Hampshire · England
Window & door mastic in Northington, Hampshire
We cover Northington 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.
- Draughty joints inside around the window
- Hard, cracked sealant around windows
- Rain getting in at the frame or under the sill
Work for landlords, hotels and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Keeping joints in good order is simple maintenance that we can handle for you.
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 handle window mastic in Northington
Frames and walls don’t move together. Heat and cold make frames grow and shrink against brick or render that hardly moves. That is why the joint needs a flexible, low-modulus sealant rather than something rigid. If you’re dealing with rain getting in at the frame or under the sill and draughts coming in around windows and doors, we can put it right, on uPVC windows, aluminium frames and window sills alike.
Homes in small places like Northington often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
Each job carries a 12-month guarantee, large or small.
- Location
- Northington (SO24)
- Region
- Hampshire
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Do not aim a pressure washer at the joints
- Don’t paint over the silicone
- Check the mastic once a year
- Keep drainage slots and sill grooves clear
Silicone cannot generally be painted, so mention any painting plans before we start. We can use a paintable sealant where that matters.
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.
Window mastic in Northington: local notes
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.
In the older streets around Church of St John the Evangelist, the joint between an old wall and a newer frame is normally the first place rain gets in.
Northington is about 7 miles north-east of Hyde, in Hampshire. If you need window mastic in Northington, it’s easy to get a quote: please call 0345 464 0079 or email us. We’re based in Crawley and cover Hampshire. Across Hampshire, we cover 683 places, and Northington is one of them. You can also see our page for Southampton, roughly 17 miles from Northington.
All of SO24 is within our area for window mastic. Other places close to Northington include Totford (1 mile north-east), Brown Candover (1 mile north-east), Old Alresford (2 miles south-east), Bighton (3 miles south-east) and Preston Candover (4 miles north-east). Larger places within reach include Basingstoke (10 miles north), Winchester (8 miles south-west), Eastleigh (13 miles south-west), Andover (14 miles north-west), Chandler's Ford (13 miles south-west) and Alton (9 miles east).
Local landmarks in Northington
Around Northington, our work takes us to homes and buildings near The Woolpack Inn, among other places. The closest station to Northington is Micheldever station, roughly 4.6 miles north-west of the centre. Other landmarks nearby include Barton Castle (3.2 miles east).
Common questions in Northington
Is Northington in your area for window mastic?
Yes. Our work covers London and the South East, and Northington is part of that. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
Is Northington within the area you cover?
Yes. Northington is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How many windows can you do in a day?
Allow most of a day for a typical house, less for a few frames. Access and the amount of old mastic make the biggest difference.
Can tenants book the work?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
Can I add another job to the visit?
Yes, we can. More than one area can go on one quote.
Do you guarantee window mastic?
Yes. All our work carries a 12-month guarantee, and we are fully insured.
When is the sealant fully cured?
It depends on the product. We tell you how long to leave it before we go.
Do you work for landlords and businesses?
Yes, regularly. Several properties can be quoted together, and between tenancies is a good time for the work.
Also near Northington
More services for Northington
Should I try it myself first?
Some jobs are best left to a professional: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
A DIY attempt does not rule out a professional job. We cut it out and start again.
How the visit works
Good joint work is mostly preparation, and we do not rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for a handful of frames, longer for a whole house. Somewhere like Northington needs a little journey planning: let us know about lanes, gates and parking. We bring what the job needs, so it can be finished in one trip where possible.
- First, we confirm safe access to each frame.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- On commercial sites, let us know about site rules
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job.
Advice
Different surfaces, different methods
Timber windows & doors
Soft or rotten wood cannot be sealed successfully. We will point out any rot we find, as a joiner will need to deal with it.
uPVC windows
Fitters’ mastic on plastic frames is sometimes thin and rushed. It comes out, deep gaps get backing rod and the joint is resealed.
Do you need window mastic in Northington?
Sills take more water than any other part of a window, and the ends of the sill, where it meets the wall, are where it gets in. When that sealant fails, water gets into the wall or under the frame.
Common reasons people contact us are:
- Draughty joints inside around the window
- Mastic that’s falling out in pieces
- Hard, cracked sealant around windows
- A bead that does not match the frame
Rented homes near Micheldever station change hands often, and cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Comparing quotes
- Are they insured?
- Which sealant they’ll use, and why
- How much experience the applicator has
- The length of the guarantee
What we cannot put right
It helps to know what we can’t do too:
- Damp coming through the wall itself rather than the frame joint
- Condensation trapped between the panes
- A door that needs adjusting, rehanging or new seals
If in doubt, phone 0345 464 0079 or email us and we will say what we think.
Joints and surfaces we work on
- Composite doors
- Aluminium frames
- Timber windows & doors
- Patio & French doors
- uPVC windows
- Window sills