Hampshire · England
Andover Down Window Mastic
Window mastic for Andover Down and the surrounding area: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Cracked internal joints between frame and plaster
- A bead that does not match the frame
- Rushed sealant from a window installation
Window mastic for homes and businesses in Andover Down
If you can feel air around a shut window, the gap is often at the frame. A new joint stops the air getting through. If the draught is through the window seals instead, we’ll tell you. We work on timber windows & doors, composite doors and patio & French doors, and people most often call us about cracked sealant at the sill ends and draughty joints inside around the window.
In a village or hamlet like Andover Down, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
The work is guaranteed for twelve months. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Where
- Andover Down (SP11)
- Region
- Hampshire
- Guarantee
- A year, on every job
- Quotes
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
How to look after the new joints
So the new joints stay in good condition:
- Do not aim a pressure washer at the joints
- Don’t paint over the silicone
- Keep drainage slots and sill grooves clear
- Keep solvents and bleach off the sealant
Most silicone sealants won’t take paint, so if you’re planning to paint the frames or walls, tell us beforehand. There are paintable sealants for joints that need it.
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.
For landlords and businesses
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured.
How the job changes by surface
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that’s what we find.
Window sills
Sills catch the water running down the glass, so the joints at each end and underneath matter. Each is cleaned out and resealed.
What happens if it’s left?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone are not designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Around Andover Down, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
Why Andover Down clients choose us
- ARBOMaster approved applicator
- Sanitary silicone with an anti-fungal additive in wet areas
- Every job guaranteed for a year
- We never seal over old sealant
Take a look at our cost guide and our reviews.
Quotes for window mastic in Andover Down
Call for a quick quote. The main things that affect it are:
- How many areas need sealing
- The old material and how stubborn it is
- The type of sealant required
- Mould in or behind the old joints
A failed joint rarely gets cheaper to fix by waiting. If you’re not sure whether it needs doing, phone 0345 464 0079 or send us an email for an honest opinion and a quote.
What we need to know
There’s no need for technical detail. Just tell us:
- Photos by email, if that’s easy
- How we’d reach the joints
- Whether it has been sealed before
- Whether it’s a home or a business
Getting a quote is simple: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll come back to you with a quote.
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before any work starts. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere like Andover Down needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- First, we confirm safe access to each frame.
- Old, cracked mastic is removed completely, along with any loose debris.
- Frame and wall are cleaned and must be dry before sealing.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Before we arrive
- Tell us about access, such as stairs, a lift or high-level joints
- Clear items away from the joints we are working on
- Let us know if you’ve seen damp or leaks
Getting a quote
Need a quote? Please call 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and send you a clear quote before we start.
Related advice
Nearby places to Andover Down
Also in Andover Down
What we’re called out for in Andover Down
Mastic ages in the weather. Sunlight dries the surface out, until it loses its stretch and starts to crack.
Signs it’s time to call us include:
- Cracked sealant at the sill ends
- Untidy mastic left by window fitters
- Damp patches on the reveal after heavy rain
- Draughty joints inside around the window
Letting a property close to Andover station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Questions to ask before booking
- Whether VAT is included
- The length of the guarantee
- How much experience the applicator has
- Is the old sealant removed completely?
Andover Down questions
I let a flat near Andover station. Can you help?
Yes, we work for letting agents and landlords. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before any work starts.
Can you do window mastic in Andover Down?
Yes, Andover Down is within the area we cover. Our work covers London and the South East. You can ring 0345 464 0079 or send us an email and tell us what needs doing, and we will give you a clear price.
What sealant 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.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
What do you need from me for a quote?
The location, the problem and the rough size of the job. If you can, email a few photos.
Is the new sealant paintable?
Most silicone cannot be painted. If you plan to paint, tell us first and we can use a paintable sealant where it suits the joint.
Do I need to be at home?
It depends on the job. For work indoors, someone needs to let us in, while outside work can sometimes be arranged differently.
Can you reach windows above the ground floor?
Yes, where it’s safe. Higher or awkward frames may need extra access, and we will confirm what’s needed.
Window mastic in Andover Down: local notes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you look after a building such as Pilgrims' Cross CofE Aided Primary School, its window and door frames need their mastic kept sound, just like a home’s.
Andover Down is about 2 miles east of Andover, in Hampshire. Every kind of property in Andover Down can book us for window mastic. Every job comes with our 12-month guarantee. Across Hampshire, we cover 683 places, and Andover Down is one of them. We also work in Southampton, about 20 miles from Andover Down.
We work across SP11 for window mastic and the streets around it. Local streets include London Road and The Middleway, all of which we cover. We also cover Picket Piece (1 mile north), Finkley Down (1 mile north-west), Picket Twenty (1 mile south-west), Finkley (1 mile north-west) and East Anton (2 miles north-west). Within a short drive, we also cover Basingstoke (15 miles east), Winchester (12 miles south-east), Romsey (15 miles south), Hyde (11 miles south-east), Tidworth (10 miles west) and Weeke (11 miles south-east).
Around Andover Down
In Andover Down, that means homes and buildings near Winton Community Academy and Winton Community Academy, among other places. For rail, the closest station is Andover station, about 2.6 miles west. Nearby you will also find Andover War Memorial Hospital (2.6 miles west) and Finkley Down Farm Museum (1 mile north-west). Not far away are Mill Lake and Anton Lakes.