Hampshire · England
Window & door mastic in Winnall, Hampshire
Window mastic for Winnall and the surrounding area: careful preparation, the right product and tidy work. Call for a quick quote.
- Whistling draughts around closed windows
- Rushed sealant from a window installation
- Gaps where the sill meets the wall
Looking after it afterwards
Looking after new joints is easy, and it makes a real difference:
- Repaint timber before it’s bare
- Do not aim a pressure washer at the joints
- Avoid harsh chemicals near the mastic
- Air rooms to keep condensation down around windows
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Window mastic in Winnall, done properly
Frames and walls do not move together. Plastic and aluminium frames move with the temperature, while masonry stays fairly still. So the sealant has to stretch and recover, which is why we use a low-modulus product. We work on aluminium frames, patio & French doors and uPVC windows, and the jobs we see most are hard, cracked sealant around windows and cracked internal joints between frame and plaster.
In smaller places like Winnall, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Place
- Winnall (SO23, SO21, SO20)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Why it’s worth doing now in Winnall
A cracked joint around a frame lets rain into the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Homes in smaller places like Winnall can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. Your quote takes all of that into account.
Why us?
- We are fully insured
- A 12-month guarantee on all work
- Old sealant always removed completely
- Anti-fungal silicone where joints get wet
Read our cost guide and customer reviews.
Common problems we fix in Winnall
Some failures date back to when the windows were fitted. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
People generally contact us after spotting one of these:
- A bead that does not match the frame
- Cracked internal joints between frame and plaster
- Rain getting in at the frame or under the sill
- Whistling draughts around closed windows
For an older house near a landmark such as Church of St John the Baptist, the joint between an old wall and a newer frame is usually the first place rain gets in.
Before booking anyone
- Who turns up on the day
- What the cure time is
- What the quote includes, VAT included or not
- What guarantee comes with the work
Should I try it myself first?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Landlord and commercial work in Winnall
Hotels need rooms back in use, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Housing providers, facilities teams and property managers book us too in Winnall and across Hampshire. We can quote a run of properties together, and we are fully insured for the work.
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. It won’t solve:
- A door that needs adjusting, rehanging or new seals
- Damp coming through the wall itself rather than the frame joint
- Misting between the panes of a double-glazed unit (that needs a new unit)
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly before you book.
Where we work in Winnall
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Window sills
Your questions about window mastic in Winnall
I let a flat near Winchester station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or send us an email with the address and a few details, and we’ll give you a fixed price before any work starts.
Can you do window mastic in Winnall?
Yes, Winnall is within the area we cover. We work across London and the South East. Just ring 0345 464 0079 or send us an email with a few details of the job.
Is it OK to seal over old sealant?
No. New silicone will not bond to old silicone, and it traps any mould or water underneath. We remove it all first.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We will give you the cure time for the product we used.
Do you do commercial work?
Yes, regularly. We can plan bigger jobs in stages.
Do the sealants smell?
Possibly a little. It fades as the sealant cures.
Can I do it myself?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Can you do the inside joint as well?
Yes. Outside is the weather seal; inside closes the gap to the plaster. We can do either or both.
What window mastic looks like in Winnall
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.
If you let a flat or house near Winchester station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. Schools such as Winnall Primary School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages.
Winnall is about 1 mile north-east of Winchester, in Hampshire. Our applicators cover window mastic for householders, landlords and businesses in Winnall, as part of our work across Hampshire. Our area takes in 683 places across Hampshire. Southampton is on our list too, about 11 miles from Winnall.
All of SO23, SO21 and SO20 is within our area for window mastic, from the main roads to the quietest streets. That includes homes and businesses on Moss Road, Water Lane and Imber Road. Winnall is on the M3, which makes it straightforward to reach. Close by, we work in Kings Worthy (2 miles north), Easton (2 miles north-east), Abbots Worthy (2 miles north), Temple Valley (2 miles east) and Morestead (3 miles south-east). We also work in nearby towns such as Eastleigh (7 miles south), Fareham (15 miles south), Andover (13 miles north-west), Totton (14 miles south-west), Chandler's Ford (7 miles south-west) and Alton (15 miles north-east).
Around Winnall
We work in homes and buildings around Leigh House Hospital, The Golden Lion pub and St. Cross Park, among other places. Winnall’s nearest station is Winchester station, about 1 mile west of the centre. Other landmarks nearby include Winchester City Museum (0.8 miles west) and Wolvesey Castle (0.7 miles south-west). Open spaces near Winnall include Winnall Moors and Twyford Down.
Other services in Winnall
How it works
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. For most jobs that takes most of a day for a typical house, less for a few frames, and the area is left clean. For a job in Winnall, we agree the time, the access and parking before the day. 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.
- Next the failed sealant is cut away and the joint cleaned.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- We clear up and check every joint is fully closed.
How to prepare
- Tell us if parking is tricky
- Mention if the joints have been sealed before
- Move anything stored near the joints
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.