Oxfordshire · England
Shepherd's Green Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Shepherd's Green and across Oxfordshire. Fully insured, ARBOMaster approved and guaranteed for a year.
- Crumbling sand mastic round a window
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
About our sand mastic in Shepherd's Green
Old sand mastic cracks, crumbles and falls out over time, leaving gaps round the window. We rake it out and renew it and tidies the surround. Common call-outs are for window mastic to renew ahead of painting and cement or filler used on old window joints that has cracked, across sash and case windows, tenement windows and timber door frames.
In a village or hamlet like Shepherd's Green, 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.
Your job is guaranteed for a year, as with all our work.
- Place
- Shepherd's Green (RG9)
- Wider area
- Oxfordshire
- Cover
- 12 months on all our work
- Quotes
- A clear price before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Shepherd's Green
Filling over old, loose mastic does not last. We remove the loose material first so the new mastic stays put. Older cottages and farmhouses around Shepherd's Green can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Instead of a standard rate, we look at what your job involves: the amount of work, the old material and the access. The price is agreed before we begin.
Why us?
- One-year guarantee on every job
- Tidy, careful work
- Anti-fungal sanitary silicone in wet areas
- 4.9 on Google from 180+ five-star reviews
Read what affects the cost and what customers say.
Questions from Shepherd's Green
Can you help a landlord with a rental near Henley-On-Thames station?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. You can call 0345 464 0079 or drop us an email with the details for a clear quote.
Is Shepherd's Green within the area you cover?
Yes. Shepherd's Green is within the area we cover, which takes in towns, villages and rural addresses. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Should I try DIY first?
That depends on the joint. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional, while a short indoor joint may be within reach.
Do you work for hotels and businesses?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. We can talk about working times when we quote.
Is the work guaranteed?
All our work has a 12-month guarantee, and we are fully insured.
Are you an approved applicator?
Yes. We’re an ARBOMaster approved applicator, the approved applicator scheme for Arbo sealants.
Do I need permission for sand mastic on a listed building?
Checking first is sensible. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Will it make a mess?
No. The area is protected while we work and cleaned up afterwards.
What sand mastic looks like in Shepherd's Green
Historic houses like Greys Court (about 0.7 miles east) are a reminder that the area around Shepherd's Green has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic. London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Peppard Church of England Primary School? Then larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Henley-On-Thames station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about. For an older house near a landmark such as Church of St Nicholas, the joint between an old wall and a newer frame is normally the first place rain gets in.
Shepherd's Green is about 5 miles north of Caversham, in Oxfordshire. Anywhere in RG9, we cover sand mastic for homes and businesses. 443 places in Oxfordshire are on our list. We also work in Reading, about 7 miles from Shepherd's Green.
We cover every part of the RG9 postcode area for sand mastic. Sand mastic is available to properties on Shepherds Green and Satwell Close. We also cover Rotherfield Peppard (1 mile south), Highmoor Cross (1 mile north-west), Kingwood Common (1 mile south-west), Peppard Hill (1 mile south-west) and Highmoor (1 mile north-west). We also work in nearby towns such as Didcot (13 miles west), Thame (14 miles north), Henley-on-Thames (3 miles east), Benson (8 miles north-west), Chinnor (11 miles north) and Tilehurst (6 miles south-west).
Local landmarks in Shepherd's Green
Around Shepherd's Green, our work takes us to homes and buildings near Maiden Erlegh Chiltern Edge and The Lamb pub. For rail, the closest station is Henley-On-Thames station, about 3.2 miles east. Well-known places in the area include Frazer Nash Archives (3.4 miles east) and Battle Hospital (6 miles south). The countryside around Shepherd's Green includes Warburg Nature Reserve.
DIY sealant or a professional job?
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. All the old material has to come out first.
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.
What the job involves on each surface
Period and listed homes
Period homes look their best with traditional materials, and sand mastic is one of them.
Sash and case windows
On a sash window, the mastic joint shows on the outside, so a neat, even finish matters.
Aftercare tips
A little care helps the new joints last. We recommend:
- Inspect the joints round the windows every year or so
- Ask the planning authority about consent for listed or conservation-area homes
- Sort the mastic before the decorators arrive
- Take care around the mastic when scraping paint
Avoid painting over the new mastic, which is the traditional advice. Ask us before any decorating around it.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
When something else is needed
We won’t take on work that will not last, so here’s what sealant can’t put right:
- Decayed frames that need repair
- Broken panes
- Sashes that need overhauling
If in doubt, call 0345 464 0079 or send us an email and we will say what we think.
Where we work in Shepherd's Green
- Period & listed homes
- Stone surrounds
- Brick reveals
- Timber door frames
- Tenement windows
- Sash and case windows
How it works
Once we are on site, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours per window, depending on the condition of the joints. For a village or hamlet like Shepherd's 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.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Preparing for the visit
- Let us know about parking restrictions
- Tell us about any water getting in
- Mention if the joints have been sealed before
Getting a quote
For sand mastic in Shepherd's Green, call 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Read more
Towns and villages near Shepherd's Green
More services for Shepherd's Green
Landlord and commercial work in Shepherd's Green
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
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.