Hampshire · England
Window & door mastic in Catherington, Hampshire
Mastic around window and door frames, sills and patio doors for homes and businesses in Catherington and across Hampshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Cracked sealant at the sill ends
About our window mastic in Catherington
Every window and door frame has a gap around it, and mastic is what closes it. Once that seal fails, wind and rain find the gap. The old mastic is removed and the joint resealed with a flexible exterior sealant. Common call-outs are for cracked or shrunken mastic around the frame and cold air getting in at the frame edge, on timber windows & doors, composite doors and window sills.
In a village or hamlet like Catherington, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Where
- Catherington (PO8)
- Region
- Hampshire
- Cover
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Frames and glazing around Catherington
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Catherington Church of England Infant School, the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Rowlands Castle station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Catherington is about 2 miles north of Horndean, in Hampshire. Our applicators cover window mastic for homes and businesses in Catherington and nearby, as part of our work across Hampshire. Our Hampshire coverage runs to 683 places, Catherington among them. You can also see our page for Portsmouth, roughly 9 miles from Catherington.
All of PO8 is covered for window mastic. Whether your property is on Glamorgan Road, Wrexham Grove and White Dirt Lane or anywhere close by, we can help. We also cover the places around Catherington: Clanfield (1 mile north), Lovedean (2 miles south-west), Horndean (2 miles south), Wecock Farm (2 miles south-west) and Anmore (3 miles south-west). We also work in nearby towns such as Gosport (11 miles south-west), Havant (5 miles south), Eastleigh (15 miles west), Fareham (10 miles south-west), Alton (15 miles north) and Hedge End (13 miles west).
Local landmarks in Catherington
Typical jobs here are in homes near Horndean Technology College, among other places. For rail, the closest station is Rowlands Castle station, roughly 3.5 miles south-east. Other landmarks nearby include Havant War Memorial Hospital (5.3 miles south) and Clanfield Earthwork (1.7 miles north-east). Not far away are Windmill Hill.
Surface by surface
Aluminium frames
Aluminium needs a sealant that bonds to coated metal. Neutral-cure sealant is the safe choice.
Timber windows & doors
Wood swells when it’s wet and shrinks when it dries, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
What happens if it’s left?
Failed mastic isn’t a reason to replace sound windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. If we find failed glass units or worn seals, we’ll tell you. Where a wall is exposed, as many are in small places like Catherington, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Why Catherington clients choose us
- Full insurance on every job
- We leave the area clean and tidy
- A sealant colour to suit the surroundings
- White, clear, grey or coloured to suit, where the product allows
Your questions about window mastic in Catherington
Do you cover Catherington for window mastic?
Yes, Catherington is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we’ll give you a clear quote.
I let a flat near Rowlands Castle station. Can you help?
Yes. We work for landlords and letting agents as well as householders, 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.
Are you ARBOMaster approved?
Yes. We hold ARBOMaster approved applicator status and we are fully insured too.
Can I add another job to the visit?
Yes, and it often makes sense. Doing several areas at once is generally more efficient, so mention them when you ask for a quote.
How much does window mastic cost in Catherington?
It depends on the job, so we quote each one individually. For a quick quote, call 0345 464 0079 or email us with a short description of the job.
Do you take out the old sealant first?
Always. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Can you get sealant to suit coloured frames?
Yes. White, brown, anthracite grey, black and clear sealants are all available.
Where are you based?
Our base is Crawley. We work across South East England, London and Scotland.
When something else is needed
To be straight with you, some problems need a different trade:
- Draughts through the window seals rather than the frame
- Faulty window hardware
- Condensation trapped between the panes
If you are not sure, just call 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Surfaces we seal
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Window sills
- Composite doors
Also in Catherington
Landlord and commercial work in Catherington
Water getting past a failed joint can damage the building, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
Do you need window mastic in Catherington?
Sun, frost and rain wear sealant out. UV light hardens the outside of the bead, until it loses its stretch and starts to crack.
Any of these means the joints need attention:
- Cracked internal joints between frame and plaster
- Old mastic that has gone black or come away
- Gaps where the sill meets the wall
- Sealant in the wrong colour for the frame
If you live in an older home near Church of All Saints, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Before booking anyone
- What guarantee comes with the work
- Whether they seal over old material or remove it
- What insurance they hold
- When the joint can take water or movement
Can I do it myself?
If you’re set on DIY, put the effort into 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’s fine. We cut it out and start again, so tell us about it when you ask for a quote.
What we do, step by step
On the day, we look over the joints with you first. Surfaces next to the work are protected before we start. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere as small as Catherington, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing, and primed where the sealant calls for it.
- Deep voids are backed, then the sealant is gunned in.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- On commercial sites, let us know about site rules
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we’ll talk you through the work.