Kent · England
Harvel Window Mastic
Mastic around window and door frames, sills and patio doors in Harvel, with a 12-month guarantee on every job. Ask us for a quote.
- Black, perished sealant on frames
- Hard, cracked sealant around windows
- White mastic on grey or black frames
Signs you need window mastic in Harvel
Every frame moves through the day. A plastic or aluminium frame lengthens in sunshine and shortens as it cools, while the masonry beside it stays put. If the sealant can’t stretch, it splits.
Most people get in touch when they notice something like this:
- Cracked internal joints between frame and plaster
- Water coming in at the bottom corners of a door
- Draughts coming in around windows and doors
- Gaps where the sill meets the wall
Letting a property close to Sole Street station? Then cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Before booking anyone
- What the cure time is
- The length of the guarantee
- Whether you can choose the colour
- Who turns up on the day
About our window mastic in Harvel
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that cannot move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. We work on uPVC windows, patio & French doors and composite doors, and the jobs we see most are black, perished sealant on frames and untidy mastic left by window fitters.
Mastic can only go onto a dry, clean joint, so window work in Harvel is booked around the forecast. Let us know about access to all the frames, upstairs ones included.
Whatever the size of the job, it’s backed by our 12-month guarantee.
- Place
- Harvel (DA13)
- Wider area
- Kent
- Cover
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Frames and glazing around Harvel
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. Historic houses like Cobham College (about 3.4 miles north-east) are a reminder that the area around Harvel has older buildings as well as new. Where a home is older, older frames set in brick or stone need a sealant that suits them, and sometimes that’s traditional sand mastic.
If you look after a building such as Culverstone Green Primary School, its window and door frames need their mastic kept sound, just like a home’s. In the older streets around Church of Our Lady of the Meadow, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint.
Harvel is about 6 miles south of Gravesend, in Kent. Across the DA13 area, we can carry out window mastic at your property. Harvel is one of 922 towns and villages in Kent where we work for window mastic. For nearby work, see our London page.
Here we cover the DA13 postcode area for window mastic. Local streets include St Francis Road, Hart Lane and Harvel Street, all of which we cover. We also cover Priestwood Green (1 mile north), Culverstone Green (1 mile south-west), Priestwood (1 mile north), South Street (1 mile north-west) and Vigo Village (1 mile south). Larger places within reach include Maidstone (9 miles south-east), Dartford (9 miles north-west), Sevenoaks (9 miles south-west), Royal Tunbridge Wells (15 miles south), Gravesend (6 miles north) and Tonbridge (11 miles south).
Local landmarks in Harvel
Around Harvel, our work takes us to homes and buildings near Meopham School and Trosley Country Park and the streets around them. The closest station to Harvel is Sole Street station, about 2.7 miles north of the centre. A little further out are Leybourne Castle (3.6 miles south-east) and Coldrum Long Barrow (1.6 miles south). Not far away are Ranscombe Farm.
What happens if it’s left?
Draughts and leaks don’t always mean new windows. Where the frames are sound, new mastic generally deals with draughts and leaks at the edges. Problems with the glass or gaskets are for a window company, and we will say so. Older cottages and farmhouses around Harvel can have timber floors and frames, and water through a failed joint can rot timber if it’s left.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why us?
- Old sealant always removed completely
- Fully insured
- Colour picked to suit the job
- More than 20 years in sealant work
Read how sealant jobs are priced and customer reviews.
FAQs for Harvel
I let a flat near Sole Street station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or send us an email and tell us about the property, and we’ll send you a clear quote.
Can you do window mastic in Harvel?
Yes. Our work covers London and the South East, and Harvel is part of that. Just call 0345 464 0079 or email us with a few details of the job, and we’ll give you a clear quote.
Is the work guaranteed?
Yes. Each job is covered for 12 months, inside or out.
What do you put in the joint?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we’re using and why.
Can resealing stop a draught around my window?
If the draught is coming in around the frame, yes. If it’s through the window’s own seals or a hinge, that is a different fix, and we’ll say so.
How long does it take to reseal the windows on a house?
The work takes anything from an hour or two to a full day, depending on how many frames there are. Access and how stubborn the old mastic is affect the time most.
Do I have to be there?
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.
Will there be a smell?
Sometimes, a little. It fades as the sealant cures, and ventilation helps.
Landlord and commercial work in Harvel
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. Several properties can go on one quote.
Letting agents and landlords in Harvel can book us as well as homeowners. Sealant work between tenants keeps a property looking cared for.
Places near Harvel
What else we do in Harvel
The process
You do not need to clear the whole room or building, just the space around the work. Everything nearby is protected, and the work takes a few hours for a few frames, or a day or more for a whole house for a typical job. Somewhere as small as Harvel, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First, we go round the frames with you and agree the list.
- We remove the old mastic and clean the frame edge and wall.
- Deep gaps get closed-cell backing rod to set the depth.
- A flexible exterior sealant is applied in a colour to suit the frame.
- We tool each bead neatly and check every joint is closed.
Before we arrive
- Tell us if parking is tricky
- Tell us about any water getting in
- Keep children and pets away from the work area
Get a quote
We quote each job on its own. Just ring 0345 464 0079 or drop us an email with the details.
Related advice
When it isn’t the sealant
We’ll always be straight with you, so here’s what new sealant won’t do:
- Damp coming through the wall itself rather than the frame joint
- A door that needs adjusting, rehanging or new seals
- A failed sealed unit that has misted up
Not sure which it is? You can ring 0345 464 0079 or email us and we will tell you honestly before booking.
Where we work in Harvel
- Composite doors
- uPVC windows
- Timber windows & doors
- Patio & French doors
- Aluminium frames
- Window sills
Keeping the joints in good condition
So the new joints stay in good condition:
- Check the mastic once a year
- Keep paint off silicone joints
- Don’t aim a pressure washer at the joints
- Wash the frames with mild soapy water
Have a look at the joints once a year, ideally after winter. Small splits are simple to catch before they leak.
Signs to watch for: split or missing mastic, gaps, damp patches inside or black mould on the reveal. Any of these is worth a call.
Quotes for window mastic in Harvel
Some jobs are bigger than they look, and some smaller. The main factors:
- The type of sealant required
- Any mould that needs treating
- How many areas need sealing
- Access and height
There are no prices on our website, because each job is priced on what it involves. Call for a quick quote and we’ll talk you through it.
What we need to know
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Where the property is
- Photos by email, if that’s easy
- The problem you’ve noticed
- How we’d reach the joints
Need a quote? Please ring 0345 464 0079 or drop us an email and tell us about the job. You’ll know what we plan to do, and what it will cost, before any work begins.