Kent · England
Sand mastic for sash & case windows in Lydden, Kent
Professional sand mastic in and around Lydden, with every bit of old sealant taken out first.
- Mastic that needs renewing before redecorating
- Wind and rain getting in round a sash window
- Weathered mastic on the most exposed windows
What happens if it’s left?
Gaps round a sash window let in rain and draughts. Water can get to the frame and the masonry, so dealing with it now protects both. In a small place like Lydden, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
The cost depends on the size of the job, how hard the old material is to remove and access to the work. You’ll have a clear quote before any work starts.
What you get with us
- Tidy, careful work
- Full insurance on every job
- Rated 4.9 stars on Google
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced or customer reviews.
How we handle sand mastic in Lydden
Sand mastic does not last for ever, leaving gaps round the window. We rake it out and renew it so the surround looks right again. If you have gaps where the frame meets the masonry and patchy fillers round a sash window, we can help, on period & listed homes, tenement windows and timber door frames alike.
Somewhere as small as Lydden, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, and sometimes a traditional sand mastic is the better choice.
Each job carries a 12-month guarantee, whatever its size.
- Location
- Lydden (CT15)
- Wider area
- Kent
- Cover
- A year, on every job
- Quotes
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
Other services in Lydden
Landlords, agents and businesses in Lydden
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance that we can handle for you.
We also work for property managers and facilities teams in Lydden and across Kent. We can quote a run of properties together, and we’re fully insured.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. Our tips:
- Don’t run silicone over sand mastic
- Ask a joiner to look at soft timber first
- Take care around the mastic when scraping paint
- Check the mastic when you check the paintwork
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
The process
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and clear up. Most jobs take a few hours for a single window, longer for several. For a village or hamlet like Lydden, the journey is planned in advance: tell us about narrow lanes, gates, long drives and where we can park. Everything for the job comes with us, so a second trip is avoided where possible.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Large voids are packed out first, so the mastic isn’t too thick.
- Sand mastic is mixed and applied by hand, then shaped to the joint.
- The mastic is finished to sit tidily against the stone or brick.
How to prepare
- Mention any tricky access
- Clear items away from the joints we’re working on
- Tell us about any previous sealing or DIY attempts
Ask for a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
Advice
How the job changes by surface
Stone surrounds
We take care not to mark the stone while raking out the old mastic.
Period and listed homes
Period homes look their best with traditional materials.
Lydden: your questions answered
Can you do sand mastic in Lydden?
Yes. We work across London and the South East, and Lydden is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
I let a flat near Kearsney station. Can you help?
Yes. We work for letting agents and landlords as well as homeowners. You can ring 0345 464 0079 or email us with the details for a clear quote.
Do you do commercial work?
Yes. We work in offices, washrooms, hotels and other commercial premises, as well as homes. Working times can be discussed when we quote.
Do you take out the old sealant first?
Yes, always, and completely. New sealant won’t bond properly to old, so the joint is cleaned back first.
Is it worth trying it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How long does sand mastic take to harden?
It forms a skin fairly soon and it hardens fully over a longer time. The weather and joint depth both affect it.
Can I choose the sealant colour?
Usually, yes. Sealants come in white, clear, grey and other colours for many products, and we agree the colour with you before we start.
Can new sealant go over the old?
No. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Should I try it myself first?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Lydden homes and the weather
Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
If you live in an older home near Church of St Mary Church of St Mary Virgin, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. For site and facilities teams at buildings such as Lydden Primary School, its window and door frames need their mastic kept sound, just like a home’s. Letting a property close to Kearsney station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Lydden is about 3 miles north-west of Dover, in Kent. Anywhere in CT15, our applicators can take on sand mastic. 922 places in Kent are on our list. You can also see our page for Chelmsford, about 51 miles away.
Postcode districts we cover here for sand mastic: CT15. Whether your property is on St Marys Rise, Canterbury Road and The Close or a nearby road, our applicators can take on the job. Neighbouring places we cover for sand mastic include Coldred (1 mile north), Ewell Minnis (1 mile south-west), Temple Ewell (1 mile south-east), Halfway Street (1 mile north-west) and Wolverton (2 miles south). Further out, we also cover Canterbury (11 miles north-west), Dover (3 miles south-east), Folkestone (6 miles south-west), Ramsgate (14 miles north-east), Deal (8 miles north-east) and Herne Bay (15 miles north).
Around Lydden
We work in homes and buildings around Sladden Wood and Hope Inn, among other places. For rail, the closest station is Kearsney station, roughly 1.6 miles south-east of the centre. Other landmarks nearby include Dover Transport Museum (2.3 miles south-east) and Dover Castle (4.3 miles south-east). Not far away are Dover Western Heights.
How we quote for sand mastic
The quote reflects the job in front of us. We take into account:
- The amount of work
- Working hours on commercial sites
- Whether the work is at height
- Whether there’s mould to deal with
We don’t show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we’ll talk you through it.
What to tell us for a quote
Before you ask for a quote, have a think about:
- Where the property is
- If it’s domestic, commercial or a hotel
- Any previous sealing or DIY work
- The problem you’ve noticed
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we will explain what’s involved before giving you a price.