Hampshire · England
Window & door mastic in Boarhunt, Hampshire
Window and door frames in Boarhunt need attention? We remove the old material, prepare the joints and seal them properly.
- Leaking joints at the ends of sills
- Whistling draughts around closed windows
- Damp patches on the reveal after heavy rain
Window mastic in Boarhunt
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. We work on timber windows & doors, uPVC windows and aluminium frames, and people most often call us about gaps where the sill meets the wall and water coming in at the bottom corners of a door.
Mastic can only go onto a dry, clean joint, so window work in Boarhunt is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Boarhunt (PO17)
- Region
- Hampshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Boarhunt questions
Does the coastal weather in Boarhunt affect outside sealant?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
I let a flat near Portchester station. Can you help?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or email us and tell us about the property, and we will give you a clear quote.
What does window mastic cost?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or email us with a short description of the job.
How many windows can you do in a day?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
Do you remove the old sealant?
Yes, every time. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Can you do several jobs on one visit?
Of course. Combining jobs makes good use of the visit, so mention them when you ask for a quote.
Do you have insurance?
Yes. Mr Mastic is fully insured, with over 20 years’ experience in sealant work.
What happens on the day
The work is kept neat and contained to the joints we’re treating, so you can carry on as normal. The job normally takes a few hours for a handful of frames, longer for a whole house, and we tell you how long to leave it before we go. In a small place like Boarhunt, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First we look at every frame and agree the list.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Finally we tidy up and check each joint.
Getting ready for the visit
- Mention any sign-in or site rules at work premises
- Mention any tricky access
- Tell us if parking is tricky
Ask for a quote
Asking for a quote is easy: let us know the job and the location. A few pictures by email make the job easier to understand, and we’ll come back to you with a quote.
Related advice
Aftercare tips
How long the joints last depends on use and care. Here’s what we suggest:
- Wash the frames with mild soapy water
- Keep timber frames painted
- Keep jet washers away from the mastic
- Wipe condensation off the frames
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Draughts get worse, not better. As old mastic keeps shrinking, the gap widens, and heat escapes around the frame. A new joint closes it up.
Should I try it myself first?
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Signs you need window mastic in Boarhunt
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces didn’t grip properly, so it comes away long before its time.
The problems people generally mention when they call include:
- Draughty joints inside around the window
- Cold air getting in at the frame edge
- Mastic that’s falling out in pieces
- Mastic that has split away from the wall
Managing a site like Cams Hill School? Then larger buildings have plenty of frames, and the mastic around each one ages.
Questions to ask before you book
- Which sealant they’ll use, and why
- What happens if they find a problem under the old sealant
- How long to leave it before use
- How the joint is cleaned and prepared
Window mastic in Boarhunt: local notes
Boarhunt is within about 2 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around window and door frames, especially on the side facing the sea. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as Church of St Nicholas, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you let a flat or house near Portchester station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Boarhunt is about 3 miles north-east of Fareham, in Hampshire. Anywhere in PO17, we can carry out window mastic at your property. Boarhunt is one of 683 places in Hampshire where we work.
We cover every part of PO17 for window mastic and the streets around it. Neighbouring places we cover for window mastic include Southwick (1 mile east), North Fareham (1 mile west), Wallington (2 miles south-west), North Boarhunt (2 miles north) and Fareham Common (2 miles south-west). Within a short drive, we also cover Winchester (15 miles north-west), Gosport (5 miles south), Havant (7 miles east), Eastleigh (11 miles north-west), Fareham (3 miles south-west) and Horndean (6 miles north-east).
Local landmarks in Boarhunt
The closest station to Boarhunt is Portchester station, roughly 1.6 miles south-east. Nearby you’ll also find Fareham Shopping Centre (2 miles south-west) and Portchester Castle (2.5 miles south-east). Not far away are Portsdown Hill and St Clair's Meadow.
Different surfaces, different methods
Window sills
The end joints of a sill tend to fail before the rest. We reseal them so rain can’t run into the wall.
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We can talk through the options.
Landlords, agents and businesses in Boarhunt
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can be quoted together.
Honest limits
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- A failed sealed unit that has misted up
- Penetrating damp from a failed cavity tray or render
- Worn gaskets, brush seals or a door that has dropped
Not sure which it is? You can ring 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Window sills
- Timber windows & doors
- Aluminium frames
- Composite doors
- Patio & French doors
- uPVC windows