West Berkshire · England
Sand Mastic in Boxford
Sand mastic for Boxford, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic dropping out of the joint
- Cement or filler used on old window joints that has cracked
- Silicone on a period window that looks wrong
Sand mastic in Boxford
We work across Boxford renewing sand mastic on sash windows and doors. Every joint is cleaned out and filled by hand for a neat, traditional finish. We work on tenement windows, timber door frames and period & listed homes, and people most often call us about draughty sash windows at the surround and tired mastic found when preparing windows for paint.
Somewhere as small as Boxford, older homes often have timber frames set in stone or brickwork. Older buildings like these do not always suit modern silicone, so the sealant has to be chosen to suit the building.
Our work is backed for twelve months.
- Place
- Boxford (RG20)
- Region
- West Berkshire
- Guarantee
- One year on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
Aftercare tips
Aftercare is simple, and it makes a real difference:
- Ask a joiner to look at soft timber first
- Sort the mastic before the decorators arrive
- Check the mastic when you check the paintwork
- Keep modern sealant off the mastic
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
Once mastic starts to crumble, rain gets in. It can soak into the frame and the surrounding masonry so early renewal protects both.
Also in Boxford
Honest limits
A few problems are outside what sealant work can do:
- Putty and glazing repairs
- Masonry that needs repairing
- Whether work needs listed building consent
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly.
Surfaces we seal
- Brick reveals
- Period & listed homes
- Timber door frames
- Sash and case windows
- Tenement windows
- Stone surrounds
What we are called out for in Boxford
Most of it is simply age. Even well-laid mastic needs renewing in time and how long it lasts depends on the weather it faces.
These are the problems we are asked about most:
- Open joints round the window box
- Draughts and rain around sash boxes
- Silicone on a period window that looks wrong
- Crumbling sand mastic round a window
If you live in an older home near Parish Church of St Andrew, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- How long to leave it before use
- Are they insured?
- Who turns up on the day
- What preparation is included
How it works
You do not need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes a few hours for a single window, longer for several for a typical job. Somewhere like Boxford needs a little journey planning: let us know about lanes, gates and parking. 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 is not too thick.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
Getting ready for the visit
- Clear the area around the work
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
Ask for a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will talk you through the work before giving you a price.
Advice
Why deal with it now?
New mastic over crumbling mastic will not hold. Raking out and preparing the joint gives it a sound base so the new mastic stays put. In a small place like Boxford, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit generally makes better use of the time than several visits, so tell us about everything that needs sealing. We will give you a clear quote for the lot.
What you get with us
- A 12-month guarantee on all work
- Anti-fungal sanitary silicone in wet areas
- Experience in homes, commercial sites and hotels
- Approved under the ARBOMaster scheme
Read what affects the cost and our reviews.
Common questions in Boxford
Do you work for landlords with property near Kintbury station?
Yes. We work for letting agents and landlords as well as householders. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we will send you a clear quote.
Do you cover Boxford for sand mastic?
Yes. Our work covers London and the South East, and Boxford is part of that. Just call 0345 464 0079 or send us an email with a few details of the job.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all, and any smell fades as they cure.
Is the work guaranteed?
Every job comes with our one-year guarantee.
Will the old sealant be removed?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so the joint is cleaned back first.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They decide whether consent is needed.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
Can I paint the new mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll talk you through it.
What sand mastic looks like in Boxford
Historic houses like Benham Park (about 2.5 miles south) are a reminder that the area around Boxford 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’s traditional sand mastic. Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Rented homes near Kintbury station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
Boxford is about 4 miles north-west of Newbury, in West Berkshire. We provide sand mastic to homeowners, landlords and businesses in Boxford and the surrounding area. 155 places in West Berkshire are on our list, from the larger towns to small villages. Reading is on our list too, about 17 miles from Boxford.
All of RG20 is within our area for sand mastic, from the main roads to the quietest streets. Streets in the area include School Lane and Winterbourne Road. Nearby, we also carry out sand mastic in Wickham Heath (1 mile south-west), Winterbourne (2 miles east), Stockcross (2 miles south), Bagnor (3 miles south-east) and North Heath (3 miles north-east). Larger places within reach include Newbury (4 miles south-east), Thatcham (6 miles south-east), Burghfield Common (14 miles east), Speenhamland (3 miles south-east), Hungerford (6 miles west) and Calcot (14 miles east).
Near you in Boxford
Locally, jobs take us to homes and businesses close to The Bell pub. The closest station to Boxford is Kintbury station, about 3.9 miles south-west of the centre. Other landmarks nearby include British Balloon Museum & Library Ltd (3.8 miles south-east) and West Berkshire Community Hospital (4.6 miles south-east). Open spaces near Boxford include Sole Common Pond.
Landlords, agents and businesses in Boxford
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
We work for letting agents and landlords as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
Can I do it myself?
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 does not work out, we can still put it right.
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.