Buckinghamshire · England
Sand mastic for sash & case windows in Dinton, Buckinghamshire
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Dinton. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Tired mastic found when preparing windows for paint
- Weathered mastic on the most exposed windows
- Modern sealant on a period surround
Sand mastic for homes and businesses in Dinton
We renew sand mastic around sash windows and doors in stone and brick. The old mastic is raked out, and new mastic is applied and shaped by hand. We are often asked to deal with failed mastic on an exposed elevation and tired mastic found when preparing windows for paint, across brick reveals, sash and case windows and period & listed homes.
Homes in small places like Dinton often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Whatever the size of the job, you get the same one-year guarantee.
- Location
- Dinton (HP17)
- Wider area
- Buckinghamshire
- Cover
- 12 months on all our work
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Why deal with it now?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Older cottages and farmhouses around Dinton can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Leaving a failed joint normally makes the job bigger, not smaller, as water and mould keep getting in. If you are not sure whether it needs doing, phone 0345 464 0079 or drop us an email for an honest opinion and a quote.
Why choose Mr Mastic in Dinton
- Quality sealants from Arbo and Everbuild
- A 12-month guarantee on all work
- Old sealant always removed completely
- 180+ five-star Google reviews
Take a look at how sealant jobs are priced and our reviews.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Clear gutters so water does not pour onto the windows
- Sort the mastic before the decorators arrive
- Avoid heavy scraping on the mastic joint
- Leave the new mastic unpainted
Leave the new mastic unpainted, as traditional guidance advises. If you’re redecorating, ask us first.
An open joint round the box lets weather through. Left, the gap tends to get bigger.
DIY sealant or a professional job?
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
What sealant work can’t fix
Before booking, it’s worth knowing the limits too:
- Timber that has rotted
- Cracked or broken glass
- Crumbling stone or brickwork round the window
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think before booking.
Where we work in Dinton
- Timber door frames
- Brick reveals
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Tenement windows
Different surfaces, different methods
Sash and case windows
Most of our sand mastic work is on sash windows. Each joint round the box is raked out and renewed.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Also in Dinton
The process
Most of a good job is in the preparation, and we don’t rush it. Joints are cleaned back and dried before anything new goes in. In total, it generally takes a few hours for a single window, longer for several. Somewhere like Dinton 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.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
Getting ready for the visit
- Keep pets and children clear of the area while we work
- Mention any parking rules near the property
- Clear items away from the joints we are working on
Get a quote
If you are in Dinton and need sand mastic, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and you will get a clear quote before we start.
Related advice
Frames and glazing around Dinton
With historic houses such as Waddesdon Manor (about 4 miles north-west) nearby, there’s older building stock in the area around Dinton 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. The South East is one of the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Homes close to Church of Saints Peter and Paul include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. Letting a property close to Haddenham & Thame Parkway station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Dinton is about 4 miles south-west of Aylesbury, in Buckinghamshire. From the centre of Dinton to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. Dinton is one of 263 towns and villages in Buckinghamshire where we work. Oxford is on our list too, about 15 miles from Dinton.
Work in HP17 is quoted and booked the same way as anywhere else. You will find streets such as High Street, Stars Lane and New Road. Close by, we work in Upton (1 mile north-east), Ford (1 mile south-east), Sedrup (2 miles east), Bishopstone (3 miles east) and Ilmer (3 miles south). Further out, we also cover Aylesbury (4 miles north-east), High Wycombe (13 miles south-east), Chesham (13 miles south-east), Buckingham (15 miles north), Amersham (15 miles south-east) and Elmhurst (4 miles north-east).
Landmarks near Dinton
We work in homes and buildings around The Seven Stars Public House, among other places. Dinton’s nearest station is Haddenham & Thame Parkway station, roughly 2.4 miles south-west of the centre. Well-known places in the area include Roald Dahl Children's Gallery (3.9 miles north-east) and Dinton Castle (0.5 miles north). Green spaces nearby include Snakemoor.
Quotes for sand mastic in Dinton
We do not publish a price list, because jobs vary so much. The quote depends on:
- How many areas need sealing
- Access and height
- Mould in or behind the old joints
- The type of sealant required
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You will know the price before we begin.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Pictures of the joints, sent by email
- How many joints, rooms or windows are involved
- How we’d reach the joints
- Any previous sealing or DIY work
We don’t publish a price list, because every job is different. Instead, we send you a clear quote for your job. To arrange one, phone 0345 464 0079 or email us.
Dinton questions
Can you help a landlord with a rental near Haddenham & Thame Parkway station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can ring 0345 464 0079 or send us an email with the details for a clear quote.
Will you come out to Dinton?
Yes, Dinton is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is consent needed for window work on a listed home?
Yes, it’s worth checking. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
Will the old sealant be removed?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
Is the work guaranteed?
There’s a 12-month guarantee on every job.
Will you leave a mess?
No. The area is protected while we work and cleaned up afterwards.
Is it worth trying it myself?
You can, for simple jobs. Preparation is everything: all the old sealant out, and a clean, dry joint. We can always put it right if it fails.
Do you hold any approvals?
Yes. We are approved under the ARBOMaster scheme, which is run for the Arbo sealant brand.