Reading · England
Sand Mastic in Sonning
Specialist sand mastic for Sonning: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps between timber frames and stone or brick
- Cracked mastic round a front door frame
About our sand mastic in Sonning
A silicone bead around a sash window can look out of place and doesn’t suit the building. Sand mastic is the traditional choice, and we can replace one with the other. We work on sash and case windows, tenement windows and timber door frames, and people most often call us about cracked mastic round a front door frame and a silicone bead on a sash window that spoils the look.
Mastic can only go onto a dry, clean joint, so window work in Sonning is booked around the forecast. Tell us about access to every side of the house, including upper-floor windows.
Our work is backed for twelve months.
- Place
- Sonning (RG4)
- Wider area
- Reading
- Cover
- One year on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Businesses can book us for washrooms, kitchens, offices and more. On commercial sites, working times can be discussed when we quote.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. Several properties can go on one quote.
What the job involves on each surface
Timber door frames
Door frames get knocked and soaked and the mastic can crack early. It’s renewed by hand.
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Honest limits
We will always be straight with you, so here’s what sealant can’t fix:
- Masonry that needs repairing
- Sashes that rattle, stick or won’t open
- Planning or listed building consent (your local planning authority decides)
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
Where we work in Sonning
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Brick reveals
- Tenement windows
- Timber door frames
What sand mastic looks like in Sonning
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Twyford station, any sash windows need sound mastic to keep draughts and rain out. For site and facilities teams at buildings such as Sonning Church of England Primary School, larger buildings have plenty of frames, and the mastic around each one ages. In the older streets around St Andrew's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Sonning is about 1 mile north-west of Woodley, in Reading. Anywhere in RG4, we can carry out sand mastic at your property. 34 places in Reading are on our list.
Our applicators cover all of the RG4 postcode area for sand mastic and the streets around it. If you need sand mastic at a property on High Street, Parkway Drive and Pound Lane or anywhere close by, our applicators can take on the job. Sonning is on the B478 and B4446, so it’s easy for us to get to. Other places close to Sonning include Play Hatch (1 mile north-west), Dunsden Green (2 miles north-west), Newtown (2 miles south-west), Caversham Park Village (2 miles north-west) and Littlestead Green (2 miles north-west). We also work in nearby towns such as Caversham (3 miles west), Norcot (5 miles west), West Reading (4 miles west), Tilehurst Within (5 miles west), Shinfield (5 miles south-west) and Arborfield Garrison (6 miles south).
Local landmarks in Sonning
Around Sonning, our work takes us to homes and buildings near Ali's Pond Local Nature Reserve, Bull Inn and Waingels College, among other places. For rail, the closest station is Twyford station, roughly 1.9 miles east of the centre. Nearby you will also find Berkshire Medical Heritage Centre Museum (2.5 miles south-west) and Royal Berkshire Hospital (2.6 miles south-west). The countryside around Sonning includes Sonning Hill and South Lake.
Why it’s worth doing now in Sonning
Filling over old, loose mastic does not last. Raking out and preparing the joint gives it a sound base so the new mastic stays put. Older cottages and farmhouses around Sonning 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 price the job in front of us: how many joints, what’s in them now and how we reach them. The price is agreed before we begin.
Why Sonning customers choose us
- Anti-fungal sanitary silicone in wet areas
- 12-month guarantee on every job
- Homes, businesses and hotels
- 20+ years of sealant experience
Take a look at how sealant jobs are priced or our reviews.
Quotes for sand mastic in Sonning
The price is agreed before any work begins. It takes into account:
- The type of sealant required
- Any working-time requirements on site
- The number and length of the joints
- Whether old sealant or filler has to be cut out
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we will go through it with you.
What we need to know
When you call or email, it’s useful to know:
- Where the job is, and your postcode
- Photos by email, if that’s easy
- How many joints, rooms or windows are involved
- Whether it has been sealed before
For sand mastic in Sonning, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before work begins.
What happens on the day
We bring everything the job needs with us. Once we’ve agreed what’s being done, the area is protected and the work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. In a small place like Sonning, access is generally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at the surrounds with you and agree the joints to renew.
- 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.
- The surface is finished to suit the stone or brick.
How to prepare
- Move anything stored near the joints
- Where the joints are inside, avoid wetting them before we arrive
- For business premises, tell us about site rules or sign-in
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job and send photos if you have them.
Related advice
Towns and villages near Sonning
What else we do in Sonning
Can I do it myself?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
If you do try it yourself, take your time over the preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it fails, we can still redo it.
Questions from Sonning
Can you do sand mastic in Sonning?
Yes. Our work covers London and the South East, and Sonning is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Twyford station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. You can phone 0345 464 0079 or drop us an email with the details for a clear quote.
How do I get a quote for sand mastic in Sonning?
We do not 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.
What should I tell you?
The location, the problem and the rough size of the job. Photos by email help too.
Do I need permission for sand mastic on a listed building?
Speak to your local planning authority before work starts. Sand mastic is often favoured as like for like but the decision is theirs.
What exactly is sand mastic?
It’s a mix of sand and a linseed-oil-based binder. It’s applied by hand and finished to sit neatly against the masonry.
How long does sand mastic take to harden?
A skin forms quite soon, but full hardening takes longer. We will explain what to expect before we leave.
Are you insured?
Yes. We’re fully insured.