Hampshire · England
Window & door mastic in Crowdhill, Hampshire
Professional window mastic in and around Crowdhill, with every bit of old sealant taken out first.
- Mastic that has split away from the wall
- Rushed sealant from a window installation
- Old mastic that has gone black or come away
Crowdhill questions
I let a flat near Eastleigh station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Can you do window mastic in Crowdhill?
Yes. Our work covers London and the South East, and Crowdhill is part of that. You can call 0345 464 0079 or email us and let us know what needs doing.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames generally suit brown.
Should I try DIY first?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
Will resealing my frames help with draughts?
Often, yes. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
How long before the joint can be used?
Many sealants skin over quickly but take longer to cure fully. We’ll tell you how long to leave the joint before we leave.
About our window mastic in Crowdhill
A cold draught around a closed window often comes from the frame edge. Resealing that joint can make a room feel noticeably less draughty. If the draught is through the window seals instead, we’ll tell you. If you are dealing with gaps left after new windows were fitted and rain getting in at the frame or under the sill, we can put it right, on uPVC windows, window sills and patio & French doors alike.
Around Crowdhill, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, you get the same 12-month guarantee in Crowdhill and across Hampshire.
- Location
- Crowdhill (SO50)
- Region
- Hampshire
- Guarantee
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Signs you need window mastic in Crowdhill
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the brick or render around it hardly moves. If the sealant can’t stretch, it splits.
Common reasons people contact us are:
- Gaps where the sill meets the wall
- Cracked or shrunken mastic around the frame
- Sealant in the wrong colour for the frame
- Damp patches on the reveal after heavy rain
For site and facilities teams at buildings such as Wyvern Technology College, larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- When the joint can take water or movement
- Whether the sealant suits the joint
- Who does the work, and how experienced they are
- Whether VAT is included
How the visit works
We bring everything the job needs with us. After a quick look at the joints together, the area is protected and the work begins. Most jobs take anything from an hour or two to a full day, depending on how many frames there are. In a small place like Crowdhill, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- 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.
Preparing for the visit
- For business premises, tell us about site rules or sign-in
- For indoor joints, keep the area dry beforehand if you can
- Clear the area around the work
Ask for a quote
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job.
Advice
DIY versus a professional finish
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
What the job involves on each surface
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We’ll point out any rot we find, as that is a job for a joiner.
uPVC windows
Plastic frames move a lot between a hot afternoon and a cold night, so we use a flexible, low-modulus sealant. We match white, brown, anthracite grey and black frames.
What affects the cost of window mastic
For a quick quote, just ask. The main things that affect it are:
- How many rooms, windows or areas are involved
- When we can work, for business premises
- The number and length of the joints
- Whether the work is at height
Combining jobs into one visit generally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will give you a clear quote for the lot.
Helping us quote
There’s no need for technical detail. It helps if you can tell us:
- Roughly how big the job is
- Photos by email, if that is easy
- Any access issues, like height or stairs
- If someone has resealed it before
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and add pictures by email if you can.
Landlords, agents and businesses in Crowdhill
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Aftercare tips
Once the sealant has cured, a few habits help it last:
- Avoid blasting the frames with a pressure washer
- Clear any debris from frame drain holes
- Ventilate rooms so frames don’t stay wet inside
- Use gentle cleaners on frames and sealant
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak, and if anything looks wrong, just ring 0345 464 0079 or send us an email.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Places near Crowdhill
Other services in Crowdhill
Frames and glazing around Crowdhill
Historic houses like South Stoneham House (about 4.4 miles south-west) are a reminder that the area around Crowdhill 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. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you live in an older home near Church of the Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. If you let a flat or house near Eastleigh station, renewing tired window mastic between tenants heads off draught and damp complaints.
Crowdhill is about 2 miles north-east of Eastleigh, in Hampshire. Whether you’re in the middle of Crowdhill or further out, window mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Crowdhill is one of 683 towns and villages in Hampshire we cover for window mastic. Southampton is on our list too, around 6 miles away.
All of SO50 is within our area for window mastic, from the main roads to the quietest streets. Local streets include Chestnut Drive and Winchester Road, all of which we cover. We also cover Fisher's Pond (1 mile north), Nob's Crook (1 mile north-west), Colden Common (1 mile north-west), Lord's Wood (1 mile north-west) and Bishopstoke (1 mile south-west). We also work in nearby towns such as Winchester (6 miles north), Gosport (14 miles south-east), Fareham (10 miles south-east), Horndean (14 miles east), Totton (10 miles south-west) and Chandler's Ford (4 miles west).
Landmarks near Crowdhill
We work in homes and buildings around The King's School Senior and The Fox & Hounds pub. The nearest railway station is Eastleigh station, roughly 2.2 miles west. A little further out are Eastleigh Museum (2.3 miles west) and Moorgreen Hospital (3.6 miles south). Green spaces nearby include Twyford Down and Shawford Down.