Hampshire · England
Sand mastic for sash & case windows in Hartley Mauditt, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Hartley Mauditt. Fully insured, ARBOMaster approved and guaranteed for a year.
- Draughts and rain around sash boxes
- Old sand mastic that has cracked, crumbled or fallen out
- Patchy fillers round a sash window
What we do, step by step
Our applicators work methodically: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours per window, depending on the condition of the joints, and the area is left clean. In a small place like Hartley Mauditt, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- Tell us if parking is tricky
- Let us know about earlier repairs to the joints
- Mention any leaks or damp you’ve noticed
Ask for a quote
If you’re in Hartley Mauditt and need sand mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
Related advice
How we handle sand mastic in Hartley Mauditt
We work across Hartley Mauditt renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. We are often asked to deal with draughts and rain around sash boxes and window mastic to renew ahead of painting, across sash and case windows, timber door frames and period & listed homes.
Homes in small places like Hartley Mauditt often stand in the open, with little to shelter their windows from wind and rain. Exposed frames and sills lose their mastic sooner than sheltered ones.
We guarantee the work for a year. If something is not right with it in that time, tell us and we’ll put it right.
- Place
- Hartley Mauditt (GU34)
- Wider area
- Hampshire
- Guarantee
- One year on every job
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We cut it out and start again, so just mention it when you contact us.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Why it’s worth doing now in Hartley Mauditt
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. Around Hartley Mauditt, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You’ll know the price before we begin.
What you get with us
- 180+ five-star Google reviews
- We never seal over old sealant
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
Read how sealant jobs are priced and our reviews.
Towns and villages near Hartley Mauditt
Other services in Hartley Mauditt
What affects the cost of sand mastic
We don’t publish a price list, because no two jobs are the same. The quote depends on:
- The product the joint needs
- How many areas need sealing
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether we need extra access for height. We take all of that into account in your quote.
What we need to know
When you call or email, these details help:
- The rough size of the job
- Whether it’s a home or a business
- A few photos by email, if you can
- How we’d reach the joints
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and send you a clear quote.
Looking after it afterwards
Good habits help new joints last longer. Our tips:
- Do not paint over the new mastic
- Look over the window mastic once a year
- Have rotten timber repaired before new mastic goes in
- Find out about consent before window work on a listed home
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Sound mastic protects the frame. Once it fails, water can sit against the timber, which can lead to rot.
Surface by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is normally favoured.
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It suits older brickwork.
Common questions in Hartley Mauditt
I let a flat near Alton station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or send us an email and tell us about the property, and we’ll give you a clear price.
Can you do sand mastic in Hartley Mauditt?
Yes. We work across London and the South East, and Hartley Mauditt is part of that. Just call 0345 464 0079 or send us an email with a few details of the job, and we will give you a clear quote.
Can you quote for more than one area?
Yes, we can. Several rooms, windows or areas can go on one quote.
What sealant do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
How long will you be here?
Most jobs take a few hours for a single window, longer for several, including the preparation. We’ll confirm how long when we quote.
What guarantee comes with the work?
Every job comes with our 12-month guarantee, and we are fully insured.
Which is right for my windows, sand mastic or modern sealant?
We’ll talk it through with you. Period homes often look best with sand mastic, and modern sealants suit newer frames.
Windows and doors in Hartley Mauditt
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near St Leonard's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Alton station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Hartley Mauditt is about 3 miles south-east of Alton, in Hampshire. Hartley Mauditt gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. Hartley Mauditt is one of 683 places in Hampshire we cover. Portsmouth is on our list too, about 22 miles from Hartley Mauditt.
Every address in GU34 is within our area for sand mastic, from the main roads to the quietest streets. Neighbouring places we cover for sand mastic include East Worldham (1 mile north), Oakhanger (2 miles east), Upper Farringdon (2 miles west), Farringdon (2 miles west) and Chawton (2 miles north-west). Further out, we also cover Basingstoke (12 miles north-west), Farnborough (14 miles north-east), Fleet (12 miles north-east), Horndean (15 miles south), Aldershot (12 miles north-east) and Alton (3 miles north-west).
Landmarks near Hartley Mauditt
The closest station to Hartley Mauditt is Alton station, roughly 2.5 miles north-west of the centre. Nearby you’ll also find Alton Community Hospital (2.5 miles north-west) and The Romany Museum (1.6 miles south). Not far away are Selborne Hill and Deadwater Valley.
When something else is needed
To be straight with you, some problems need a different trade:
- Decisions on consent for listed homes
- Decayed frames that need repair
- Crumbling stone or brickwork round the window
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before booking.
Where we work in Hartley Mauditt
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Brick reveals
- Sash and case windows