Kent · England
Sand mastic for sash & case windows in West Kingsdown, Kent
Problem with your window and door surrounds in West Kingsdown? We cut out the old, prepare the joints and apply the right sealant.
- Tired mastic found when preparing windows for paint
- Draughty sash windows at the surround
- Cement or filler used on old window joints that has cracked
Sand mastic in West Kingsdown, done properly
Fresh sand mastic forms a skin quite soon but full hardening takes longer. Traditionally, sand mastic is left unpainted, so ask us before you decorate. Common call-outs are for draughty sash windows at the surround and old sand mastic that has cracked, crumbled or fallen out, across brick reveals, sash and case windows and period & listed homes.
Many houses in smaller places like West Kingsdown have conservatories, garden rooms or patio doors. Those joints need the same attention as the main windows.
You’re covered for a year from the day we finish. If there’s a problem with it, please call 0345 464 0079 or drop us an email.
- Where
- West Kingsdown (TN15)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
DIY sealant or a professional job?
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.
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.
West Kingsdown homes and the weather
Historic houses like Lullingstone Castle (about 2.8 miles west) are a reminder that the area around West Kingsdown has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window. London and the South East are among the drier parts of the UK, 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 West Kingsdown CofE VC Primary School, larger buildings have plenty of frames, and the mastic around each one ages. Letting a property close to Eynsford station? Then any sash windows need sound mastic to keep draughts and rain out.
West Kingsdown is about 6 miles north-east of Sevenoaks, in Kent. Homes, rented property, offices and hotels in West Kingsdown can book us for sand mastic, old or new, large or small. The work is guaranteed for a year. Our Kent coverage runs to 922 places, West Kingsdown among them. For nearby work, see our London page (19 miles or so).
Work in TN15 is quoted and booked the same way as anywhere else. Streets in the area include Church Road, London Road and Hever Wood Road, and we cover them all. Other places close to West Kingsdown include Maplescombe (1 mile north-west), Knatts Valley (1 mile south-west), East Hill (1 mile south-west), Fawkham Green (2 miles north-east) and Ash (2 miles north-east). Within a short drive, we also cover Maidstone (13 miles south-east), Dartford (7 miles north), Sevenoaks (6 miles south-west), Royal Tunbridge Wells (15 miles south), Gravesend (8 miles north-east) and Tonbridge (10 miles south).
Near you in West Kingsdown
For rail, the closest station is Eynsford station, roughly 2.6 miles north-west of the centre. Nearby you will also find Otford Heritage Centre (3.8 miles south-west) and Eynsford Castle (2.6 miles north-west).
How we quote for sand mastic
Every job gets its own quote. These are the things that affect it:
- Whether the work is at height
- The type of sealant required
- When we can work, for business premises
- Any mould that needs treating
No two jobs are quite the same, so we quote each one individually. The number of joints, how easy they are to reach and the sealant needed all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
What to tell us when you ask for a quote:
- How many joints, rooms or windows are involved
- Where the job is, and your postcode
- Pictures of the joints, sent by email
- Whether it’s a home or a business
A good description makes for an accurate quote. Tell us where the job is, what’s wrong and how much there is, and add photos by email if you can.
How the job changes by surface
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
What we’re called out for in West Kingsdown
Previous repairs in cement or silicone often trap water or crack away. They do not suit the joint, and they usually need raking out.
If you can see any of these, it’s time to have the joints looked at:
- Cracked mastic round a front door frame
- Crumbling sand mastic round a window
- Failed mastic on an exposed elevation
- Tired mastic found when preparing windows for paint
If you live in an older home near Church of Saint Edmund, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Questions to ask before you book
- How much experience the applicator has
- Which sealant they’ll use, and why
- Whether all the old sealant comes out first
- What preparation is included
Honest limits
New sealant can’t fix everything, and we’ll tell you before work begins. It won’t solve:
- Planning or listed building consent (your local planning authority decides)
- Putty and glazing repairs
- Sash cords, weights and draught-proofing of the sashes
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
Surfaces we seal
- Period & listed homes
- Timber door frames
- Stone surrounds
- Sash and case windows
- Brick reveals
- Tenement windows
West Kingsdown: your questions answered
Is West Kingsdown within the area you cover?
Yes, we do. 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.
I let a flat near Eynsford station. Can you help?
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.
What guarantee comes with the work?
Our 12-month guarantee applies to all our work.
Is consent needed for window work on a listed home?
Checking first is sensible. Your local planning authority can say if consent is needed for work on a listed home or in a conservation area.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
Do I have to be there?
If the work is inside, we need someone to let us in. Once we have agreed the job, you don’t need to watch us work.
What should I tell you?
Let us know what needs doing and where, plus photos if you have them. If we need more, we will ask.
How long will you be here?
As a guide, most jobs take a few hours per window, depending on the condition of the joints. Bigger jobs take longer, and we’ll tell you how long to expect.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Don’t run silicone over sand mastic
- Go gently near the mastic when preparing windows
- Ask the planning authority about consent for listed or conservation-area homes
- Keep sills and gutters clear so water drains away
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Fine cracks show the mastic is starting to fail. It’s easier to renew it before it drops out.
Also near West Kingsdown
What else we do in West Kingsdown
What we do, step by step
There’s no need to move everything out before we come, only the area right around the joints. We protect the rest, and the job takes anything from a few hours to a full day, depending on how many windows in most cases. Parking around West Kingsdown is normally easier than in a town centre, but mention any lanes, gates or long drives. For outside work, side access and the height of the joints help us plan.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- 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
- Keep pets and children clear of the area while we work
- Tell us if parking is tricky
- Where the joints are inside, avoid wetting them before we arrive
Ask for a quote
If you’re in West Kingsdown and need sand mastic, call 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.