Reading · England
Sand Mastic in Dunsden Green
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for Dunsden Green, backed by a 12-month guarantee. Ask us for a quote.
- Old cement repairs round a window that have failed
- A silicone bead on a sash window that spoils the look
- Draughts and rain around sash boxes
Sand mastic for homes and businesses in Dunsden Green
We work across Dunsden Green renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand, finished to suit the masonry. Common call-outs are for gaps round a timber door in stone or brick and wind and rain getting in round a sash window, on brick reveals, timber door frames and sash and case windows.
Outdoor sealant needs dry, clean surfaces, so work on frames around Dunsden Green is planned for dry weather. Tell us about access to every side of the house, including upper-floor windows.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Location
- Dunsden Green (RG4)
- Wider area
- Reading
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
What we are called out for in Dunsden Green
Most of it is simply age. Sand mastic is a maintenance item like any pointing, depending on exposure and upkeep.
People usually contact us when they notice something like this:
- Mastic dropping out of the joint
- Patchy fillers round a sash window
- A silicone bead on a sash window that spoils the look
- Mastic worn away on windows facing the weather
If you live in an older home near All Saints Church, the joint between an old wall and a newer frame is generally the first place rain gets in.
What to look for in a quote
- What happens if the job turns out different
- How long to leave it before use
- Whether they seal over old material or remove it
- Who does the work, and how experienced they are
Work for landlords, hotels and businesses
Hotels need rooms back in use, so the work can be planned room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Looking after it afterwards
So the new joints stay in good condition:
- Find out about consent before window work on a listed home
- Avoid heavy scraping on the mastic joint
- Get any rot dealt with first
- Leave the new mastic unpainted
Keep paint scrapers and sanders off the mastic when redecorating. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. Renewing it then is simpler than waiting until it falls out.
Also near Dunsden Green
More services for Dunsden Green
The process
We work through the job in order: protect, prepare, seal, tidy. Typically it takes a few hours per window, depending on the condition of the joints, and the area is left clean. For a village or hamlet like Dunsden Green, the journey is planned in advance: 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.
- 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.
- 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.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Move anything stored near the joints
- Mention any parking rules near the property
Ask for a quote
To get a quote, phone 0345 464 0079 or drop us an email with the location and a short description of the problem. We’ll give you a clear quote before any work starts.
Advice
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs call for the right materials, safe access and experience.
Windows and doors in Dunsden Green
Historic houses like Greys Court (about 3.9 miles north) are a reminder that the area around Dunsden Green has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic. 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.
Letting a property close to Reading station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. Managing a site like St Martin's Catholic Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Dunsden Green is about 1 mile north-east of Caversham, in Reading. Across the RG4 area, we can carry out sand mastic at your property. Dunsden Green is one of 34 towns and villages in Reading where we work.
Postcode districts we cover here for sand mastic: RG4. We also cover Littlestead Green (1 mile west), Play Hatch (1 mile south), Caversham Park Village (1 mile south-west), Emmer Green (1 mile south-west) and Caversham (1 mile south-west). We also work in nearby towns such as Norcot (4 miles south-west), West Reading (4 miles south-west), Tilehurst Within (5 miles south-west), Shinfield (6 miles south), Arborfield Garrison (8 miles south) and Horncastle (5 miles south-west).
Near you in Dunsden Green
Typical jobs here are in homes near Ali's Pond Local Nature Reserve, Highdown School and Sixth Form Centre and The Flowing Spring pub, among other places. The closest station to Dunsden Green is Reading station, roughly 2.6 miles south-west. Other landmarks nearby include Royal Berkshire Hospital (2.8 miles south) and Berkshire Medical Heritage Centre Museum (2.8 miles south). Green spaces nearby include Sonning Hill and South Lake.
What happens if it’s left?
Cement-based fillers and modern sealants don’t always suit a period surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. Around Dunsden Green, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
We do not show prices on the website, because each job is priced on what it involves. Call for a quick quote.
Why us?
- We leave the area clean and tidy
- A 12-month guarantee on all work
- More than 20 years in sealant work
- Experience in homes, commercial sites and hotels
Common questions in Dunsden Green
Is Dunsden Green within the area you cover?
Yes, Dunsden Green is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Reading station?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
When will the new mastic be hard?
It takes a while. It skins first and hardens fully later, and we’ll tell you what to expect.
Can you work on commercial sites?
Yes. Larger jobs can be planned room by room or area by area.
How do I get a quote for sand mastic in Dunsden Green?
Size, access and the old material all affect the cost. Call for a quick quote.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Do you have insurance?
Yes. Full insurance covers our work.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We explain the product when we quote.
When it isn’t the sealant
A few problems are outside what sealant work can do:
- Planning or listed building consent (your local planning authority decides)
- Decayed frames that need repair
- Cracked or broken glass
If you are not sure, just phone 0345 464 0079 or email us and we’ll give you a straight answer before you book.
Surfaces we seal
- Sash and case windows
- Stone surrounds
- Tenement windows
- Brick reveals
- Period & listed homes
- Timber door frames