Hampshire · England
Window & door mastic in Northney, Hampshire
Window mastic for Northney and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Hard, cracked sealant around windows
- Draughty joints inside around the window
- Damp patches on the reveal after heavy rain
Window mastic in Northney, done properly
From a single sill to a whole house of windows, you’ll get a clear quote before work begins. Just call 0345 464 0079 or email us and tell us how many frames there are and how they’re reached. If you have rushed sealant from a window installation and mastic that’s falling out in pieces, we can put it right, whatever the surface.
Around Northney, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
All our work comes with a one-year guarantee.
- Location
- Northney (PO11)
- Region
- Hampshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
How it works
There isn’t much for you to do on the day. Show us the job and we’ll take it from there. The job generally takes a few hours for a few frames, or a day or more for a whole house from start to finish. In a small place like Northney, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- We clear up and check every joint is fully closed.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any previous sealing or DIY attempts
- Tell us if parking is tricky
Ask for a quote
We do not publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, call 0345 464 0079 or send us an email.
Related advice
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Looking after it afterwards
To keep the joints looking good and working properly:
- Use gentle cleaners on frames and sealant
- Keep drainage slots and sill grooves clear
- Do not aim a pressure washer at the joints
- Paint up to the joint, not over it
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Water gets in quietly when mastic fails. You might not see it until plaster blows or a damp patch appears inside. Catching it early keeps the fix to a reseal.
Why it’s worth doing now in Northney
Resealing frames is a short job: it takes most of a day for a typical house, less for a few frames. Leave it until water is coming in and you may need plastering and decorating as well. Where a wall is exposed, as many are in small places like Northney, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
A failed joint rarely gets cheaper to fix by waiting. If you are not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Why book with us
- Every job guaranteed for a year
- Over 20 years’ experience
- We’re fully insured
- Arbo and Everbuild products
Take a look at our cost guide and customer reviews.
DIY sealant or a professional job?
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, then guaranteed for a year.
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.
Landlord and commercial work in Northney
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
When something else is needed
A few problems are outside what sealant work can do:
- Worn gaskets, brush seals or a door that has dropped
- Penetrating damp from a failed cavity tray or render
- Broken hinges, locks or handles
If you’re not sure, just phone 0345 464 0079 or drop us an email and we will give you a straight answer.
Joints and surfaces we work on
- Aluminium frames
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Composite doors
- Window sills
What we’re called out for in Northney
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the masonry beside it stays put. A sealant that cannot keep up eventually tears.
These are the problems we’re asked about most:
- Untidy mastic left by window fitters
- Draughts coming in around windows and doors
- Hard, cracked sealant around windows
- Water coming in at the bottom corners of a door
Rented homes near Warblington station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before you book
- Are they insured?
- What happens if they find a problem under the old sealant
- Is the old sealant removed completely?
- Whether the sealant suits the joint
Your questions about window mastic in Northney
Can you help a landlord with a rental near Warblington station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Is Northney within the area you cover?
Yes, smaller places are covered as well as towns. We work across London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Where is Mr Mastic based?
Our base is in Crawley, West Sussex, and we work across South East England, London and Scotland.
How long will my window job take?
That depends on the number of frames, how they’re reached and the state of the old mastic. You will know the timing when we quote.
Do you have insurance?
Yes, we’re fully insured for domestic and commercial work.
Which products do you use?
It depends on the joint: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Do I have to be there?
That depends on where the joints are. For work indoors, someone needs to let us in.
Can you do upstairs windows?
Yes, if safe access is possible. Higher or awkward frames may need extra access, and we’ll confirm what’s needed.
Northney homes and the weather
Northney is close to 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. With historic houses such as Warblington Castle (about 1.1 miles north) nearby, there’s older building stock in the area around Northney as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
For an older house near a landmark such as Church of St Peter, frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Warblington School, larger buildings have plenty of frames, and the mastic around each one ages.
Northney is about 3 miles south-east of Havant, in Hampshire. Wherever you are in the PO11 postcode area, we can carry out window mastic at your property. 683 places in Hampshire are on our list.
We work across PO11 for window mastic. That includes homes and businesses on Northney Lane, Spinnaker Grange and Northney Road and the roads around them. Other places close to Northney include North Hayling (1 mile south), Warblington (1 mile north), Tye (1 mile south), Stoke (1 mile south-west) and Langstone (1 mile north-west). We also work in nearby towns such as Gosport (8 miles west), Havant (3 miles north-west), Fareham (10 miles west), Horndean (6 miles north), Waterlooville (5 miles north-west) and Petersfield (12 miles north).
Local landmarks in Northney
Around Northney, our work takes us to homes and buildings near Eames Farm and The Ship Inn, among other places. For rail, the closest station is Warblington station, about 1.7 miles north. Other landmarks nearby include Havant Museum (1.7 miles north-west) and Havant War Memorial Hospital (2.1 miles north-west). Green spaces nearby include Hayling Billy.