap around a frame only grows. As old mastic keeps shrinking, the gap widens, and a cold room gets colder. Resealing closes it.
Window mastic for homes and businesses in Hounsdown
Most frames have an outside joint and an inside one. The external joint is the weather seal; the internal joint closes the gap to the plaster and stops draughts. Either or both can be done. If you have sealant in the wrong colour for the frame and black, perished sealant on frames, we can help, whatever the surface.
In a smaller place like Hounsdown, some walls face open ground and catch the full force of the weather, so exposed windows and doors face the weather head on. The mastic around frames on those walls tends to age faster.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Hounsdown (SO40)
- Wider area
- Southampton
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Not every sealant suits a window. Interior caulk and bathroom silicone aren’t made for exterior frame joints. A low-modulus exterior sealant keeps its stretch through hot and cold weather. In an older home around Hounsdown, damp from a failed joint can get into timber and plaster, and that is a much bigger job than renewing the sealant.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why Hounsdown customers choose us
- Sealant colour chosen to suit
- Fully insured
- Any old sealant cut out fully, not covered over
- 20+ years of sealant experience
See what affects the cost and our reviews.
How it works
We keep the work tidy and contained to the area we are working on, so you can get on with your day. Expect the work to take most of a day for a typical house, less for a few frames, and we explain the cure time before we leave. A visit to Hounsdown 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.
- First we look at every frame and agree the list.
- We remove the old mastic and clean the frame and the wall.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Mention any tricky access
- Move anything stored near the joints
- Let us know about earlier repairs to the joints
Getting a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that’s easy.
Related advice
Hounsdown homes and the weather
Hounsdown is within about 2 miles 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 window and door frames, especially on the side facing the sea. Historic houses like Southampton Tudor House and Garden (about 4.1 miles east) are a reminder that the area around Hounsdown 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.
Homes close to Colbury Christ Church include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you look after a building such as Hounsdown School, the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Totton station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
Hounsdown is about 1 mile south of Totton, in Southampton. Every kind of property in Hounsdown can book us for window mastic, old or new, large or small. The work is guaranteed for a year. Hounsdown is one of 40 places in Southampton where we work.
Jobs for window mastic in SO40 is quoted and booked the same way as anywhere else. You’ll find streets such as Main Road, Pound Lane and Chapel Lane, all of which we cover. Other places close to Hounsdown include Ashurst Bridge (1 mile north-west), Totton (1 mile north), Netley Marsh (1 mile north-west), Woodlands (2 miles west) and Winsor (3 miles north-west). We also work in nearby towns such as Southampton (5 miles east), Shirley (3 miles east), Regents Park (3 miles east), Townhill Park (6 miles east), Midanbury (6 miles east) and Thornhill (7 miles east).
Near you in Hounsdown
In Hounsdown, that means homes and buildings near Foxhills Infant School and The Forest Inn. The nearest railway station is Totton station, about 1.1 miles north-east of the centre. Nearby you will also find National Dairy Museum (0.8 miles south) and Ashurst Hospital (1.4 miles south-west). Open spaces near Hounsdown include Testwood Lakes.
Questions from Hounsdown
Is window mastic in a coastal place like Hounsdown any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. It’s worth checking the walls that face the sea first.
Can you help a landlord with a rental near Totton station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Can you match the sealant to my frames?
Normally, yes. Tell us the frame colour when you get in touch and we’ll use the nearest match.
Can you do upstairs windows?
Generally, yes. We plan safe access before the job, so mention the height and anything in the way.
How long should I leave it?
It depends on the product. We tell you how long to leave it before we go.
Can new sealant go over the old?
No, and we never do. It can look neat for a few weeks, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Do you seal inside as well as outside?
Yes. Plenty of draughts come through the inside joint as well as the outside, so sealing both is often worthwhile.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Different surfaces, different methods
uPVC windows
We clean the frame edge carefully so the plastic isn’t marked, then the new bead is laid against the frame and the wall.
Window sills
Stone and concrete sills have their own joints, including the one between the sill and the frame above. We seal those with a sealant suited to masonry.
For landlords and businesses
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.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Quotes for window mastic in Hounsdown
For a quick quote, just ask. What matters most is:
- Any mould that needs treating
- Whether old sealant or filler has to be cut out
- The product the joint needs
- The number of rooms or windows
What you pay reflects the work, not a rough estimate. That is why we ask a few questions first and agree the price before starting.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Photos by email, if that is easy
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- How many joints, rooms or windows are involved
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or drop us an email.
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant can’t put right:
- Broken hinges, locks or handles
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can call 0345 464 0079 or email us and we will tell you honestly.
Surfaces we seal
- Patio & French doors
- Aluminium frames
- Composite doors
- uPVC windows
- Window sills
- Timber windows & doors