Hampshire · England
Window Mastic in Horseport
Window and door frames in Horseport need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Cracked sealant at the sill ends
- Draughts coming in around windows and doors
- Untidy mastic left by window fitters
Window mastic in Horseport: local notes
Historic houses like Breamore House (about 3 miles north) are a reminder that the area around Horseport has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For an older house near a landmark such as St Mary's Church, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Horseport is in Hampshire. Across the SP6 area, we can carry out window mastic at your property. Horseport is one of 683 places in Hampshire where we work for window mastic. For nearby work, see our Southampton page (17 miles or so).
Our applicators cover all of SP6 for window mastic. Streets in the area include Bridge Street, Southampton Road and Ringwood Road. If you are just outside Horseport, we cover Fordingbridge (1 mile north-west), Criddlestyle (1 mile east), Stuckton (1 mile south-east), Lower Burgate (1 mile north) and Tinkers Cross (1 mile north-west). We also work in nearby towns such as Totton (12 miles east), Romsey (14 miles east), New Milton (13 miles south-east), Ringwood (6 miles south), Barton on Sea (14 miles south-east) and Marchwood (15 miles east).
What’s near Horseport
Locally, jobs take us to homes and businesses close to The Burgate School and Sixth Form and The George Inn and the streets around them. Well-known places in the area include Fordingbridge Doll Museum (under half a mile west) and Godshill Castle Hill (1.6 miles north-east). Open spaces near Horseport include Blashford Lakes and Linbrook Lake.
Window mastic in Horseport, done properly
From a single sill to a whole house of windows, the work is priced before anything is done. To get one, call 0345 464 0079 or send us an email with the number of frames and any access details. If you have cracked internal joints between frame and plaster and white mastic on grey or black frames, we can help, on patio & French doors, uPVC windows and aluminium frames alike.
Homes in small places like Horseport often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a 12-month guarantee, so you are covered after we have gone.
- Location
- Horseport (SP6)
- Region
- Hampshire
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near Horseport
Also in Horseport
Why it’s worth doing now in Horseport
Once mastic fails, rain can get between the frame and the wall. Over time that can mean damp patches, damaged plaster and rotting timber. Resealing now is a small job by comparison. Where a wall is exposed, as many are in small places like Horseport, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
What you get with us
- Any old sealant cut out fully, not covered over
- Sealant colour chosen to suit
- Sanitary silicone with an anti-fungal additive in wet areas
- A 12-month guarantee on all work
Take a look at how sealant jobs are priced or our reviews.
How the visit works
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. Most jobs then take anything from an hour or two to a full day, depending on how many frames there are. For a village or hamlet like Horseport, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
How to prepare
- Mention any parking rules near the property
- On commercial sites, let us know about site rules
- Tell us about access, such as stairs, a lift or high-level joints
How to get a quote
Quotes start with a quick conversation. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, ring 0345 464 0079 or drop us an email.
Related advice
What the job involves on each surface
Composite doors
An exposed front door gets wind-driven rain. We pay most attention there.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so the joint needs a low-modulus sealant that stays flexible. We match white, brown, anthracite grey and black frames.
Horseport: your questions answered
Is Horseport within the area you cover?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you cover Horseport for window mastic?
Yes, Horseport is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear quote.
Do you remove the old sealant?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
Can I add another job to the visit?
Yes. Just list everything you need and we will quote it together.
How do I get a quote for window mastic in Horseport?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
What should I tell you?
The location, the problem and the rough size of the job. If you can, email a few photos.
Is the new sealant paintable?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Tell us if you are decorating and we’ll choose accordingly.
How long should I leave it?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint before we leave.
What we cannot put right
We will always be straight with you, so here’s what new sealant won’t do:
- Condensation trapped between the panes
- Damp coming through the wall itself rather than the frame joint
- A sash or casement that will not close properly
If you are not sure, just ring 0345 464 0079 or email us and we will give you a straight answer.
What we seal
- Aluminium frames
- uPVC windows
- Patio & French doors
- Composite doors
- Timber windows & doors
- Window sills
Can I do it myself?
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.
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 doesn’t work out, we can still put it right.
Signs you need window mastic in Horseport
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
The problems people generally mention when they call are:
- Sealant in the wrong colour for the frame
- Mastic that has split away from the wall
- Cracked sealant at the sill ends
- Gaps left after new windows were fitted
For site and facilities teams at buildings such as Fordingbridge Infant School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Whether all the old sealant comes out first
- When the joint can take water or movement
- Whether you can choose the colour
- What product goes in the joint
Aftercare tips
To keep the joints looking good and working properly:
- Use gentle cleaners on frames and sealant
- Keep solvents and bleach off the sealant
- Avoid blasting the frames with a pressure washer
- Ventilate rooms so frames do not stay wet inside
Clean the frames with mild soapy water, and keep solvents and harsh chemicals off the joint.
A failed joint lets water into the wall a little at a time. Often the first sign is a damp patch inside or flaking paint on the reveal. Catching it early keeps the fix to a reseal.