Hampshire · England
Sand mastic for sash & case windows in New Milton, Hampshire
Sand mastic across New Milton and nearby, with old sealant always removed completely and a one-year guarantee.
- Tired mastic found when preparing windows for paint
- Failed mastic on an exposed elevation
- Gaps between timber frames and stone or brick
How we handle sand mastic in New Milton
If your home is listed or in a conservation area, check with your local planning authority if consent is needed before window work. Like-for-like sand mastic is often the preferred finish. We’re often asked to deal with failed mastic on an exposed elevation and draughty sash windows at the surround, across timber door frames, stone surrounds and tenement windows.
Many houses in smaller places like New Milton have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows, and any older timber or sash windows need a sealant that suits them.
Our work is backed for twelve months, and the guarantee is the same wherever you are.
- Location
- New Milton (BH25)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
If you are 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.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
How it works
A visit follows a simple pattern: we check the joints, protect the area around them, do the work and clear up. It normally takes anything from a few hours to a full day, depending on how many windows. A visit to New Milton is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- First, we look at the surrounds with you and agree what needs doing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Mention any parking rules near the property
- Where the joints are inside, avoid wetting them before we arrive
- Clear items away from the joints we’re working on
Get a quote
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is.
Related advice
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Check with your local planning authority if your home is listed
- Inspect the joints round the windows every year or so
- Avoid heavy scraping on the mastic joint
- Make sure water runs off the sill
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
An open joint round the box lets weather through. The longer it’s left, the more the joint opens as more mastic falls out.
How we quote for sand mastic
The price is agreed before any work begins. It takes into account:
- The old material and how stubborn it is
- The size of the job
- The product the joint needs
- Mould in or behind the old joints
Doing several joints on one visit usually makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. We will send you a clear quote for the lot.
What we need to know
Photos help, but a description is a good start. Try to tell us:
- A few photos by email, if you can
- If it’s domestic, commercial or a hotel
- Access, such as stairs, a lift or height
- Where the job is, and your postcode
Every job is quoted individually, so start by telling us what you need. Just phone 0345 464 0079 or drop us an email with the details and send pictures if you have them.
What we cannot put right
We’d rather tell you now than do work that won’t last, so these are the limits:
- Broken panes
- Masonry that needs repairing
- Planning or listed building consent (your local planning authority decides)
If you’re not sure, just phone 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Stone surrounds
- Timber door frames
- Sash and case windows
- Period & listed homes
- Tenement windows
- Brick reveals
Landlord and commercial work in New Milton
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
Landlords and letting agents in New Milton can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
Frames and glazing around New Milton
New Milton is within about 2 miles of the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. That’s hard on the mastic around older windows and doors, especially on the side facing the sea. Historic houses like Highcliffe Castle (about 2.7 miles south-west) are a reminder that the area around New Milton has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near New Milton station, any sash windows need sound mastic to keep draughts and rain out. For an older house near a landmark such as Parish Church of St Magdalene, the joint between an old wall and a newer frame is normally the first place rain gets in. Managing a site like The Arnewood School? Then larger buildings have plenty of frames, and the mastic around each one ages.
New Milton is in Hampshire. New Milton gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. New Milton is one of 683 places in Hampshire where we work for sand mastic. You can also see our page for Southampton, about 16 miles away.
Postcode districts we cover here for sand mastic: BH25. Streets in the area include Station Road, Worthy Road and Whitefield Road, and we cover them all. New Milton sits on or near the A337 and B3055, so getting to you is simple. We also cover the places around New Milton: Ashley (1 mile north-east), Barton on Sea (1 mile south), Bashley (1 mile north), Ossemsley (2 miles north) and Hordle (2 miles east). Within a short drive, we also cover Totton (13 miles north-east), Lymington (5 miles east), Hythe (13 miles north-east), Ringwood (8 miles north-west), Dibden Purlieu (13 miles north-east) and Marchwood (13 miles north-east).
Near you in New Milton
Locally, jobs take us to homes and businesses close to The George Centre pub and New Milton Junior School, among other places. New Milton has its own railway station: New Milton station. Other landmarks nearby include Highcliffe Castle (2.7 miles south-west) and Sammy Miller Motorcycle Museum (1 mile north-west). Green spaces nearby include Milford on Sea LNR.
New Milton questions
Does living near the coast affect sand mastic in New Milton?
Near the sea, outside joints face more wind, rain and salt than they would inland, so preparation and the right sealant matter all the more. It’s worth checking the walls that face the sea first.
I let a flat near New Milton station. Can you help?
Yes, landlords and agents are among the people we work for. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
How long does sand mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to a full day, depending on how many windows. We’ll tell you when we quote.
Can you quote for more than one area?
Yes, we can. More than one area can go on one quote.
Can old silicone round a sash window be swapped for sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic can sit properly.
Is consent needed for window work on a listed home?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Which is right for my windows, sand mastic or modern sealant?
That depends on your windows. Period windows in stone or brick usually suit sand mastic, while modern frames normally get a flexible sealant.
Is it messy?
No. We protect the surfaces around the joints, and we clear up the old sealant and our materials before we leave.
Why act early in New Milton
A silicone bead can be quicker, but it can look wrong on a period surround. Sand mastic suits the building and blends with the stone or brick. Around New Milton, water from a failed joint in an older home can soak into timber and plaster, and that is a much bigger job than renewing the sealant.
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all play a part, and we will explain the quote if you ask.
Why us?
- We’re fully insured
- More than 20 years in sealant work
- Quality sealants from Arbo and Everbuild
- Every job guaranteed for a year
See how sealant jobs are priced and our reviews.