Buckinghamshire · England
Sand mastic for sash & case windows in Rowsham, Buckinghamshire
Window and door surrounds in Rowsham need attention? We cut out the old, prepare the joints and apply the right sealant.
- Modern sealant on a period surround
- Cracked mastic round a front door frame
- Wind and rain getting in round a sash window
How we handle sand mastic in Rowsham
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. If you are dealing with old cement repairs round a window that have failed and tired mastic found when preparing windows for paint, we can put it right.
In a village or hamlet like Rowsham, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Rowsham (HP22)
- Wider area
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Rowsham
Do you cover Rowsham for sand mastic?
Yes. We work across London and the South East, and Rowsham is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear price.
Is Rowsham within the area you cover?
Yes, Rowsham is covered. 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.
Can I do it myself?
Sometimes. Preparation is everything: all the old sealant out, and a clean, dry joint. If it does not work out, we can redo it.
Can new sealant go over the old?
No. New silicone will not bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
Where are you based?
Our base is in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
What do you need from me for a quote?
Tell us what needs doing and where. We will ask anything else we need to know.
Can I add another job to the visit?
Yes. Tell us about everything you’d like done and you will get one quote.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
If you’re set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
When to call us in Rowsham
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber, and they generally need raking out.
The problems people normally mention when they call are:
- Gaps between timber frames and stone or brick
- Modern sealant on a period surround
- Window mastic to renew ahead of painting
- Draughty sash windows at the surround
For an older house near a landmark such as Church of All Saints, the joint between an old wall and a newer frame is generally the first place rain gets in.
Comparing quotes
- Who turns up on the day
- Whether all the old sealant comes out first
- How the surfaces are prepared before sealing
- Whether the sealant suits the joint
What we can’t put right
New sealant can’t fix everything, and we’d rather say so up front. Sealant will not put right:
- Masonry that needs repairing
- Whether work needs listed building consent
- Sash cords, weights and draught-proofing of the sashes
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Period & listed homes
- Sash and case windows
- Timber door frames
- Brick reveals
- Stone surrounds
- Tenement windows
Towns and villages near Rowsham
Other services in Rowsham
How the job changes by surface
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
Timber door frames
Sand mastic is used round timber door frames too. The method is the same as for windows.
Work for landlords, hotels and businesses
We work for letting agents and landlords as well as homeowners. Sealant work between tenants keeps a property looking cared for.
We also work for property managers and facilities teams. We can quote a run of properties together, and we’re fully insured.
What happens if it’s left?
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps and traditional guidance is to leave the new mastic unpainted. Around Rowsham, older homes often have timber in their floors and frames, and water through a failed joint can rot timber if it’s left.
Doing several joints on one visit is usually more efficient than separate visits, so tell us about everything that needs sealing. You’ll get one clear quote for the whole job.
Why Rowsham clients choose us
- Sanitary silicone with an anti-fungal additive in wet areas
- Approved under the ARBOMaster scheme
- 4.9 on Google from 180+ five-star reviews
- Any old sealant cut out fully, not covered over
Take a look at our cost guide or customer reviews.
Rowsham homes and the weather
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Ascott House (about 3.8 miles north-east) nearby, there’s older building stock in the area around Rowsham as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you let a flat or house near Aylesbury station, cracked sand mastic around sash windows lets in the draughts tenants complain about. For site and facilities teams at buildings such as Wingrave Church of England Combined School, the mastic around its windows and doors needs looking after like any other building’s.
Rowsham is about 3 miles north-east of Aylesbury, in Buckinghamshire. Every kind of property in Rowsham is covered for sand mastic. The work is guaranteed for a year. Rowsham is one of 263 towns and villages in Buckinghamshire where we work. For nearby work, see our Oxford page, about 21 miles away.
All of HP22 is within our area for sand mastic, from the main roads to the quietest streets. Whether your property is on Bennetts Lane and Manor Road or a nearby road, we can help. Nearby, we also carry out sand mastic in Wingrave (1 mile north-east), Aston Abbotts (1 mile north), Bierton (2 miles south-west), Burcott (2 miles south) and Broughton (2 miles south). We also work in nearby towns such as Aylesbury (3 miles south-west), Chesham (12 miles south-east), Buckingham (14 miles north-west), Amersham (14 miles south-east), Elmhurst (3 miles south-west) and Southcourt (4 miles south-west).
Near you in Rowsham
We work in homes and buildings around MacIntyre School, among other places. The closest station to Rowsham is Aylesbury station, about 3.5 miles south-west of the centre. Well-known places in the area include Bolbec Castle (3.6 miles north-west) and Tindal Centre (2.7 miles south-west).
The process
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and clear up. It generally takes a few hours per window, depending on the condition of the joints. Somewhere like Rowsham needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
How to get a quote
For a quick quote, get us on the phone, or email us if that is easier. Describe what needs sealing and we will explain what’s involved before giving you a price.