Buckinghamshire · England
Sand Mastic in Four Ashes
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Four Ashes and across Buckinghamshire. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Tired mastic found when preparing windows for paint
- Mastic worn away on windows facing the weather
- Mastic round period door frames that has failed
About our sand mastic in Four Ashes
Our applicators renew the sand mastic around sash and case windows and doors set in stone or brick. Out comes the old, loose mastic, the joint is prepared and new mastic is shaped by hand. Typical jobs include mastic dropping out of the joint and modern sealant on a period surround, on brick reveals, stone surrounds and tenement windows.
Somewhere as small as Four Ashes, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, and sometimes a traditional sand mastic is the better choice.
The work is covered for a year after we finish. If there’s a problem with it, please phone 0345 464 0079 or drop us an email.
- Place
- Four Ashes (HP15, HP13)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Quotes for sand mastic in Four Ashes
We do not publish a price list. What we look at:
- The product the joint needs
- How much there is to do
- Any mould that needs treating
- The number of rooms or windows
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or drop us an email and we’ll talk you through it.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- Where the property is
- What’s wrong with the joints now
- Roughly how big the job is
- How we’d reach the joints
Asking for a quote is easy: let us know the job and the location. A few pictures by email make the job easier to understand.
Looking after it afterwards
A little care helps the new joints last. Our advice:
- Plan mastic work ahead of painting
- Clear gutters so water doesn’t pour onto the windows
- Avoid heavy scraping on the mastic joint
- Avoid patching sand mastic with silicone
When preparing windows for paint, take care around the mastic. Hard scraping can loosen it.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
What happens on the day
On the day, we start by going over the job with you, so there are no surprises. We protect the surfaces around the joints before any work starts. Most jobs take a few hours for a single window, longer for several. Somewhere like Four Ashes needs a little journey planning: let us know about lanes, gates and parking. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Large voids are packed out first, so the mastic is not too thick.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The finish is dressed so it sits neatly against the stone or brick.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Getting a quote
We do not publish a price list. Instead, your job gets its own clear quote. To arrange one, phone 0345 464 0079 or email us.
Advice
Common questions in Four Ashes
I let a flat near High Wycombe station. Can you help?
Yes, landlords and agents are among the people we work for. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Do you cover smaller places like Four Ashes?
Yes, Four Ashes is covered. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can new sealant go over the old?
No. We remove every bit of old sealant first.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator.
What information do you need?
Tell us what needs doing and where, plus photos if you have them. If we need more, we’ll ask.
Should I use sand mastic or silicone?
We will help you decide. Period homes often look best with sand mastic and newer frames suit modern sealant.
Should I try DIY first?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you’ll get one quote.
Also near Four Ashes
More services for Four Ashes
Signs you need sand mastic in Four Ashes
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
Common reasons people contact us include:
- Old cement repairs round a window that have failed
- Weathered mastic on the most exposed windows
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
Rented homes near High Wycombe station change hands often, and any sash windows need sound mastic to keep draughts and rain out.
What to look for in a quote
- Whether they seal over old material or remove it
- What the cure time is
- What insurance they hold
- Which colour the sealant will be
Leave it or put it right?
An open joint round the frame lets weather in. Left, water can reach the timber and the wall, so dealing with it now protects both. In a small place like Four Ashes, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Combining jobs into one visit normally makes better use of the time than several visits. We will give you a clear price for the lot.
Why choose Mr Mastic in Four Ashes
- Experience in homes, commercial sites and hotels
- 20+ years of sealant experience
- Fully insured
- Neat joints and a tidy finish
See what affects the cost or our reviews.
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 tell us about it when you ask for a quote.
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and does not move well, and the joint depth matters as much as the finish.
Windows and doors in Four Ashes
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Hughenden Manor (about 1 mile west) nearby, there’s older building stock in the area around Four Ashes as well as newer homes. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Schools such as Great Kingshill Church of England Combined School are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around St Michael and All Angels Church, the joint between an old wall and a newer frame is normally the first place rain gets in.
Four Ashes is about 2 miles north of High Wycombe, in Buckinghamshire. Across the HP15 area, we can carry out sand mastic at your property. 263 places in Buckinghamshire are on our list, from the larger towns to small villages. Our Reading page covers work nearby (18 miles or so).
Here we cover the HP15 and HP13 postcode area for sand mastic. Neighbouring places we cover for sand mastic include Cryers Hill (1 mile north), Terriers (1 mile south), Widmer End (1 mile north-east), Hazlemere (1 mile east) and Hughenden Valley (1 mile north-west). Larger places within reach include Aylesbury (12 miles north), Chesham (7 miles north-east), Marlow (6 miles south), Amersham (6 miles east), Beaconsfield (5 miles south-east) and Chalfont St Peter (8 miles south-east).
Near you in Four Ashes
We work in homes and buildings around The Royal Grammar School, Pipers Corner School and The Crown pub. For rail, the closest station is High Wycombe station, about 1.8 miles south. Other landmarks nearby include Roald Dahl Museum and Story Centre (3.6 miles north) and Hospital of St John the Baptist (1.9 miles south). Open spaces near Four Ashes include Gomm's Wood.
Landlords, agents and businesses in Four Ashes
We also work for property managers and facilities teams in Four Ashes and across Buckinghamshire. We can quote a run of properties together, and we are fully insured.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.