Oxfordshire · England
Sand Mastic in Streatley
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Streatley and across Oxfordshire. ARBOMaster approved applicators, fully insured, with a 12-month guarantee.
- Gaps where the frame meets the masonry
- Silicone on a period window that looks wrong
- Patchy fillers round a sash window
Different surfaces, different methods
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we will confirm what’s needed.
Period and listed homes
A traditional finish suits a period property.
Sand mastic in Streatley
A silicone bead around a sash window can look out of place and is not always the right material. Sand mastic is the traditional choice, and we can replace one with the other. If you have mastic that needs renewing before redecorating and mastic dropping out of the joint, we can help.
Around Streatley, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
Whatever the size of the job, you get the same 12-month guarantee.
- Place
- Streatley (RG8)
- Region
- Oxfordshire
- Guarantee
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Why it’s worth doing now in Streatley
Before painting the windows, it pays to renew the mastic. Painting over failed mastic doesn’t seal it and traditional guidance is to leave the new mastic unpainted. Where a wall is exposed, as many are in small places like Streatley, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
Doing several joints on one visit usually makes better use of the time than several visits. We will give you a clear price for the lot.
Why choose Mr Mastic in Streatley
- Approved under the ARBOMaster scheme
- Any old sealant cut out fully, not covered over
- A 12-month guarantee on all work
- Over 20 years’ experience
Take a look at how sealant jobs are priced or what customers say.
What happens on the day
There is not much for you to do on the day. Point us to the joints and we will get on with it. The work itself takes a few hours per window, depending on the condition of the joints. Somewhere like Streatley needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- The mastic is mixed, pressed into the joint by hand and shaped.
- The mastic is finished to sit tidily against the stone or brick.
Preparing for the visit
- Let us know about earlier repairs to the joints
- Keep pets and children clear of the area while we work
- Mention any sign-in or site rules at work premises
Ask for a quote
Getting a quote is simple: tell us what needs doing and where, and roughly how big it is. A few pictures by email make the job easier to understand.
Advice
Frames and glazing around Streatley
With historic houses such as Basildon Park (about 2.1 miles south-east) nearby, there’s older building stock in the area around Streatley as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. 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.
In the older streets around Church of St Mary, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Letting a property close to Goring & Streatley station? Then older sash windows in a rental need their mastic kept sound to keep the weather out. For site and facilities teams at buildings such as Streatley C.E. Voluntary Controlled School, larger buildings have plenty of frames, and the mastic around each one ages.
Streatley is about 7 miles south-east of Didcot, in Oxfordshire. From the centre of Streatley to the outskirts, we cover sand mastic for every kind of property. We cover 443 towns and villages across Oxfordshire. You can also see our page for Reading, roughly 9 miles from Streatley.
Every address in RG8 is covered for sand mastic. You will find streets such as High Street, Streatley Hill and The Bull Meadow, and we cover them all. Other places close to Streatley include Goring (1 mile east), Lower Basildon (2 miles south-east), South Stoke (2 miles north), Moulsford (2 miles north) and Elvendon (2 miles east). Larger places within reach include Didcot (7 miles north-west), Abingdon-on-Thames (12 miles north-west), Wantage (13 miles west), Henley-on-Thames (11 miles east), Grove (13 miles north-west) and Benson (7 miles north).
What’s near Streatley
We work in homes and buildings around The Bull Hotel and the streets around them. For rail, the closest station is Goring & Streatley station, about 0.8 miles east. A little further out are Yattendon Castle (4.5 miles south-west). Green spaces nearby include Withymead Nature Reserve and Churn Hill.
Nearby places to Streatley
Also in Streatley
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask the planning authority about consent for listed or conservation-area homes
- Ask a joiner to look at soft timber first
- Keep modern sealant off the mastic
- Take care around the mastic when scraping paint
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Gaps round a sash box let in draughts and rain. The longer it’s left, the more the joint opens.
Common questions in Streatley
Do you cover smaller places like Streatley?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Just mention lanes, gates or anything else about the route when you book.
Can you help a landlord with a rental near Goring & Streatley station?
Yes. We work for landlords and letting agents as well as householders, and several properties can go on one quote. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How much does sand mastic cost in Streatley?
Every job is different, so each one gets its own quote. To get one, ring 0345 464 0079 or email us and tell us what needs doing and where.
Where do you work from?
We work from Crawley. Our applicators cover Streatley.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
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.
Should I check with the council before work on a listed or conservation-area home?
Yes, it’s worth checking. Ask your local planning authority whether consent is needed for work on a listed home or in a conservation area.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
For landlords and businesses
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements.
Whether it’s one flat or a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Honest limits
Before you book, it’s worth knowing the limits too:
- Putty and glazing repairs
- Planning or listed building consent (your local planning authority decides)
- Crumbling stone or brickwork round the window
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly.
Where we work in Streatley
- Brick reveals
- Timber door frames
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows