Buckinghamshire · England
Sand mastic for sash & case windows in Hardwick, Buckinghamshire
Sand mastic across Hardwick and nearby, with every bit of old sealant taken out first.
- Failed mastic on an exposed elevation
- Gaps where the frame meets the masonry
- Gaps round a timber door in stone or brick
About our sand mastic in Hardwick
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It’s a good fit for period properties, where modern sealant can look out of place. Common call-outs are for draughty sash windows at the surround and mastic that needs renewing before redecorating, on sash and case windows, brick reveals and timber door frames.
Somewhere as small as Hardwick, older homes often have timber frames set in stone or brickwork. Not every older frame suits a modern silicone bead, so the sealant has to be chosen to suit the building.
Our work is backed for twelve months, in Hardwick and everywhere else we cover.
- Place
- Hardwick (HP22)
- Wider area
- Buckinghamshire
- Guarantee
- A year, on every job
- Quote
- A clear price before any work starts
- Call
- 0345 464 0079
- Updated
- 26 October 2026
DIY versus a professional finish
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.
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 something else is needed
Before booking, it’s worth knowing the limits too:
- Planning or listed building consent (your local planning authority decides)
- Masonry that needs repairing
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Where we work in Hardwick
- Timber door frames
- Tenement windows
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Brick reveals
Common questions in Hardwick
Do you work for landlords with property near Aylesbury Vale Parkway station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before we start.
Is Hardwick 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.
What’s sand mastic made of?
It’s the traditional filler for the joint round timber windows and doors. It’s made with sand and a linseed-oil-based binder.
Do you hold any approvals?
Yes. We are an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Is it possible to take out silicone and use sand mastic instead?
Usually, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Can you do several jobs on one visit?
Yes. Tell us about everything you’d like done and we will quote it together.
What do you need from me for a quote?
Only a few details: the address or postcode, what’s wrong and any access issues. Then ring 0345 464 0079 or drop us an email.
What sealant do you use?
The product depends on the job: sanitary silicone where it gets wet, and sealants suited to movement or weather elsewhere. Brands we use include Arbo and Everbuild.
Also near Hardwick
More services for Hardwick
How the job changes by surface
Timber door frames
A neat sand mastic joint round a front door suits a period home.
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
For landlords and businesses
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Housing providers, facilities teams and property managers book us too. We can quote a run of properties together.
What we do, step by step
Before we leave, we go over the finished joints with you. The visit itself usually takes a few hours per window, depending on the condition of the joints, depending on the amount of work. Somewhere as small as Hardwick, access is often the only tricky part. For outside work, also let us know about exposed walls and any outbuildings involved.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
Getting a quote
For a quote, phone 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before we start.
Advice
Keeping the joints in good condition
Once the sealant has cured, a few habits help it last:
- Have rotten timber repaired before new mastic goes in
- Sort the mastic before the decorators arrive
- Look over the window mastic once a year
- Avoid heavy scraping on the mastic joint
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry, so renewing it early is worth it.
Windows and doors in Hardwick
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Waddesdon Manor (about 4.8 miles west) are a reminder that the area around Hardwick has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Aylesbury Vale Parkway station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Managing a site like Old School Room Chapel? Then the mastic around its windows and doors needs looking after like any other building’s.
Hardwick is about 3 miles north of Aylesbury, in Buckinghamshire. We provide sand mastic to homes and businesses in Hardwick and nearby, as part of our work across Buckinghamshire. Hardwick is one of 263 towns and villages in Buckinghamshire where we work for sand mastic. There’s also a page for Oxford, roughly 19 miles from Hardwick.
We cover every part of the HP22 postcode area for sand mastic and the streets around it. Neighbouring places we cover for sand mastic include Weedon (1 mile south-east), Whitchurch (1 mile north), Oving (2 miles north-west), Pitchcott (2 miles north-west) and Watermead (2 miles south-east). We also work in nearby towns such as Aylesbury (3 miles south), Chesham (14 miles south-east), Buckingham (11 miles north-west), Elmhurst (3 miles south), Southcourt (4 miles south) and Princes Risborough (10 miles south).
Near you in Hardwick
Locally, jobs take us to homes and businesses close to The Bell pub and the streets around them. For rail, the closest station is Aylesbury Vale Parkway station, about 2.6 miles south-west of the centre. Other landmarks nearby include Friars Square (3.5 miles south) and Roald Dahl Children's Gallery (3.3 miles south).
What we are called out for in Hardwick
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
The most common problems we see are:
- Gaps between timber frames and stone or brick
- Patchy fillers round a sash window
- Mastic dropping out of the joint
- Modern sealant on a period surround
For an older house near a landmark such as Church of St Mary, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Comparing quotes
- What happens if they find a problem under the old sealant
- Who does the work, and how experienced they are
- How the colour is chosen
- Is the old sealant removed completely?