Hampshire · England
Window Mastic in Fullerton
Mastic around window and door frames, sills and patio doors for homeowners, landlords and businesses in Fullerton. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cracked sealant at the sill ends
- Mastic that has split away from the wall
- White mastic on grey or black frames
Window mastic in Fullerton, done properly
Colour matters on a frame. We can seal in white, brown, anthracite grey, black or clear, so the line suits the frame instead of standing out. We work on patio & French doors, aluminium frames and window sills, and people most often call us about mastic that’s falling out in pieces and mastic that has split away from the wall.
Outdoor sealant needs dry, clean surfaces, so work on frames around Fullerton is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, whatever its size.
- Where
- Fullerton (SP11)
- Wider area
- Hampshire
- Cover
- 12 months on all our work
- Quote
- A clear quote up front
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
There’s no need to move everything out, just the space around the work. Everything nearby is protected, and the job takes most of a day for a typical house, less for a few frames for a typical job. Somewhere like Fullerton needs a little journey planning: 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.
- All the failed sealant is cut away.
- The surfaces are cleaned and left dry.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
- Mention any parking rules near the property
Ask for a quote
To get a quote, ring 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
Related advice
What sealant work cannot fix
It helps to know what we can’t do too:
- Soft or decayed wood in the frame
- Misting between the panes of a double-glazed unit (that needs a new unit)
- A door that needs adjusting, rehanging or new seals
Not sure which it is? You can phone 0345 464 0079 or send us an email and we will tell you honestly before booking.
Surfaces we seal
- Composite doors
- Timber windows & doors
- uPVC windows
- Window sills
- Aluminium frames
- Patio & French doors
Common problems we fix in Fullerton
A lot of older mastic was never designed to stay flexible. Once it’s rigid, every bit of frame movement pulls at it, and a gap opens along one edge.
Keep an eye out for any of the following:
- Cold air getting in at the frame edge
- Gaps between the frame and the inside reveal
- Black, perished sealant on frames
- Gaps left after new windows were fitted
Rented homes near Andover 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.
Questions to ask before booking
- Which sealant they’ll use, and why
- Whether VAT is included
- When the joint can take water or movement
- What happens if the job turns out different
Looking after it afterwards
Joint life depends on how it’s used and looked after. We suggest:
- Clear any debris from frame drain holes
- Wash the frames with mild soapy water
- Don’t use solvent cleaners on the joint
- Look round the frames every year or so
A yearly look round the frames is enough. Small splits are simple to catch before they leak, and if anything looks wrong, just call 0345 464 0079 or drop us an email.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
Surface by surface
Composite doors
A composite door generally sits in a plastic outer frame, and the joint around it is sealed like a window. We match the colour to the frame.
Patio & French doors
Door frames take knocks and movement every time the doors are used. A flexible sealant copes with that, where a rigid one would crack.
Windows and doors in Fullerton
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
In the older streets around Church of St Nicholas, the joint between an old wall and a newer frame is normally the first place rain gets in.
Fullerton is about 4 miles south of Andover, in Hampshire. If you need window mastic in Fullerton, it’s easy to get a quote: please call 0345 464 0079 or send us an email. We cover Hampshire from our Crawley base, Fullerton included. Our Hampshire coverage runs to 683 places, and Fullerton is one of them. There’s also a page for Southampton, roughly 16 miles from Fullerton.
Postcode districts we cover here for window mastic: SP11. Other places close to Fullerton include Cottonworth (1 mile north-east), Chilbolton (1 mile east), Leckford (1 mile south), Wherwell (1 mile north-east) and Wherwell Wood (2 miles north). We also work in nearby towns such as Winchester (9 miles south-east), Eastleigh (14 miles south), Andover (4 miles north), Chandler's Ford (12 miles south), Romsey (11 miles south) and Hyde (9 miles south-east).
Landmarks near Fullerton
Around Fullerton, our work takes us to homes and buildings near Longstock Park, among other places. The nearest railway station is Andover station, about 4.3 miles north. Other landmarks nearby include Andover War Memorial Hospital (4.6 miles north). For a walk, there’s Anton Lakes and Mill Lake.
Work for landlords, hotels and businesses
If you manage several properties in or around Fullerton, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs, and photos by email help.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can go on one quote.
Towns and villages near Fullerton
More services for Fullerton
Fullerton questions
Can you help a landlord with a rental near Andover station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Is Fullerton within the area you cover?
Yes, Fullerton is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you do commercial work?
Yes. Commercial and hotel work is a large part of what we do. Working times can be discussed when we quote.
Do you guarantee window mastic?
Yes, with our one-year guarantee. Keeping drainage clear and checking the joints yearly helps them last.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
Does someone need to be in?
It depends on the job. For work indoors, someone needs to let us in.
Can I add another job to the visit?
Of course. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Is it OK to seal over old sealant?
No, it will not last. It may look fine at first, but the new bead soon lifts. Removing the old sealant completely is the only lasting way.
DIY versus a professional finish
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is, then guaranteed for a year.
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.