Hampshire · England
Window Mastic in Langstone
Window mastic for Langstone and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- White mastic on grey or black frames
- Water coming in at the bottom corners of a door
- Whistling draughts around closed windows
Signs you need window mastic in Langstone
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, while a joint packed solid cannot stretch. Backing rod sets the right depth.
It’s worth asking for a quote if you see:
- Black, perished sealant on frames
- Damp patches on the reveal after heavy rain
- Cracked or shrunken mastic around the frame
- Gaps where the sill meets the wall
In the older streets around Saint Nicholas' Chapel, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What to look for in a quote
- What happens if they find a problem under the old sealant
- Whether they’re fully insured
- Which sealant they’ll use, and why
- How long the guarantee is
How we handle window mastic in Langstone
Around Langstone we seal all kinds of frames: from uPVC casements to timber and aluminium, plus patio doors, French doors and sills. Each gets a sealant chosen for the frame and the wall it meets. We work on composite doors, window sills and patio & French doors, and people most often call us about a bead that doesn’t match the frame and old mastic that has gone black or come away.
Mastic can only go onto a dry, clean joint, so window work in Langstone is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
The work is covered for a year after we finish. If anything is not right with it, ring 0345 464 0079 or send us an email.
- Place
- Langstone (PO9, PO11)
- Wider area
- Hampshire
- Guarantee
- A year, on every job
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What happens on the day
All our tools and materials come with us in the van. Once we’ve agreed what’s being done, the area is protected and the work begins. It normally takes a morning for a couple of windows and a door. Somewhere as small as Langstone, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
Before we arrive
- Mention any sign-in or site rules at work premises
- Keep pets and children clear of the area while we work
- Let us know about earlier repairs to the joints
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, call 0345 464 0079 or send us an email.
Related advice
Why it’s worth doing now in Langstone
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that is needed. Problems with the glass or gaskets are for a window company, and we’ll say so. Older cottages and farmhouses around Langstone can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please phone 0345 464 0079 or send us an email.
Why us?
- White, clear, grey or another colour, product permitting
- 4.9 on Google from 180+ five-star reviews
- 12-month guarantee on every job
- We never seal over old sealant
Take a look at how sealant jobs are priced and customer reviews.
Honest limits
We won’t take on work that won’t last, so these are the limits:
- Soft or decayed wood in the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can phone 0345 464 0079 or drop us an email and we’ll tell you honestly.
Surfaces we seal
- Aluminium frames
- Patio & French doors
- Timber windows & doors
- Window sills
- Composite doors
- uPVC windows
Landlord and commercial work in Langstone
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
How we quote for window mastic
You’ll get a clear quote before we start. It’s based on:
- Whether the work is at height
- How many rooms, windows or areas are involved
- When we can work, for business premises
- Any mould that needs treating
What it costs depends on the size of the job, how much old material has to come out and access to the work. You’ll have a clear quote before any work starts.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- The address or postcode of the job
- How many joints, rooms or windows are involved
- Access, such as stairs, a lift or height
- A few photos by email, if you can
Call for a quick quote, or email us if that’s easier. Tell us about the joints that need doing and we’ll talk you through the work.
Nearby places to Langstone
What else we do in Langstone
Langstone homes and the weather
Langstone is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around window and door frames, especially on the side facing the sea. With historic houses such as Warblington Castle (about 0.8 miles north-east) nearby, there’s older building stock in the area around Langstone as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Managing a site like Bosmere Junior School? Then the mastic around its windows and doors needs looking after like any other building’s. If you let a flat or house near Havant station, renewing tired window mastic between tenants heads off draught and damp complaints.
Langstone is about 2 miles south of Havant, in Hampshire. For window mastic in and around Langstone, it’s easy to get a quote: please ring 0345 464 0079 or drop us an email. We cover Hampshire from our Crawley base. Our area takes in 683 places across Hampshire, large and small.
Work in PO9 and PO11 works the same way as everywhere else we cover. Streets in the area include Mill Lane, Langstone Road and Langstone High Street, and we cover them all. Being close to the A3023, Langstone is easy for our applicators to reach. We also cover Warblington (1 mile east), Northney (1 mile south-east), Denvilles (1 mile north-east), Stoke (1 mile south) and North Hayling (1 mile south-east). Within a short drive, we also cover Gosport (8 miles west), Fareham (9 miles west), Horndean (5 miles north), Hedge End (15 miles west), Waterlooville (4 miles north-west) and Petersfield (12 miles north).
Around Langstone
We work in homes and buildings around The Royal Oak pub and Warblington School and the streets around them. For rail, the closest station is Havant station, about 1.1 miles north of the centre. Nearby you will also find Warblington Castle (0.8 miles north-east) and Havant Museum (0.8 miles north). Green spaces nearby include Southmoor Nature Reserve.
Your questions about window mastic in Langstone
Can you help a landlord with a rental near Havant station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will give you a clear quote.
Does living near the coast affect window mastic in Langstone?
Near the coast, wind-driven rain and, nearer the shore, salt air make outside sealant work harder. The right product, a clean joint and the right depth all help it cope.
Do you cover Langstone?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland.
Can you do upstairs windows?
Yes, where they can be reached safely. Let us know about access when you ask for a quote and we’ll plan for it.
Should I try DIY first?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Will resealing my frames help with draughts?
In many cases. Air often gets in between the frame and the wall, and sealing the inside and outside joints closes that path.
How long does it take to reseal the windows on a house?
A handful of frames is a short visit, while a whole house takes longer. You will get a timescale with the quote.
Can you do the inside joint as well?
Yes, we do both. Inside, the joint between frame and plaster is sealed neatly.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
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.