Reading · England
Sand Mastic in Sonning Common
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Sonning Common and across Reading. Fully insured, ARBOMaster approved and guaranteed for a year.
- Old cement repairs round a window that have failed
- Gaps between timber frames and stone or brick
- Mastic worn away on windows facing the weather
Sand mastic in Sonning Common
Across Sonning Common, we renew sand mastic around sash and case windows. Every joint is cleaned out and filled by hand for a neat, traditional finish. We work on brick reveals, tenement windows and stone surrounds, and people most often call us about weathered mastic on the most exposed windows and old sand mastic that has cracked, crumbled or fallen out.
Many houses in smaller places like Sonning Common have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we’ll put it right.
- Where
- Sonning Common (RG4, RG9)
- Wider area
- Reading
- Guarantee
- One year on every job
- Quote
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
You do not need to clear the whole room or building, only the area right around the joints. Everything nearby is protected, and the job takes anything from a few hours to a full day, depending on how many windows in most cases. A visit to Sonning Common is planned like any other: the time, the access and where to park are agreed in advance. Outdoor jobs depend on a dry day, since sealant needs a dry surface.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- We finish the mastic to a tidy line.
How to prepare
- Mention any leaks or damp you’ve noticed
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
Get a quote
Need a quote? Please call 0345 464 0079 or drop us an email and tell us about the job. We will explain what we’d do and send you a clear quote before work begins.
Advice
Also near Sonning Common
What else we do in Sonning Common
Why act early in Sonning Common
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. In an older home around Sonning Common, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
The cost depends on the size of the job, how hard the old material is to remove and how easy the joints are to reach. You will have a clear quote before any work starts, so you know where you stand.
Why choose Mr Mastic in Sonning Common
- Rated 4.9 stars on Google
- Quality sealants from Arbo and Everbuild
- Anti-fungal silicone where joints get wet
- Experience in homes, commercial sites and hotels
Take a look at our cost guide or what customers say.
Landlord and commercial work in Sonning Common
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.
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
Do you need sand mastic in Sonning Common?
Decorating can disturb tired mastic. It’s often found when windows are being prepared for paint, which is a good time to renew it.
If you can see any of these, it’s time to have the joints looked at:
- Silicone on a period window that looks wrong
- Window mastic to renew ahead of painting
- Gaps round a timber door in stone or brick
- Failed mastic on an exposed elevation
Rented homes near Henley-On-Thames station change hands often, and cracked sand mastic around sash windows lets in the draughts tenants complain about.
What your quote should include
- Whether they seal over old material or remove it
- How hidden problems are handled
- Who does the work, and how experienced they are
- What the quote includes, VAT included or not
Should I try it myself first?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
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 fails, we can still redo it.
Quotes for sand mastic in Sonning Common
For a quick quote, just ask. The main things that affect it are:
- Access and height
- The number of rooms or windows
- When we can work, for business premises
- Any mould that needs treating
Combining jobs into one visit is normally more efficient than separate visits. We’ll send you a clear quote for the lot.
What to tell us for a quote
When you contact us, these details help:
- The type of property
- What’s wrong with the joints now
- How we’d reach the joints
- Any previous sealing or DIY work
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is, and we will talk you through what we’d do. When it suits you, phone 0345 464 0079 or email us.
Sonning Common questions
Will you come out to Sonning Common?
Yes, smaller places are covered as well as towns. Our work covers London and the South East. Let us know about access, parking and anything unusual about getting there when you book.
Do you work for landlords with property near Henley-On-Thames station?
Yes. We work for letting agents and landlords as well as homeowners. You can phone 0345 464 0079 or email us with the details for a clear quote.
Will there be a smell?
Some sealants have a smell while they cure, but it fades. Opening a window helps.
Do you remove the old sealant?
Yes. All of the old material is cut out and the joint cleaned before resealing.
Are you fully insured?
Yes. We are fully insured, and we have been doing sealant work for more than 20 years.
How long does sand mastic take?
As a guide, most jobs take a few hours for a single window, longer for several. Bigger jobs take longer.
Can you do several jobs on one visit?
Yes, we can. More than one area can go on one quote.
Is the work guaranteed?
There’s a 12-month guarantee on every job.
Looking after it afterwards
To keep the joints looking good and working properly:
- Find out about consent before window work on a listed home
- Take care around the mastic when scraping paint
- Keep modern sealant off the mastic
- Do not paint over the new mastic
Leave the new mastic alone while it firms up. It skins over quickly, but takes longer to harden fully.
Good mastic helps keep the frame dry. Failed mastic lets water reach the timber, which can lead to rot.
Sonning Common homes and the weather
Historic houses like Greys Court (about 2.2 miles north-east) are a reminder that the area around Sonning Common 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 is traditional sand mastic. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
If you live in an older home near The Church of Christ the King, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Managing a site like Sonning Common Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
Sonning Common is about 3 miles north of Caversham, in Reading. For sand mastic in and around Sonning Common, it’s easy to get a quote: please phone 0345 464 0079 or drop us an email. We cover Reading from our Crawley base. Sonning Common is one of 34 towns and villages in Reading where we work for sand mastic.
Jobs for sand mastic in RG4 and RG9 is quoted and booked the same way as anywhere else. That includes homes and businesses on Wood Lane, Green Lane and Woodbury Close. If you’re just outside Sonning Common, we cover Peppard Hill (1 mile north-west), Rotherfield Peppard (1 mile north), Kidmore End (1 mile south-west), Kingwood Common (1 mile north-west) and Shepherd's Green (2 miles north). Larger places within reach include Caversham (3 miles south), Norcot (4 miles south-west), West Reading (4 miles south), Tilehurst Within (5 miles south-west), Shinfield (8 miles south) and Arborfield Garrison (10 miles south). As one of the bigger places in Reading, Sonning Common has homes, rented property and businesses of every kind.
Around Sonning Common
We work in homes and buildings around Maiden Erlegh Chiltern Edge, The Warwick School and Hare & Hounds pub, among other places. For rail, the closest station is Henley-On-Thames station, about 3.7 miles east. Well-known places in the area include Frazer Nash Archives (3.8 miles east) and Battle Hospital (4.1 miles south). The countryside around Sonning Common includes Sonning Hill and Warburg Nature Reserve.