Hampshire · England
Sand mastic for sash & case windows in Hartley Wintney, Hampshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for householders, landlords and businesses in Hartley Wintney. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cement or filler used on old window joints that has cracked
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
About our sand mastic in Hartley Wintney
Fresh sand mastic forms a skin quite soon, but it takes longer to harden fully. Traditional guidance is not to paint over it, so ask us before you decorate. Typical jobs include failed mastic on an exposed elevation and cracked mastic round a front door frame, on stone surrounds, tenement windows and brick reveals.
Homes around Hartley Wintney range from older properties to newer houses, and their windows range just as widely. The right sealant depends on the frame and on what it sits in.
A one-year guarantee comes as standard, so you are covered after we have gone.
- Place
- Hartley Wintney (RG27)
- Wider area
- Hampshire
- Cover
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
What affects the quote in Hartley Wintney
The quote reflects the job in front of us. We take into account:
- Working hours on commercial sites
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
- How many rooms, windows or areas are involved
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- A few pictures by email, if you can
- The problem you’ve noticed
- Whether it’s a home or a business
- The rough size of the job
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Why deal with it now?
Filling over old, loose mastic does not last. We remove the loose material first so the new work lasts. In a smaller place like Hartley Wintney, wherever a wall is exposed, a failed outside joint is a real source of damp. Inside, a split seal lets water into floors and panels just as it would anywhere.
A few things move the cost up or down: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. We take all of that into account in your quote.
Why choose Mr Mastic in Hartley Wintney
- Full insurance on every job
- We never seal over old sealant
- Domestic, commercial and hotel work
- Every job guaranteed for a year
Read our cost guide or customer reviews.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Ask the planning authority about consent for listed or conservation-area homes
- Ask us before painting near the mastic
- Keep sills and gutters clear so water drains away
- Get any rot dealt with first
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Do you need sand mastic in Hartley Wintney?
Scraping and sanding before painting can loosen old mastic. Many people find it crumbling when they prepare the windows.
Keep an eye out for any of the following:
- Patchy fillers round a sash window
- Modern sealant on a period surround
- Mastic that needs renewing before redecorating
- Open joints round the window box
Schools such as Greenfields Junior School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- What preparation is included
- Who does the work, and how experienced they are
- How the colour is chosen
- What the cure time is
What sealant work can’t fix
To be straight with you, there are a few things sealant will not fix:
- Crumbling stone or brickwork round the window
- Putty and glazing repairs
- Decayed frames that need repair
If you are not sure, just call 0345 464 0079 or email us and we will give you a straight answer before you book.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Stone surrounds
- Period & listed homes
- Tenement windows
- Sash and case windows
Sand mastic in Hartley Wintney: local notes
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you let a flat or house near Winchfield station, cracked sand mastic around sash windows lets in the draughts tenants complain about. If you live in an older home near St John's Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Hartley Wintney is about 4 miles north-west of Fleet, in Hampshire. For sand mastic in and around Hartley Wintney, it’s easy to get a quote: please phone 0345 464 0079 or email us. We cover Hampshire from our Crawley base. Our area takes in 683 places across Hampshire. There’s also a page for Reading, about 10 miles away.
Postcode districts we cover here for sand mastic: RG27. Local streets include London Road, High Street and Harthouse Court, and we cover them all. Other places close to Hartley Wintney include Mattingley (2 miles west), Hazeley (2 miles north-west), Hound Green (3 miles north-west), Rotherwick (3 miles west) and Bramshill (3 miles north-west). Further out, we also cover Basingstoke (9 miles west), Farnborough (6 miles east), Fleet (4 miles south-east), Aldershot (7 miles south-east), Alton (11 miles south) and Yateley (4 miles north-east).
Landmarks near Hartley Wintney
We work in homes and buildings around The Waggon & Horses pub, among other places. The closest station to Hartley Wintney is Winchfield station, about 1.4 miles south. A little further out are Fleet Community Hospital (2.6 miles south-east) and West Green House Agricultural Museum (1.2 miles west). Green spaces nearby include Hitches Hill and Dogmersfield Lake.
Hartley Wintney: your questions answered
Can you do sand mastic in Hartley Wintney?
Yes. We work across London and the South East, and Hartley Wintney is part of that. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Do you cover smaller places like Hartley Wintney?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area to suit the site.
Do you have insurance?
Yes. We are fully insured.
Do you work for landlords and businesses?
Yes. We work in homes, commercial premises and hotels.
Is it messy?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. Most DIY failures come from sealing over old material, wet joints or too much sealant.
How long does sand mastic take to harden?
Not right away. It skins first and hardens fully later, and we will tell you what to expect.
DIY versus a professional finish
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is, and the work is guaranteed for a year.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Towns and villages near Hartley Wintney
What else we do in Hartley Wintney
How it works
There isn’t much for you to do on the day. Show us the job and we will take it from there. The job generally takes anything from a few hours to a full day, depending on how many windows, including the tidy-up. Parking around Hartley Wintney is usually easier than in a town centre, but mention any lanes, gates or long drives. If the job is outside, tell us about side access and how high the joints are.
- We start by checking each surround and agreeing the joints to renew.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- We dress the surface so it sits neatly against the masonry.
How to prepare
- Let us know about parking restrictions
- Let us know about earlier repairs to the joints
- Tell us about any water getting in
Get a quote
Call for a quick quote, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work and send you a clear quote.