Surrey · England
Sand mastic for sash & case windows in Charlton, Surrey
Sand mastic in Charlton from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Mastic worn away on windows facing the weather
- Mastic that needs renewing before redecorating
- Crumbling sand mastic round a window
About our sand mastic in Charlton
Silicone on a period window often looks wrong and isn’t always the right material. Sand mastic gives a finish that matches the age of the house, and we can replace one with the other. We work on sash and case windows, stone surrounds and period & listed homes, and people most often call us about window mastic to renew ahead of painting and gaps where the frame meets the masonry.
In a village or hamlet like Charlton, older cottages and farmhouses often have timber windows set in stone or brick. Older buildings like these do not always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
You’re covered for a year from the day we finish. If anything isn’t right with it, call 0345 464 0079 or send us an email.
- Location
- Charlton (TW17)
- Region
- Surrey
- Cover
- 12 months on all our work
- Quotes
- A clear price before work begins
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Surface by surface
Stone surrounds
The stone is treated with care while raking out the old mastic.
Brick reveals
Sand mastic is also used where timber frames meet brick. It suits older brickwork.
Why deal with it now?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice and that can be important for listed homes. Where a wall is exposed, as many are in small places like Charlton, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
The cost depends on the amount of work, how hard the old material is to remove and access to the work. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- Full insurance on every job
- A 12-month guarantee on all work
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
Take a look at how sealant jobs are priced and our reviews.
Honest limits
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Timber that has rotted
- Planning or listed building consent (your local planning authority decides)
- Sashes that rattle, stick or won’t open
If in doubt, call 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Stone surrounds
- Sash and case windows
- Brick reveals
- Period & listed homes
- Timber door frames
- Tenement windows
Looking after it afterwards
Simple care keeps the joints in good condition. Our advice:
- Check with your local planning authority if your home is listed
- Do not paint over the new mastic
- Make sure water runs off the sill
- Avoid patching sand mastic with silicone
Don’t touch or press the mastic while it hardens. It skins over quickly, but takes longer to harden fully.
It’s best to renew mastic before painting the windows. Paint over cracked mastic only covers it up.
Places near Charlton
Other services in Charlton
How we quote for sand mastic
You will get a clear quote before any work starts. It’s based on:
- Whether there’s mould to deal with
- The size of the job
- How easy the joints are to reach
- The type of sealant required
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Helping us quote
What to tell us when you ask for a quote:
- Any access issues, like height or stairs
- Pictures of the joints, sent by email
- If someone has resealed it before
- What’s wrong with the joints now
Want a quote for sand mastic? Please call 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.
Charlton homes and the weather
With historic houses such as Hampton Court Palace (about 4.6 miles east) nearby, there’s older building stock in the area around Charlton as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window. Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
For site and facilities teams at buildings such as Littleton CofE Infant School, larger buildings have plenty of frames, and the mastic around each one ages. Homes close to Church of St Mary Magdalene include some older properties, and the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you let a flat or house near Upper Halliford station, cracked sand mastic around sash windows lets in the draughts tenants complain about.
Charlton is about 1 mile west of Sunbury-on-Thames, in Surrey. From the centre of Charlton to the outskirts, we cover sand mastic for every kind of property. Across Surrey, we cover 395 places, and Charlton is one of them. You can also see our page for London, roughly 16 miles from Charlton.
Every address in TW17 is covered for sand mastic, from the main roads to the quietest streets. If you need sand mastic at a property on Lodge Way, Charlton Road and Hetherington Road or a nearby road, our applicators can take on the job. We also cover Littleton Common (1 mile north), Upper Halliford (1 mile south-east), Ashford Common (1 mile north), Shepperton Green (1 mile south-west) and Littleton (1 mile west). Within a short drive, we also cover Guildford (13 miles south-west), Woking (9 miles south-west), Camberley (13 miles south-west), Epsom (9 miles south-east), Ewell (9 miles south-east) and Egham (5 miles west).
Local landmarks in Charlton
Locally, jobs take us to homes and businesses close to Sunbury Manor School, The Bishop Wand Church of England School and Sunbury Park, among other places. The nearest railway station is Upper Halliford station, about 0.6 miles east. Nearby you will also find Kempton Steam Museum (2 miles north-east) and No. 2 New Zealand General Hospital (1.9 miles south-east). Green spaces nearby include St Ann's Hill and Ferris Meadow Lake.
Questions from Charlton
Do you cover Charlton for sand mastic?
Yes, Charlton is within the area we cover. Our work covers London and the South East. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Do you work for landlords with property near Upper Halliford station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we’ll give you a fixed price before work begins.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Do you offer different sealant colours?
In most cases you can choose. We will tell you which colours the right product comes in and agree one before any work starts.
Is sand mastic better than silicone for my windows?
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.
Is it possible to take out silicone and use sand mastic instead?
Yes. We remove the silicone and clean the joint, then point it with sand mastic.
Can sand mastic be painted?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we will talk you through it.
Is there any odour?
Sometimes, a little. Any smell clears as the sealant cures.
DIY versus a professional finish
If you do try it yourself, take your time over the preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
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, then guaranteed for a year.
The process
There’s no need to move everything out before we come, only the area right around the joints. Everything nearby is protected, and the job takes a few hours per window, depending on the condition of the joints in most cases. In a small place like Charlton, access is usually the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We check each window surround and the condition of the joint.
- The joint is raked out and cleaned.
- Large voids are packed out.
- New sand mastic is applied and shaped by hand.
- The finish is dressed neatly.
Preparing for the visit
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job, and we will explain how we’d tackle it. When it suits you, call 0345 464 0079 or send us an email.