Buckinghamshire · England
Sand Mastic in Wendover Dean
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Wendover Dean. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic dropping out of the joint
- Open joints round the window box
- Cracked mastic round a front door frame
How it works
On the day, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for a single window, longer for several. In a small place like Wendover Dean, access is normally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- First, we look at the surrounds with you and agree what needs doing.
- The loose and crumbling mastic is raked out and the joint cleaned.
- 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.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Tell us about any previous sealing or DIY attempts
How to get a quote
Getting a quote is simple: let us know the job and the location. A few photos by email make the job easier to understand, and we will take it from there.
Advice
About our sand mastic in Wendover Dean
Sand mastic suits most period window surrounds. Newer frames usually get a flexible sealant instead and we will explain which is best for yours. We work on timber door frames, stone surrounds and tenement windows, and people most often call us about patchy fillers round a sash window and gaps where the frame meets the masonry.
Around Wendover Dean, many homes face open ground, so their windows and doors take the full weather. That exposure dries out and cracks the mastic around frames and sills faster.
We stand behind the work with a one-year guarantee.
- Where
- Wendover Dean (HP22)
- Region
- Buckinghamshire
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Towns and villages near Wendover Dean
Also in Wendover Dean
FAQs for Wendover Dean
Is Wendover Dean within the area you cover?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
I let a flat near Wendover station. Can you help?
Yes, rental work is part of what we do. Just ring 0345 464 0079 or email us and tell us about the property, and we’ll give you a clear price.
Are you ARBOMaster approved?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Is the work guaranteed?
All our work has a one-year guarantee, and we’re fully insured.
Do you do commercial work?
Yes. Larger jobs can be planned room by room or area by area.
Can new sealant go over the old?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Should I try DIY first?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Is there any odour?
Some sealants have a smell while they cure, but it fades. Ventilation helps.
Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
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. All the old material has to come out first.
When to call us in Wendover Dean
Rain on the window surround works into any crack and loosens it further. Windows facing the weather tend to go first.
The problems people normally mention when they call include:
- Open joints round the window box
- Draughts and rain around sash boxes
- Gaps round a timber door in stone or brick
- Mastic that needs renewing before redecorating
Managing a site like John Colet School? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- Whether you can choose the colour
- What the cure time is
- Whether they seal over old material or remove it
- Is VAT in the price?
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Whether work needs listed building consent
- Timber that has rotted
- Putty and glazing repairs
If in doubt, call 0345 464 0079 or send us an email and we’ll say what we think.
Where we work in Wendover Dean
- Brick reveals
- Timber door frames
- Stone surrounds
- Sash and case windows
- Tenement windows
- Period & listed homes
Landlord and commercial work in Wendover Dean
We also work for businesses, from offices to washrooms and kitchens. For commercial premises, we can talk through working times when we quote.
For anyone letting property in or around Wendover Dean, several properties can go on one quote. Just tell us the addresses and what each one needs.
How to look after the new joints
A little care helps the new joints last. We recommend:
- Keep modern sealant off the mastic
- Find out about consent before window work on a listed home
- Ask a joiner to look at soft timber first
- Avoid heavy scraping on the mastic joint
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
What sand mastic looks like in Wendover Dean
With historic houses such as Cholesbury Manor House (about 3.5 miles north-east) nearby, there’s older building stock in the area around Wendover Dean as well as newer homes. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that’s 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.
For landlords with property near Wendover station, older sash windows in a rental need their mastic kept sound to keep the weather out. Cholesbury Manor House, about 3.5 miles north-east, is one of the historic houses in the wider area around Wendover Dean.
Wendover Dean is about 5 miles west of Chesham, in Buckinghamshire. For sand mastic in and around Wendover Dean, it’s easy to get a quote: please ring 0345 464 0079 or email us. We’re based in Crawley and cover Buckinghamshire. Wendover Dean is one of 263 towns and villages in Buckinghamshire where we work for sand mastic. For nearby work, see our Reading page.
We cover every part of the HP22 postcode area for sand mastic and the streets around it. Local streets include London Road and Cobblershill Lane, and we cover them all. Neighbouring places we cover for sand mastic include Kingsash (1 mile north-east), Lee Gate (1 mile east), Hunt's Green (1 mile south-east), Wendover (2 miles north) and Great Missenden (2 miles south-east). Further out, we also cover Aylesbury (7 miles north-west), High Wycombe (7 miles south), Chesham (5 miles east), Marlow (11 miles south), Amersham (7 miles south-east) and Beaconsfield (9 miles south).
Around Wendover Dean
In Wendover Dean, that means homes and buildings near The Firecrest pub and the streets around them. The nearest railway station is Wendover station, roughly 2 miles north-west of the centre. A little further out are Chiltern Hospital (3.4 miles south-east) and Little Kimble Motte (3.3 miles west). Open spaces near Wendover Dean include Coombe Hill and Dancersend Nature Reserve.
Leave it or put it right?
Before painting the windows, it pays to renew the mastic. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Older cottages and farmhouses around Wendover Dean can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why Wendover Dean customers choose us
- We are fully insured
- 20+ years of sealant experience
- Tidy, careful work
- We never seal over old sealant
Take a look at our cost guide or what customers say.