Buckinghamshire · England
Sand mastic for sash & case windows in Wendover, Buckinghamshire
Sand mastic across Wendover and nearby, with old sealant always removed completely and a 12-month guarantee.
- Tired mastic found when preparing windows for paint
- Gaps round a timber door in stone or brick
- Mastic dropping out of the joint
Sand mastic for homes and businesses in Wendover
Sand mastic has long been used to fill the joint between timber frames and masonry. It’s made from sand and a linseed-oil-based binder and built up by hand. On period homes, it looks right where silicone wouldn’t. If you’re dealing with mastic that needs renewing before redecorating and wind and rain getting in round a sash window, we can put it right.
In smaller places like Wendover, homes range from older cottages to newer houses, with windows to match: timber, uPVC and aluminium. Each frame material needs the right sealant against the right wall.
A one-year guarantee comes as standard, so you are covered after we’ve gone.
- Place
- Wendover (HP22)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Updated
- 26 October 2026
What sand mastic looks like in Wendover
The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. With historic houses such as Cholesbury Manor House (about 3.9 miles east) nearby, there’s older building stock in the area around Wendover as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Wendover station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like The John Hampden School? Then the mastic around its windows and doors needs looking after like any other building’s.
Wendover is about 5 miles south-east of Aylesbury, in Buckinghamshire. Homes, rented property, offices and hotels in Wendover is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Across Buckinghamshire, we cover 263 places, and Wendover is one of them. Oxford is on our list too, about 21 miles from Wendover.
We cover every part of the HP22 postcode area for sand mastic and the streets around it. Local streets include High Street, The Paddocks and Victory Road. Being close to the A413 and B4009, Wendover is simple for us to get to. Neighbouring places we cover for sand mastic include Halton (1 mile north), Nash Lee (2 miles west), Chalkshire (2 miles west), Terrick (2 miles west) and Weston Turville (2 miles north-west). Larger places within reach include Aylesbury (5 miles north-west), High Wycombe (9 miles south), Chesham (7 miles south-east), Marlow (13 miles south), Amersham (9 miles south-east) and Beaconsfield (12 miles south).
Landmarks near Wendover
In Wendover, that means homes and buildings near John Colet School, Wendover House School and The Pack Horse Public House and the streets around them. Wendover has its own railway station: Wendover station. Other landmarks nearby include Trenchard Museum (1.2 miles north-east) and Stoke Mandeville Hospital (3.4 miles north-west). Not far away are Haddington Hill and Dancersend Nature Reserve.
Keeping the joints in good condition
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask the planning authority about consent for listed or conservation-area homes
- Get any rot dealt with first
- Clear gutters so water does not pour onto the windows
- Look over the window mastic once a year
Look at the mastic when you look over the windows. Small cracks are easier to deal with early.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Signs you need sand mastic in Wendover
Age is the main cause. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
People normally contact us after spotting one of these:
- Wind and rain getting in round a sash window
- Gaps between timber frames and stone or brick
- Crumbling sand mastic round a window
- Modern sealant on a period surround
Homes close to Parish Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- The length of the guarantee
- What product goes in the joint
- How the colour is chosen
- Whether VAT is included
Different surfaces, different methods
Timber door frames
Doors face weather and wear and the mastic can crack early. We rake it out and renew it.
Brick reveals
Sand mastic is also used where timber frames meet brick. It gives a traditional finish.
DIY sealant or a professional job?
Some jobs are best left to a professional: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it fails, we can still redo it.
When it is not the sealant
Some problems need a builder, plumber or other trade rather than us:
- Cracked or broken glass
- Crumbling stone or brickwork round the window
- Sashes that rattle, stick or won’t open
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before you book.
Surfaces we seal
- Sash and case windows
- Timber door frames
- Period & listed homes
- Brick reveals
- Tenement windows
- Stone surrounds
Common questions in Wendover
Will you come out to Wendover?
Yes, Wendover is covered. We work across London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Do you work for landlords with property near Wendover station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned before the sand mastic goes in.
Is there any odour?
Some sealants have a smell while they cure, which fades as it sets. Opening a window helps.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Wendover, along with the rest of our area.
Can I add another job to the visit?
Yes. Just list everything you need and you’ll get one quote.
Do you do commercial work?
Yes. Hotels, offices and other businesses use us, and we’re fully insured.
Do I need permission for sand mastic on a listed building?
Your local planning authority is the one to ask. They’ll tell you if consent is needed.
What we do, step by step
On the day, there’s very little for you to do. 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. In a smaller place like Wendover, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- We check the window surrounds and agree which joints need renewing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- We pack any deep gaps so the mastic sits at the right depth.
- 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.
Before we arrive
- On commercial sites, let us know about site rules
- Tell us about any water getting in
- Where the joints are inside, avoid wetting them before we arrive
How to get a quote
If you are in Wendover and need sand mastic, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
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Work for landlords, hotels and businesses
We also work for property managers and facilities teams in Wendover and across Buckinghamshire. We can quote a run of properties together.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.