Surrey · England
Wonersh Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Wonersh, with a one-year guarantee on every job. Call for a quick quote.
- Patchy fillers round a sash window
- Old sand mastic that has cracked, crumbled or fallen out
- Mastic that needs renewing before redecorating
About our sand mastic in Wonersh
Silicone on a period window often looks wrong and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Common call-outs are for mastic round period door frames that has failed and draughty sash windows at the surround, across timber door frames, tenement windows and brick reveals.
In a village or hamlet like Wonersh, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Our work is backed for twelve months, in Wonersh and everywhere else we cover.
- Place
- Wonersh (GU5)
- Region
- Surrey
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
In hotels, rooms out of use cost money, so the work can be planned room by room. Hotel work is part of what we do, alongside homes and businesses.
Quotes for sand mastic in Wonersh
You’ll get a clear quote before work begins. It takes into account:
- The old material and how stubborn it is
- Whether the work is at height
- The number of rooms or windows
- Which sealant suits the joint
What you pay reflects the work, not guesswork. That’s why we ask about the job first.
What to tell us for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- Any access issues, like height or stairs
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- Any previous sealing or DIY work
Want a quote for sand mastic? Please phone 0345 464 0079 or send us an email with a few details. We will explain what we’d do and send you a clear quote before we start.
The process
A visit follows a simple pattern: we look at the joints together, mask and protect the surrounding surfaces, do the work and clear up. It normally takes a few hours per window, depending on the condition of the joints. Somewhere like Wonersh needs a little journey planning: let us know about lanes, gates and parking. 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.
- Old, loose mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- For indoor joints, keep the area dry beforehand if you can
- Plan for the work area to be out of bounds to pets and children
- Clear the area around the work
Ask for a quote
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
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What we’re called out for in Wonersh
Some old mastic was never deep enough. A thin layer does not hold well so we make sure the new mastic is the right thickness.
Common reasons people contact us are:
- Mastic round period door frames that has failed
- Draughts and rain around sash boxes
- Patchy fillers round a sash window
- Modern sealant on a period surround
Letting a property close to Chilworth station? Then cracked sand mastic around sash windows lets in the draughts tenants complain about.
Comparing quotes
- Is VAT in the price?
- What preparation is included
- When the joint can take water or movement
- The length of the guarantee
Should I try it myself first?
Not every job suits DIY: high-level joints, fire-rated gaps, external movement joints and big jobs need the right product, the right access and the right method.
A DIY attempt doesn’t rule out a professional job. We cut it out and start again.
What the job involves on each surface
Tenement and terrace windows
Upper-floor windows need access planning. Tell us the height and we’ll confirm what’s needed.
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Sand mastic in Wonersh: local notes
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. Historic houses like Chilworth Manor (about 1.7 miles north) are a reminder that the area around Wonersh has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
If you live in an older home near Wonersh United Reformed Church, frames set in older brick or stone need a sealant that suits the wall as well as the frame. Managing a site like Bramley CofE Aided Infant School and Nursery? Then the mastic around its windows and doors needs looking after like any other building’s.
Wonersh is about 4 miles south of Guildford, in Surrey. Wherever you are in the GU5 postcode area, we can carry out sand mastic at your property. We cover 395 towns and villages across Surrey, large and small. Our Crawley page covers work nearby.
Our applicators cover all of the GU5 postcode area for sand mastic and the streets around it. You will find streets such as The Street, Woodyers Close and The Close. We also cover Bramley (1 mile west), Shamley Green (1 mile south-east), Birtley Green (1 mile south), Stroud Common (2 miles south-east) and Grafham (2 miles south). We also work in nearby towns such as Guildford (4 miles north), Woking (8 miles north), Camberley (12 miles north-west), Epsom (15 miles north-east), Farnham (11 miles west) and Reigate (15 miles east).
Landmarks near Wonersh
Locally, jobs take us to homes and businesses close to Shalford Mill, Broadwater School and The Grantley Arms Public House, among other places. For rail, the closest station is Chilworth station, roughly 1.5 miles north-east of the centre. A little further out are Surrey Police Museum (2.6 miles north-west) and Guildford Castle (2.9 miles north-west). Green spaces nearby include St Martha's Hill and Silent Pool.
How to look after the new joints
Simple care keeps the joints in good condition. We recommend:
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid patching sand mastic with silicone
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at before trying a quick fix.
It’s best to renew mastic before painting the windows. Painting over failed mastic hides the problem for a while.
Wonersh: your questions answered
Will you come out to Wonersh?
Yes, Wonersh is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you do sand mastic in Wonersh?
Yes. Our work covers London and the South East, and Wonersh is part of that. You can phone 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear quote.
Can you do several jobs on one visit?
Of course. Doing several areas at once is generally more efficient.
Can sand mastic be painted?
Traditional guidance is not to paint over sand mastic. If you’re redecorating the window, ask us first and we’ll advise.
Can you replace silicone on a period window with sand mastic?
Yes, we do this often. The old silicone has to come out completely so the mastic beds in well.
What does sand mastic cost?
Every job is different, so each one gets its own quote. To get one, phone 0345 464 0079 or email us with a short description of the job.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and it traps any mould or water underneath. We remove it all first.
Should I use sand mastic or silicone?
It depends on the window. Period windows in stone or brick normally suit sand mastic, while modern frames normally get a flexible sealant.