Kent · England
Sand mastic for sash & case windows in Yalding, Kent
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in Yalding. Fully insured, ARBOMaster approved and guaranteed for a year.
- Cement or filler used on old window joints that has cracked
- Mastic worn away on windows facing the weather
- Draughts and rain around sash boxes
Sand mastic in Yalding
Traditional burnt sand mastic that sits naturally against stone and brick. It suits period and listed homes, where modern sealant can look out of place. If you’re dealing with draughty sash windows at the surround and open joints round the window box, we can help.
Outdoor sealant needs dry, clean surfaces, so work on frames around Yalding is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
Each job carries a 12-month guarantee, large or small.
- Place
- Yalding (ME18)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Looking after it afterwards
After the cure time, these simple habits help:
- Get any rot dealt with first
- Make sure water runs off the sill
- Take care around the mastic when scraping paint
- Avoid patching sand mastic with silicone
Leave the new mastic unpainted, which is the traditional advice. If you’re redecorating, ask us first.
Sound mastic protects the frame. Once it fails, water can sit against the timber and timber that stays wet can rot.
Places near Yalding
Other services in Yalding
Why act early in Yalding
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. Where a wall is exposed, as many are in small places like Yalding, wind-driven rain gets into any failed joint, and older walls, once damp, take a long time to dry.
Rather than a set price list, 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.
What you get with us
- An ARBOMaster approved applicator
- We are fully insured
- Trusted Arbo and Everbuild sealants
- 20+ years of sealant experience
Read our cost guide and customer reviews.
What we can’t put right
Sealant isn’t the answer to every problem, and we’d rather say so up front. Sealant will not put right:
- Decisions on consent for listed homes
- Masonry that needs repairing
- Sashes that need overhauling
Not sure which it is? You can call 0345 464 0079 or send us an email and we’ll tell you honestly before booking.
Joints and surfaces we work on
- Sash and case windows
- Brick reveals
- Timber door frames
- Tenement windows
- Period & listed homes
- Stone surrounds
What affects the cost of sand mastic
Your quote is based on your job. We look at:
- How many areas need sealing
- The number and length of the joints
- Mould in or behind the old joints
- Access and height
Every job is a little different, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part.
What to tell us for a quote
What to tell us when you ask for a quote:
- If someone has resealed it before
- If it’s domestic, commercial or a hotel
- The address or postcode of the job
- The problem you’ve noticed
If you’re in Yalding and need sand mastic, phone 0345 464 0079 or email us. Tell us what the problem is and where, and you will get a clear quote before any work starts.
Questions from Yalding
Do you cover Yalding for sand mastic?
Yes. Our work covers London and the South East, and Yalding is part of that. Just phone 0345 464 0079 or send us an email with a few details of the job.
Do you cover smaller places like Yalding?
Yes, Yalding is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Is it possible to paint over sand mastic?
The usual advice is to leave sand mastic unpainted. Ask us before you decorate around it and we’ll advise.
Do you work for letting agents?
Yes, often. We can quote for several properties at once, and between tenancies is a good time for the work.
Where are you based?
We’re based in Crawley, West Sussex, and we cover South East England, London and all of Scotland.
Will you leave a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
What does sand mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or send us an email with a short description of the job.
How long will you be here?
That depends on how much there is to do, but as a guide it takes a few hours for a single window, longer for several. We will give you a better idea when we quote.
Frames and glazing around Yalding
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.
Rented homes near Yalding station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. For an older house near a landmark such as St Peter's and St Paul's Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Yalding is about 5 miles south-west of Maidstone, in Kent. Wherever you are in the ME18 postcode area, our applicators can take on sand mastic. Yalding is one of 922 towns and villages in Kent where we work. We also work in Crawley, about 28 miles from Yalding.
All of ME18 is covered for sand mastic. Whether your property is on High Street, Windmill Path and Blunden Lane or anywhere close by, our applicators can take on the job. Neighbouring places we cover for sand mastic include Congelow (1 mile south), Benover (1 mile south), Hunton (1 mile south-east), Nettlestead Green (1 mile north-west) and Laddingford (1 mile south-west). Within a short drive, we also cover Maidstone (5 miles north-east), Sittingbourne (15 miles north-east), Sevenoaks (11 miles west), Royal Tunbridge Wells (10 miles south-west), Gravesend (14 miles north) and Tonbridge (7 miles west).
Around Yalding
We work in homes and buildings around Quarry Wood and The Walnut Tree Public House. For rail, the closest station is Yalding station, about 1 mile west of the centre. A little further out are Oakwood Hospital (3.7 miles north-east) and Teapot Island (0.8 miles south-west).
What the job involves on each surface
Sash and case windows
The box of a sash and case window sits in the stone or brick opening. Sand mastic seals the joint round it.
Period and listed homes
Many older homes were built with sand mastic round the windows. On listed buildings, check with your planning authority first.
How the visit works
The work is kept neat and contained to the area we’re working on, so you can get on with your day. Expect the work to take a few hours for a single window, longer for several, and we explain the cure time before we leave. Somewhere like Yalding 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.
- Each surround is checked first.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Preparing for the visit
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
- Try not to wet indoor joints just before the visit
Getting a quote
Call for a quick quote, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
Read more
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again, so just mention it when you contact us.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.