Oxfordshire · England
Ashampstead Green Sand Mastic
Sand mastic for Ashampstead Green, by sealant specialists with 20+ years’ experience. Rated 4.9 on Google from 180+ five-star reviews.
- Mastic that needs renewing before redecorating
- Wind and rain getting in round a sash window
- Gaps round a timber door in stone or brick
Sand mastic for homes and businesses in Ashampstead Green
Sand mastic doesn’t last for ever, leaving gaps round the window. We rake it out and renew it so the surround looks right again. If you have mastic worn away on windows facing the weather and tired mastic found when preparing windows for paint, we can put it right, on brick reveals, stone surrounds and sash and case windows alike.
Outdoor sealant needs dry, clean surfaces, so work on frames around Ashampstead Green is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Every job is covered by a 12-month guarantee.
- Where
- Ashampstead Green (RG8)
- Wider area
- Oxfordshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Should I try it myself first?
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
A careful DIYer can reseal a simple joint, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
How to look after the new joints
So the new joints stay in good condition:
- Ask the planning authority about consent for listed or conservation-area homes
- Keep modern sealant off the mastic
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Frames and glazing around Ashampstead Green
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Basildon Park (about 2.9 miles east) nearby, there’s older building stock in the area around Ashampstead Green 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’s traditional sand mastic.
Rented homes near Goring & Streatley station change hands often, and 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 Clement, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Ashampstead Green is about 7 miles north-east of Thatcham, in Oxfordshire. Whether you’re in the middle of Ashampstead Green or further out, we cover sand mastic for every kind of property. Our Oxfordshire coverage runs to 443 places, and Ashampstead Green is one of them. Our Reading page covers work nearby, about 10 miles away.
All of RG8 is within our area for sand mastic, from the main roads to the quietest streets. Close by, we work in Ashampstead (1 mile south), Stubbles (1 mile south-east), Burnt Hill (2 miles south), Upper Basildon (2 miles east) and New Town (3 miles east). Within a short drive, we also cover Didcot (9 miles north), Abingdon-on-Thames (13 miles north), Wantage (12 miles north-west), Henley-on-Thames (12 miles east), Grove (13 miles north-west) and Benson (10 miles north).
Near you in Ashampstead Green
The nearest railway station is Goring & Streatley station, about 3.1 miles north-east of the centre. Nearby you’ll also find Yattendon Castle (1.8 miles south-west). Not far away are Hartslock.
What we do, step by step
All our tools and materials come with us in the van. After a quick look at the joints together, we protect the area and start. Most jobs take a few hours per window, depending on the condition of the joints. Somewhere as small as Ashampstead Green, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- For business premises, tell us about site rules or sign-in
- Let us know about parking restrictions
How to get a quote
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you’re ready, call 0345 464 0079 or send us an email.
Advice
For landlords and businesses
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.
Letting agents often deal with us directly. Send the address, what’s needed and the access arrangements and we will give you a quote.
What affects the quote in Ashampstead Green
There’s no set price list, because jobs vary so much. What we look at:
- Any mould that needs treating
- Which sealant suits the joint
- Any working-time requirements on site
- How many rooms, windows or areas are involved
Some things make a job bigger or smaller: the old material and how easily it comes out, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Access, such as stairs, a lift or height
- If someone has resealed it before
- What’s wrong with the joints now
- A few pictures by email, if you can
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. A few photos by email make the job easier to understand, and we’ll come back to you with a quote.
Leave it or put it right?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. In a small place like Ashampstead Green, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
There are no prices on our website, because each job is priced on what it involves. For a quick quote, please ring 0345 464 0079 or email us.
Why choose Mr Mastic in Ashampstead Green
- Domestic, commercial and hotel work
- Tidy, careful work
- Sanitary silicone with an anti-fungal additive in wet areas
- 4.9 on Google from 180+ five-star reviews
Take a look at how sealant jobs are priced or customer reviews.
Ashampstead Green questions
Do you cover Ashampstead Green for sand mastic?
Yes, Ashampstead Green is within the area we cover. Our work covers London and the South East. 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 quote.
Do you cover smaller places like Ashampstead Green?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
How long does sand mastic take to harden?
Not straight away. It skins first and hardens fully later and we will give you an idea for your job.
Is it possible to take out silicone and use sand mastic instead?
Generally, yes. With the silicone removed and the joint cleaned, sand mastic is applied by hand.
Can you do several jobs on one visit?
Yes. More than one area can be quoted together.
Which is right for my windows, sand mastic or modern sealant?
For period timber windows in stone or brick, sand mastic is often the better fit. Modern frames normally suit a flexible sealant, and we’ll explain why.
How do I get a quote for sand mastic in Ashampstead Green?
We don’t publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Different surfaces, different methods
Brick reveals
Gaps between frame and brick let in rain and draughts. Renewing the mastic closes it.
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.