Hampshire · England
Hensting Window Mastic
Window mastic for Hensting and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- A bead that doesn’t match the frame
- Cracked or shrunken mastic around the frame
- Black, perished sealant on frames
What affects the cost of window mastic
Your quote is based on your job. We take into account:
- When we can work, for business premises
- How easy the joints are to reach
- The old material and how stubborn it is
- Whether there’s mould to deal with
Doing several joints on one visit usually makes better use of the time than several visits. We will give you a clear quote for the lot.
Asking for a quote
When you contact us, it’s useful to know:
- The problem you’ve noticed
- A few pictures by email, if you can
- The address or postcode of the job
- How we’d reach the joints
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Window mastic for homes and businesses in Hensting
Some gaps around frames are far deeper than they look. Filling it with sealant alone leaves a joint that cannot move properly, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. We work on patio & French doors, window sills and composite doors, and people most often call us about cold air getting in at the frame edge and mastic that has split away from the wall.
In a village or hamlet like Hensting, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
You get a 12-month guarantee, the same in Hensting as everywhere else we work.
- Location
- Hensting (SO50)
- Region
- Hampshire
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Hensting: your questions answered
Is Hensting within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Shawford station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Does someone need to be in?
Access is agreed with you when the job is booked. For inside work, that normally means someone being in.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Can you get sealant to suit coloured frames?
Yes. We can use white, brown, anthracite grey, black or clear.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises. Working times can be discussed when we quote.
How long does it take to reseal the windows on a house?
Allow a few hours for a handful of frames, longer for a whole house. Access and the amount of old mastic make the biggest difference.
How it works
When we get to you, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. 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 Hensting, the journey is planned in advance: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check how each frame can be reached safely.
- Old, cracked mastic is removed completely, 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.
- We tool the joint so water runs off, then clear up.
How to prepare
- Let us know if you’ve seen damp or leaks
- Tell us about any previous sealing or DIY attempts
- Clear the area around the work
Ask for a quote
For window mastic in Hensting, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before we start.
Advice
Why it’s worth doing now in Hensting
Getting a straight, even bead on an outside frame takes practice, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, using a product chosen for the frame and wall. In a small place like Hensting, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start, so you know where you stand.
Why book with us
- A sealant colour to suit the surroundings
- ARBOMaster approved applicator
- A 12-month guarantee on all work
- We leave the area clean and tidy
See our cost guide and what customers say.
Honest limits
We will not take on work that won’t last, so here’s what sealant cannot put right:
- Broken hinges, locks or handles
- Penetrating damp from a failed cavity tray or render
- Draughts through the window seals rather than the frame
Not sure which it is? You can phone 0345 464 0079 or email us and we’ll tell you honestly.
What we seal
- Timber windows & doors
- Composite doors
- uPVC windows
- Aluminium frames
- Patio & French doors
- Window sills
Also in Hensting
Frames and glazing around Hensting
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.
For landlords with property near Shawford station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. In the older streets around Church of the Holy Trinity, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Hensting is about 3 miles north-east of Eastleigh, in Hampshire. From the centre of Hensting to the outskirts, we cover window mastic for every kind of property, from flats and houses to offices and hotels. Hensting is one of 683 towns and villages in Hampshire where we work. You can also see our page for Southampton, about 7 miles away.
All of SO50 is within our area for window mastic. Close by, we work in Owslebury (1 mile north-east), Owslebury Bottom (1 mile north-east), Baybridge (2 miles east), Morestead (2 miles north) and Lane End (4 miles north-east). Within a short drive, we also cover Winchester (4 miles north), Gosport (15 miles south-east), Eastleigh (3 miles south-west), Fareham (11 miles south), Horndean (14 miles south-east) and Totton (11 miles south-west).
Local landmarks in Hensting
Around Hensting, our work takes us to homes and buildings near Ship Inn and the streets around them. For rail, the closest station is Shawford station, roughly 2.2 miles north-west of the centre. A little further out are St John's Rooms And Chapel (4.3 miles north) and Eastleigh Museum (3.5 miles south-west). The countryside around Hensting includes Shawford Down and Twyford Down.
How the job changes by surface
Window sills
Masonry sills can have joints where water gets in, and the joint under the frame can let rain run behind. Those are sealed with a product suited to stone or concrete.
Timber windows & doors
Timber moves with moisture as well as heat, so a flexible sealant is essential. The paint or stain needs to be sound where the sealant meets it.
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 matched to the joint and its conditions.
If you do try it yourself, take your time over the 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.
Looking after it afterwards
To keep the joints looking good and working properly:
- Check the mastic once a year
- Keep timber frames painted
- Don’t use solvent cleaners on the joint
- Avoid blasting the frames with a pressure washer
Keep sill grooves and drainage slots clear, so rain drains out rather than building up at the sealant.
Look out for the warning signs: cracks in the mastic, gaps you can see light through, damp on the reveal or mould around the inside of the frame. If you notice one, it’s time to get the joint looked at.