Buckinghamshire · England
Sand mastic for sash & case windows in Upton, Buckinghamshire
Problem with your window and door surrounds in Upton? We cut out the old, prepare the joints and apply the right sealant.
- Mastic round period door frames that has failed
- Weathered mastic on the most exposed windows
- A silicone bead on a sash window that spoils the look
Surface by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We work on single windows or whole elevations.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
Sand mastic in Upton
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We work on stone surrounds, tenement windows and timber door frames, and people most often call us about mastic worn away on windows facing the weather and open joints round the window box.
Homes in small places like Upton 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.
Every job comes with our one-year guarantee, wherever you are in Buckinghamshire.
- Place
- Upton (HP17)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant cannot fix:
- Crumbling stone or brickwork round the window
- Whether work needs listed building consent
- Cracked or broken glass
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Timber door frames
- Period & listed homes
- Tenement windows
- Sash and case windows
- Stone surrounds
What we do, step by step
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. We protect the surfaces around the joints before we start. Most jobs take a few hours per window, depending on the condition of the joints. In a small place like Upton, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- 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.
Before we arrive
- Plan for the work area to be out of bounds to pets and children
- Let us know about earlier repairs to the joints
- Let us know about parking restrictions
How to get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints, and add pictures by email if you can.
Related advice
Quotes for sand mastic in Upton
Your quote is based on your job. We look at:
- The size of the job
- Any mould that needs treating
- How easy the joints are to reach
- The product the joint needs
Doing several joints on one visit usually makes better use of the time than several visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Helping us quote
Photos help, but a description is a good start. Please mention:
- A few photos by email, if you can
- How we’d reach the joints
- Where the job is, and your postcode
- Any previous sealing or DIY work
Want a quote for sand mastic? Please phone 0345 464 0079 or email us with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
Upton: your questions answered
Do you cover Upton for sand mastic?
Yes, Upton is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing, and we’ll give you a clear quote.
Is Upton within the area you cover?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
How long will you be here?
It depends on the size of the job, but most jobs take a few hours for a single window, longer for several. We’ll give you a better idea when we quote.
Can you seal over the old sealant?
No. We remove every bit of old sealant first.
Do you work for letting agents?
Yes, often. We can quote for several properties at once.
Do I need to be at home?
That depends on where the joints are. Inside work needs someone to give us access.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Can you quote for more than one area?
Yes, and it often makes sense. Doing several areas at once is normally more efficient, so mention them when you ask for a quote.
Windows and doors in Upton
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. With historic houses such as Waddesdon Manor (about 3.9 miles north-west) nearby, there’s older building stock in the area around Upton 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’s traditional sand mastic.
Managing a site like Stone Church of England Combined School? Then its window and door frames need their mastic kept sound, just like a home’s. 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. Rented homes near Aylesbury Vale Parkway station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out.
Upton is about 3 miles south-west of Aylesbury, in Buckinghamshire. Every kind of property in Upton can book us for sand mastic. Every job comes with our 12-month guarantee. Across Buckinghamshire, we cover 263 places, Upton among them. We also work in Oxford, around 15 miles away.
Every address in HP17 is within our area for sand mastic. Local streets include Homestead Close, Lower Farm Gate and Upton Road, all of which we cover. We also cover the places around Upton: Dinton (1 mile south-west), Ford (1 mile south), Sedrup (2 miles east), Bishopstone (2 miles east) and Walton Court (3 miles east). Within a short drive, we also cover Aylesbury (3 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).
Local landmarks in Upton
Typical jobs here are in homes near The Seven Stars Public House. For rail, the closest station is Aylesbury Vale Parkway station, about 2.5 miles north of the centre. Well-known places in the area include Roald Dahl Children's Gallery (3.2 miles north-east) and St John's Hospital (within half a mile north-east). For a walk, there’s Snakemoor.
For landlords and businesses
For anyone letting property in or around Upton, jobs at different addresses can go on one quote. Just tell us the addresses and what each one needs.
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance that we can handle for you.
What happens if it’s left?
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Older cottages and farmhouses around Upton can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A failed joint rarely gets cheaper to fix by waiting. If you are unsure, ring 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why choose Mr Mastic in Upton
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- 12-month guarantee on every job
- More than 20 years in sealant work
Take a look at our cost guide and our reviews.
DIY sealant or a professional job?
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.