Buckinghamshire · England
Sand mastic for sash & case windows in Granborough, Buckinghamshire
Sand mastic across Granborough and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- Failed mastic on an exposed elevation
- Mastic dropping out of the joint
- Draughty sash windows at the surround
How we quote for sand mastic
There’s no set price list. The quote depends on:
- The number of rooms or windows
- Whether there’s mould to deal with
- Whether old sealant or filler has to be cut out
- Which sealant suits the joint
Some things make a job bigger or smaller: the old material and how easily it comes out, whether mould needs treating, and whether we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
You do not need to know the technical terms. It helps if you can tell us:
- Photos by email, if that is easy
- How we’d reach the joints
- Where the property is
- The problem you’ve noticed
There’s no standard price list, because every job is different. Instead, we give you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.
Sand mastic for homes and businesses in Granborough
Burnt sand mastic is a traditional material blends with stone and brick surrounds. It suits period and listed homes, where modern sealant can look out of place. If you have weathered mastic on the most exposed windows and tired mastic found when preparing windows for paint, we can put it right, on timber door frames, brick reveals and tenement windows alike.
In a village or hamlet like Granborough, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
All of our work is guaranteed for twelve months, and the guarantee is the same wherever you are.
- Location
- Granborough (MK18)
- Region
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why deal with it now?
Silicone might seem the quicker option, but it can look wrong on a period surround. Sand mastic is the traditional material and blends with the stone or brick. In a small place like Granborough, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Every job is a little different, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What you get with us
- Neat joints and a tidy finish
- Anti-fungal sanitary silicone in wet areas
- 20+ years of sealant experience
- ARBOMaster approved applicator
See our cost guide and customer reviews.
Should I try it myself first?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. Everything old must be removed first.
Windows and doors in Granborough
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. With historic houses such as Claydon House (about 2.9 miles west) nearby, there’s older building stock in the area around Granborough 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.
If you live in an older home near Church of St John the Baptist, the joint between an old wall and a newer frame is usually the first place rain gets in.
Granborough is about 7 miles south-east of Buckingham, in Buckinghamshire. Every kind of property in Granborough is covered for sand mastic, old or new, large or small. The work is guaranteed for a year. Granborough is one of 263 towns and villages in Buckinghamshire we cover for sand mastic. There’s also a page for Oxford, roughly 19 miles from Granborough.
Postcode districts we cover here for sand mastic: MK18. Whether your property is on Marks Orchard, Winslow Road and Sovereign Close or anywhere close by, our applicators can take on the job. We also cover the places around Granborough: Winslow (2 miles north), Swanbourne (3 miles north-east), Dunton (3 miles east), Great Horwood (4 miles north) and Mursley (4 miles north-east). Further out, we also cover Aylesbury (8 miles south-east), Buckingham (7 miles north-west), Elmhurst (7 miles south-east), Southcourt (9 miles south), Princes Risborough (14 miles south) and Haydon Hill (7 miles south).
What’s near Granborough
Typical jobs here are in homes near The Crown pub. Other landmarks nearby include Bolbec Castle (3.4 miles south-east).
How the visit works
On the day, there’s very little for you to do. Show us the job and we’ll take it from there. The work itself takes anything from a few hours to a full day, depending on how many windows. Somewhere like Granborough 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 look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Keep children and pets away from the work area
- For indoor joints, keep the area dry beforehand if you can
- Tell us about any water getting in
Getting a quote
To get a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. You’ll have a clear quote before we start.
Related advice
Towns and villages near Granborough
More services for Granborough
FAQs for Granborough
What guarantee comes with sand mastic in Granborough?
Every job comes with our 12-month guarantee, wherever it is. We are also fully insured and ARBOMaster approved.
Will you come out to Granborough?
Yes, we do. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Can you replace silicone on a period window with sand mastic?
In most cases. The silicone is cut out and the joint cleaned, then point it with sand mastic.
Are you fully insured?
Yes, we’re fully insured for every job we do.
I’m a tenant. Can you help?
We are happy to deal with the tenant, landlord or agent. Get your landlord’s agreement first.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
Can landlords and businesses book you?
Yes, often. We can quote for several properties at once.
Are you an approved applicator?
Yes. We are an ARBOMaster approved applicator.
When to call us in Granborough
Paint, silicone or cement used over old mastic causes problems. They don’t move with the timber and we normally remove them.
If you can see any of these, it’s time to have the joints looked at:
- Mastic round period door frames that has failed
- Window mastic to renew ahead of painting
- A silicone bead on a sash window that spoils the look
- Gaps between timber frames and stone or brick
Managing a site like Sir Thomas Fremantle School? Then the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- How hidden problems are handled
- Are they insured?
- How long the guarantee is
- How the surfaces are prepared before sealing
Landlord and commercial work in Granborough
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
For anyone letting property in or around Granborough, jobs at different addresses can be quoted together. Send us the addresses and the work at each, and pictures by email help.
How the job changes by surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Like-for-like sand mastic is normally favoured.
Timber door frames
Doors face weather and wear and the mastic can crack early. We rake it out and renew it.