Kent · England
Sand Mastic in Lower Hartlip
Window and door surrounds in Lower Hartlip need attention? We remove the old material, prepare the joints and seal them properly, and the work is guaranteed for a year.
- Old sand mastic that has cracked, crumbled or fallen out
- Silicone on a period window that looks wrong
- Weathered mastic on the most exposed windows
Lower Hartlip: your questions answered
Do you work for landlords with property near Newington station?
Yes, we work for landlords and letting agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is sand mastic in a coastal place like Lower Hartlip any different?
Coastal homes put outside sealant through more weather than inland ones, so the choice of sealant and the preparation matter even more. Walls facing the sea are usually the first to need attention.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What’s sand mastic made of?
Sand plus a binder based on linseed oil. It’s built up in the joint by hand and finished to sit neatly against the masonry.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
How long does the job take?
Most jobs take a few hours per window, depending on the condition of the joints. We will confirm how long when we quote.
Can you replace silicone on a period window with sand mastic?
Generally, yes. With the silicone removed and the joint cleaned we point it with sand mastic.
Are you ARBOMaster approved?
Yes. We’re an ARBOMaster approved applicator.
About our sand mastic in Lower Hartlip
Old sand mastic cracks, crumbles and falls out over time and gaps open up round the frame. We rake it out and renew it and tidies the surround. We are often asked to deal with cement or filler used on old window joints that has cracked and mastic dropping out of the joint, on timber door frames, stone surrounds and period & listed homes.
In a village or hamlet like Lower Hartlip, 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.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Lower Hartlip (ME9)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Also near Lower Hartlip
Other services in Lower Hartlip
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant will not do:
- Masonry that needs repairing
- Sashes that rattle, stick or will not open
- Timber that has rotted
If you’re not sure, just ring 0345 464 0079 or email us and we’ll give you a straight answer.
Where we work in Lower Hartlip
- Timber door frames
- Brick reveals
- Period & listed homes
- Stone surrounds
- Sash and case windows
- Tenement windows
Keeping the joints in good condition
So the new joints stay in good condition:
- Find out about consent before window work on a listed home
- Keep sills and gutters clear so water drains away
- Inspect the joints round the windows every year or so
- Plan mastic work ahead of painting
Keep gutters and sills clear so water runs away from the surround. Constant wetting wears the mastic faster.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Frames and glazing around Lower Hartlip
Lower Hartlip is within about 3 miles of the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That is hard on the mastic around older windows and doors, especially on the side facing the sea. Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
Managing a site like Hartlip Endowed Church of England Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. For landlords with property near Newington station, older sash windows in a rental need their mastic kept sound to keep the weather out.
Lower Hartlip is about 3 miles south-east of Gillingham, in Kent. Our applicators cover sand mastic for homes and businesses in Lower Hartlip. 922 places in Kent are on our list, from the larger towns to small villages. Chelmsford is on our list too, about 28 miles from Lower Hartlip.
We work across the ME9 postcode area for sand mastic. That includes homes and businesses on Lower Hartlip Road, Grainey Field and Old House Lane and the roads around them. We also cover Hartlip (1 mile west), Breach (1 mile north-east), Newington (1 mile east), Moor Street (1 mile north-west) and Meresborough (1 mile west). Within a short drive, we also cover Maidstone (8 miles south-west), Sittingbourne (4 miles east), Gravesend (13 miles north-west), Faversham (11 miles east), Northfleet (14 miles north-west) and Minster (8 miles north-east).
Local landmarks in Lower Hartlip
Locally, jobs take us to homes and businesses close to Foxburrow Wood and Leigh Academy Rainham, among other places. Lower Hartlip’s nearest station is Newington station, about 1.1 miles north-east. Well-known places in the area include Court Hall Museum (3.8 miles east) and Bayford Court (4.3 miles east). Open spaces near Lower Hartlip include Detling Hill and Bishop Saltings.
Why it’s worth doing now in Lower Hartlip
Silicone might seem the quicker option, but on period stone or brick it often looks out of place. Sand mastic suits the building and blends with the stone or brick. In a small place like Lower Hartlip, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. We give a clear quote before any work starts.
Why us?
- Full insurance on every job
- 4.9 on Google from 180+ five-star reviews
- Neat joints and a tidy finish
- Over 20 years’ experience
Read our cost guide and what customers say.
DIY sealant or a professional job?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and getting the depth right matters as much as the look.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
What we’re called out for in Lower Hartlip
Rain on the window surround works into any crack and pushes it out. Windows facing the weather tend to go first.
Keep an eye out for any of the following:
- Crumbling sand mastic round a window
- Mastic that needs renewing before redecorating
- Old cement repairs round a window that have failed
- Mastic round period door frames that has failed
Homes close to Church of St Michael include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
What your quote should include
- Are they insured?
- How the joint is cleaned and prepared
- Is VAT in the price?
- What guarantee comes with the work
Landlord and commercial work in Lower Hartlip
Hotels need rooms back in use, so we plan the work room by room around your bookings where we can. Hotel work is part of what we do, alongside homes and businesses.
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance that we can handle for you.
The process
We keep the work tidy and contained to the joints we are treating, so you can get on with your day. Expect the work to take a few hours per window, depending on the condition of the joints, and we tell you how long to leave it before we go. Somewhere like Lower Hartlip needs a little journey planning: tell us about narrow lanes, gates, long drives and where we can park. We bring what the job needs, so it can be finished in one trip where possible.
- Each surround is checked first.
- The joint is raked out and cleaned.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Let us know about earlier repairs to the joints
- Let us know if you’ve seen damp or leaks
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email photos if that’s easy.