Hampshire · England
Alderholt Sand Mastic
Sand mastic for Alderholt and the surrounding area: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Silicone on a period window that looks wrong
- Weathered mastic on the most exposed windows
- Gaps where the frame meets the masonry
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Homes in smaller places like Alderholt can face more weather, and failed outside joints let damp into walls. Inside, a split seal lets water into floors and panels just as it would anywhere.
Combining jobs into one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
Why Alderholt clients choose us
- Fully insured
- Tidy, careful work
- Trusted Arbo and Everbuild sealants
- Approved under the ARBOMaster scheme
Read what affects the cost and what customers say.
How we handle sand mastic in Alderholt
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder and built up by hand. On older homes, it suits the building far better than silicone. If you have silicone on a period window that looks wrong and mastic dropping out of the joint, we can help, whatever the surface.
In a smaller place like Alderholt, some walls face open ground and catch the full force of the weather. The mastic around frames on those walls tends to age faster.
We stand behind the work with a one-year guarantee, so you are not left on your own once the job is done.
- Where
- Alderholt (SP6)
- Wider area
- Hampshire
- Cover
- A year, on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How we quote for sand mastic
Your quote is based on your job. We look at:
- How easy the joints are to reach
- Any mould that needs treating
- The type of sealant required
- When we can work, for business premises
Homes and businesses are quoted the same way: the amount of work, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- The problem you’ve noticed
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- Roughly how big the job is
We do not publish a price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or email us.
What happens on the day
Good joint work is mostly preparation, so that’s where we spend the time. Every joint is cleaned and dried before new material goes in. All told, the work takes a few hours per window, depending on the condition of the joints. In a smaller place like Alderholt, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about earlier repairs to the joints
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
For a quote, call 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear price before any work starts.
Advice
Aftercare tips
After the cure time, these simple habits help:
- Ask a joiner to look at soft timber first
- Take care around the mastic when scraping paint
- Leave the new mastic unpainted
- Sort the mastic before the decorators arrive
Do not run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
How the job changes by surface
Brick reveals
Loose mastic comes out and deep gaps are packed before pointing.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours, so check who is responsible first.
Towns and villages near Alderholt
Also in Alderholt
Alderholt homes and the weather
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Breamore House (about 4.5 miles north-east) are a reminder that the area around Alderholt has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around Church of St James, the joint between an old wall and a newer frame is generally the first place rain gets in.
Alderholt is in Hampshire. Alderholt gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across Hampshire, we cover 683 places, Alderholt among them. You can also see our page for Southampton, about 19 miles away.
Every address in SP6 is within our area for sand mastic. That includes homes and businesses on Station Road, Antell's Way and South Hill. With the B3078 close by, Alderholt is easy for our applicators to reach. Other places close to Alderholt include Sandleheath (1 mile north), Ashford (2 miles north-east), Broxhill (2 miles west), Damerham (2 miles north-west) and Rockbourne (4 miles north). Further out, we also cover Totton (14 miles east), New Milton (13 miles south-east), Ringwood (5 miles south-east), Barton on Sea (14 miles south-east), Ashley (13 miles south-east) and St Leonards (6 miles south).
Around Alderholt
We work in homes and buildings around The Churchill Arms and The Burgate School and Sixth Form and the streets around them. Nearby you will also find Godshill Castle Hill (3.6 miles north-east) and Fordingbridge Doll Museum (2 miles north-east). For a walk, there’s Blashford Lakes and Linbrook Lake.
Landlord and commercial work in Alderholt
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.
For anyone letting property in or around Alderholt, several properties can be quoted together. Just tell us the addresses and what each one needs, and photos by email help.
Do you need sand mastic in Alderholt?
Most of it is simply age. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
It’s worth asking for a quote if you see:
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
- Crumbling sand mastic round a window
- Weathered mastic on the most exposed windows
If you look after a building such as St James' Church of England First School, its window and door frames need their mastic kept sound, just like a home’s.
What to look for in a quote
- Which colour the sealant will be
- What the cure time is
- Whether the sealant suits the joint
- What happens if the job turns out different
Alderholt questions
Will you come out to Alderholt?
Yes. Alderholt is within the area we cover, which takes in towns, villages and rural addresses. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
What guarantee comes with sand mastic in Alderholt?
All our work, in Alderholt and everywhere else, comes with a 12-month guarantee. We are also fully insured and ARBOMaster approved.
Can I paint the new mastic?
Sand mastic is normally left unpainted, which is what traditional guidance recommends. Ask us before decorating.
Are you an approved applicator?
Yes. ARBOMaster is the approved applicator scheme for Arbo sealants, and we are part of it.
Is consent needed for window work on a listed home?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
What do you need from me for a quote?
Just the basics: where it is, what you’ve noticed and how we reach it. Then phone 0345 464 0079 or email us.
Where is Mr Mastic based?
We are a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done.