Kent · England
Window & door mastic in Windmill Hill, Kent
We cover Windmill Hill for mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly.
- Sealant in the wrong colour for the frame
- Rain getting in at the frame or under the sill
- Gaps between the frame and the inside reveal
When to call us in Windmill Hill
Joint shape matters as much as the product. A thin smear across a wide gap has nothing to it, and a gap filled solid cannot flex. Backing rod sets the right depth.
Any of these means the joints need attention:
- Mastic that has split away from the wall
- Draughty joints inside around the window
- Old mastic that has gone black or come away
- Gaps left after new windows were fitted
Letting a property close to Gravesend station? Then renewing tired window mastic between tenants heads off draught and damp complaints.
What your quote should include
- Whether the sealant suits the joint
- How much experience the applicator has
- What happens if the job turns out different
- Is VAT in the price?
How we handle window mastic in Windmill Hill
The mastic around a window or door seals the gap between the frame and the wall. When it cracks, hardens or pulls away, draughts and rain get in. Our applicators cut it out and replace it with a flexible, weatherproof sealant. If you have black, perished sealant on frames and whistling draughts around closed windows, we can put it right, whatever the surface.
Homes around Windmill Hill range from older properties to newer houses, and their windows range just as widely. Each frame material needs the right sealant against the right wall.
You’re covered for a year from the day we finish. If anything is not right with it, phone 0345 464 0079 or drop us an email.
- Location
- Windmill Hill (DA12, DA11)
- Region
- Kent
- Guarantee
- A year, on every job
- Quote
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Windmill Hill
What else we do in Windmill Hill
The process
When we arrive, we look over the joints with you first, so you know exactly what we are doing. We protect the surfaces around the joints before work begins. The work generally takes a morning for a couple of windows and a door. In a smaller place like Windmill Hill, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- First, we go round the frames with you and agree the list.
- The old mastic is cut out and scraped back to clean surfaces.
- Where the gap is deep, backing rod goes in first.
- The new sealant goes on in white, brown, anthracite grey, black or clear to suit.
- Every joint is tooled smooth and checked before we leave.
How to prepare
- Mention any parking rules near the property
- Mention if the joints have been sealed before
- Plan for the work area to be out of bounds to pets and children
Ask for a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
Read more
What sealant work cannot fix
A few problems are outside what sealant work can do:
- Soft or decayed wood in the frame
- Draughts through the window seals rather than the frame
- Condensation trapped between the panes
Not sure which it is? You can phone 0345 464 0079 or send us an email and we’ll tell you honestly.
What we seal
- Timber windows & doors
- Composite doors
- Aluminium frames
- uPVC windows
- Patio & French doors
- Window sills
What window mastic looks like in Windmill Hill
Windmill Hill is close to the coast, and homes near the sea take more wind-driven rain, with salt in the air closer to the shore. That’s hard on the mastic around window and door frames, especially on the side facing the sea. Historic houses like Cobham College (about 3.3 miles south) are a reminder that the area around Windmill Hill 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.
Managing a site like Wrotham Road Primary School? Then its window and door frames need their mastic kept sound, just like a home’s. If you live in an older home near Christ Church Milton, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Windmill Hill is about 1 mile north-west of Gravesend, in Kent. Our applicators cover window mastic for homeowners, landlords and businesses in Windmill Hill and the surrounding area, as part of our work across Kent. Across Kent, we cover 922 places, and Windmill Hill is one of them. We also work in London, about 21 miles from Windmill Hill.
Postcode districts we cover here for window mastic: DA12 and DA11. We cover properties on New Road, Sun Lane and Joy Road. You will find Windmill Hill on the A227, so it’s easy for us to get to. Other places close to Windmill Hill include Gravesend (1 mile south-east), Milton-next-Gravesend (1 mile north-east), Denton (1 mile east), Northfleet (1 mile west) and Painters Ash (2 miles south-west). We also work in nearby towns such as Maidstone (13 miles south-east), Dartford (6 miles west), Sevenoaks (13 miles south-west), Swanley (9 miles west), Kings Hill (11 miles south) and Foley Park (13 miles south-east).
What’s near Windmill Hill
Around Windmill Hill, our work takes us to homes and buildings near St John's Catholic Comprehensive, Mayfield Grammar School and The Waterloo Public House, among other places. Windmill Hill’s nearest station is Gravesend station, about 0.5 miles north-west. Well-known places in the area include Gravesham Museum (0.5 miles north) and Stone Castle (4.1 miles west). The countryside around Windmill Hill includes Sawyers Lake and Gad's Hill.
Questions from Windmill Hill
Do you work for landlords with property near Gravesend 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 quote.
Do you cover smaller places like Windmill Hill?
Yes, Windmill Hill is covered. Our work covers London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
What sealant do you use?
Products from Arbo and Everbuild, among others, chosen to suit the joint. We will tell you what we’re using and why.
Do you seal inside as well as outside?
Yes, we do both. Indoors, we seal between the frame and the plaster or reveal, using a paintable sealant if you want to decorate.
Can you seal over the old sealant?
No, and we never do. It may look fine at first, but the new bead soon lifts. The old sealant has to come out completely.
Do you have sealant for grey or black windows?
Yes, we choose a colour to suit the frame. Grey and black frames get grey or black sealant, and wood-effect frames normally suit brown.
How much does window mastic cost in Windmill Hill?
Size, access and the old material all affect the cost. Call for a quick quote and we’ll talk you through it.
Do you take out the old sealant first?
Yes, always, and completely. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
What the job involves on each surface
Timber windows & doors
On period timber windows, traditional sand mastic is sometimes the better choice. We will tell you which suits your home.
Window sills
Where a sill meets brick or render, the ends often crack first. We reseal them so rain can’t run into the wall.
How to look after the new joints
Once the sealant has cured, a few habits help it last:
- Walk round the house once a year and look at the joints
- Wipe condensation off the frames
- Repaint timber before it’s bare
- Do not use solvent cleaners on the joint
Keep sill grooves and drainage slots clear, so water can run away instead of sitting against the joint.
Water trapped behind a failed joint can start rot in timber frames and sills. Rotten timber needs a joiner, not a sealant, so it pays to reseal before that happens.
Why it’s worth doing now in Windmill Hill
Working on frames from a ladder with a sealant gun isn’t easy, especially on upper floors. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Around Windmill Hill, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
What you get with us
- A choice of colours where the product allows
- We never seal over old sealant
- Sealant colour chosen to suit
- Full insurance on every job
What affects the cost of window mastic
Some jobs are bigger than they look, and some smaller. The main factors:
- How much there is to do
- The type of sealant required
- How easy the joints are to reach
- Any working-time requirements on site
The cost depends on the size of the job, how much old material has to come out and how easy the joints are to reach. We give a clear quote before work begins.
What we need to know
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- Access, such as stairs, a lift or height
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
- The rough size of the job
For a quote, ring 0345 464 0079 or email us with the location and a short description of the problem. We’ll give you a clear quote before any work starts.