Hampshire · England
Window Mastic in New Alresford
Mastic around window and door frames, sills and patio doors in New Alresford, with a 12-month guarantee on every job. Call for a quick quote.
- Damp patches on the reveal after heavy rain
- Gaps between the frame and the inside reveal
- Whistling draughts around closed windows
Window mastic in New Alresford, done properly
Every window and door frame has a gap around it, and mastic is what closes it. When it cracks, hardens or pulls away, draughts and rain get in. The old mastic is removed and the joint resealed with a flexible exterior sealant. If you have draughts coming in around windows and doors and a bead that doesn’t match the frame, we can help, on composite doors, window sills and aluminium frames alike.
Houses in smaller places like New Alresford can stand more in the open than those in a built-up town. That is hard on the mastic around frames and sills.
All our work comes with a one-year guarantee.
- Place
- New Alresford (SO24)
- Wider area
- Hampshire
- Cover
- One year on every job
- Price
- A clear price before work begins
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
The process
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours for a handful of frames, longer for a whole house. For a job in New Alresford, we agree the time, the access and parking before the day. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We check how each frame can be reached safely.
- 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.
- We tool the joint so water runs off, then clear up.
Preparing for the visit
- Tell us about any water getting in
- Let us know about parking restrictions
- Try not to wet indoor joints just before the visit
Ask for a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Read more
Towns and villages near New Alresford
What else we do in New Alresford
Landlord and commercial work in New Alresford
If you manage several properties in or around New Alresford, several properties can go on one quote. Send us the addresses and the work at each.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
New Alresford homes and the weather
With historic houses such as Hinton Ampner House (about 3 miles south) nearby, there’s older building stock in the area around New Alresford as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, 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 Baptist, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
New Alresford is about 7 miles east of Winchester, in Hampshire. Across the SO24 area, we cover window mastic for homes and businesses. We cover 683 towns and villages across Hampshire, from the larger towns to small villages. Southampton is on our list too, around 15 miles away.
Work in SO24 is quoted and booked the same way as anywhere else. Streets in the area include Station Road, Elm Road and Bramble Hill, and we cover them all. Main roads around New Alresford include the B3046 and B3047, so getting to you is simple. Neighbouring places we cover for window mastic include Bishop's Sutton (2 miles east), Gundleton (2 miles east), Cheriton (2 miles south), Hinton Ampner (3 miles south) and Bramdean (3 miles south-east). Within a short drive, we also cover Basingstoke (13 miles north), Winchester (7 miles west), Eastleigh (11 miles south-west), Horndean (14 miles south-east), Chandler's Ford (12 miles south-west) and Alton (9 miles north-east).
Local landmarks in New Alresford
Locally, jobs take us to homes and businesses close to The Running Horse Public House and Perins School, among other places. Well-known places in the area include Barton Castle (4.3 miles north-east). For a walk, there’s Shutts Copse.
Can I do it myself?
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Honest limits
To be straight with you, there are a few things sealant will not fix:
- Broken hinges, locks or handles
- Misting between the panes of a double-glazed unit (that needs a new unit)
- Soft or decayed wood in the frame
If in doubt, call 0345 464 0079 or drop us an email and we will say what we think.
What we seal
- Patio & French doors
- Composite doors
- uPVC windows
- Aluminium frames
- Window sills
- Timber windows & doors
What we are called out for in New Alresford
Frames are never completely still. Sun on a frame makes it expand, and it contracts again overnight, while the brick or render around it hardly moves. A sealant that can’t keep up eventually tears.
Common reasons people contact us are:
- Cracked internal joints between frame and plaster
- Cracked or shrunken mastic around the frame
- Water coming in at the bottom corners of a door
- A bead that doesn’t match the frame
For site and facilities teams at buildings such as Sun Hill Junior School, the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- What the cure time is
- What happens if they find a problem under the old sealant
- Whether all the old sealant comes out first
- Which colour the sealant will be
What affects the quote in New Alresford
We quote each job individually. This is what makes a difference:
- Working hours on commercial sites
- Which sealant suits the joint
- How much there is to do
- How many areas need sealing
What it costs depends on the size of the job, how much old material has to come out and access to the work. We give a clear quote before we start, so you know where you stand.
Helping us quote
To make quoting easier, please include:
- How many joints, rooms or windows are involved
- Whether it’s a home or a business
- Whether it has been sealed before
- A few photos by email, if you can
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved and give you a clear quote.
Why act early in New Alresford
A quick bead over the top of old mastic looks like an easy fix, but new sealant can’t bond to old, crumbling mastic. It soon lifts and the leak carries on behind it. Proper resealing starts with removing the old joint. In a smaller place like New Alresford, wherever a wall is exposed, a failed outside joint is a real source of damp. Indoors, a failed seal lets water into floors and panels as it would anywhere.
No two jobs are quite the same, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What you get with us
- A choice of colours where the product allows
- An ARBOMaster approved applicator
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
Read our cost guide or our reviews.
Questions from New Alresford
Is New Alresford within the area you cover?
Yes. New Alresford is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Is New Alresford in your area for window mastic?
Yes. We work across London and the South East, and New Alresford is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
How long should I leave it?
It depends on the product and the temperature. Before we leave, we will tell you the cure time.
Do you have sealant for grey or black windows?
Usually, yes. Mention the frame colour when you ask for a quote and we’ll match it as closely as we can.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do, as well as homes. We can talk about working times when we quote.
Do the sealants smell?
That depends on the sealant. Some smell for a while, some hardly at all.
Does the work come with a guarantee?
Yes, for 12 months. A yearly look at the joints helps them last.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.