Hampshire · England
Owslebury Window Mastic
We cover Owslebury for mastic around window and door frames, sills and patio doors. Old material cut out, joints cleaned and sealed neatly and a 12-month guarantee.
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
- Sealant in the wrong colour for the frame
Window mastic in Owslebury
Some gaps around frames are far deeper than they look. Packing it solid with sealant gives a joint that cannot flex, so we fit backing rod to set the right depth. That way the new bead bonds to the frame and the wall only. We work on composite doors, patio & French doors and timber windows & doors, and common reasons people get in touch are draughts coming in around windows and doors and sealant in the wrong colour for the frame.
Outdoor sealant needs dry, clean surfaces, so work on frames around Owslebury is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee.
- Place
- Owslebury (SO21)
- Wider area
- Hampshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
What we can’t put right
Before booking, it’s worth knowing the limits:
- Faulty window hardware
- Rotten timber, which needs a joiner first
- A failed sealed unit that has misted up
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think.
What we seal
- uPVC windows
- Patio & French doors
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
What we do, step by step
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes anything from an hour or two to a full day, depending on how many frames there are. Somewhere like Owslebury needs a little journey planning: 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.
- Each frame is looked over and we agree which ones need resealing.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Preparing for the visit
- Tell us about any previous sealing or DIY attempts
- Plan for the work area to be out of bounds to pets and children
- Let us know if you’ve seen damp or leaks
Ask for a quote
Getting a quote is simple: let us know the job and the location, and roughly how big it is. A few pictures by email make the job easier to understand.
Advice
How we quote for window mastic
Call for a quick quote. What matters most is:
- Which sealant suits the joint
- How many rooms, windows or areas are involved
- The old material and how stubborn it is
- Mould in or behind the old joints
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email for an honest opinion and a quote.
What to tell us for a quote
To make quoting easier, let us know:
- Where the property is
- Any access issues, like height or stairs
- What’s wrong with the joints now
- Pictures of the joints, sent by email
Need a quote? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Window mastic in Owslebury: local notes
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.
Managing a site like Owslebury Primary School? Then the mastic around its windows and doors needs looking after like any other building’s. Letting a property close to Shawford station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Owslebury is about 4 miles south-east of Winchester, in Hampshire. From the centre of Owslebury to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. We cover 683 towns and villages across Hampshire. We also work in Southampton, about 8 miles from Owslebury.
Our applicators cover all of SO21 for window mastic and the streets around it. Local streets include Beech Grove, Main Road and Pitcot Lane, and we cover them all. Neighbouring places we cover for window mastic include Owslebury Bottom (1 mile north), Baybridge (1 mile south-east), Hensting (1 mile south-west), Morestead (1 mile north) and Lane End (3 miles north-east). Within a short drive, we also cover Winchester (4 miles north-west), Gosport (15 miles south), Eastleigh (4 miles south-west), Fareham (11 miles south), Horndean (13 miles south-east) and Totton (12 miles south-west).
What’s near Owslebury
Typical jobs here are in homes near Ship Inn and the streets around them. The nearest railway station is Shawford station, about 2.8 miles west. Other landmarks nearby include Wolvesey Castle (3.9 miles north-west) and The Gurkha Museum (3.9 miles north-west). For a walk, there’s Twyford Down and Hockley Meadows.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Make sure the drainage slots aren’t blocked
- Air rooms to keep condensation down around windows
- Keep paint and stain on wooden frames in good order
- Do not use solvent cleaners on the joint
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
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.
Common questions in Owslebury
Do you cover Owslebury for window mastic?
Yes, Owslebury is within the area we cover. Our work covers London and the South East. You can phone 0345 464 0079 or email us and tell us what needs doing.
Do you work for landlords with property near Shawford station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear price.
Can I add another job to the visit?
Of course. Combining jobs makes good use of the visit.
Does the work come with a guarantee?
Yes. Each job is covered for 12 months, inside or out.
How much does window mastic cost in Owslebury?
The cost depends on the size of the job, access and how much old sealant has to come out. Ask us for a quote and we’ll talk you through it.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so it can be worth sealing both.
Do you remove the old sealant?
Yes. Sealing over the old bead is the commonest cause of early failure, and it’s something we never do.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. Photos by email help too.
DIY sealant or a professional job?
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it lifts and traps water and mould underneath. All the old material has to come out first.
Common problems we fix in Owslebury
Mastic ages in the weather. UV light hardens the outside of the bead, and over the years it loses its give, cracks and comes away.
Common reasons people contact us include:
- Cracked sealant at the sill ends
- Mastic that’s falling out in pieces
- Gaps between the frame and the inside reveal
- Mastic that has split away from the wall
In the older streets around Church of St Andrew, the joint between an old wall and a newer frame is usually the first place rain gets in.
Before you book anyone
- Are they insured?
- What product goes in the joint
- Who does the work, and how experienced they are
- What the cure time is
How the job changes by surface
Patio & French doors
Patio and French doors have the longest joints on most houses. The threshold and the bottom corners take the most water, so we pay close attention there.
Timber windows & doors
Older timber windows in stone or brick can suit sand mastic rather than modern sealant. We can talk through the options.