Kent · England
East Hill Window Mastic
Mastic around window and door frames, sills and patio doors in East Hill, with a 12-month guarantee on every job. Call for a quick quote.
- Damp patches on the reveal after heavy rain
- Cracked internal joints between frame and plaster
- Cracked sealant at the sill ends
Why act early in East Hill
Working on frames from a ladder with a sealant gun isn’t easy, especially upstairs. We cut out properly, back deep gaps and tool every joint neatly, in a sealant suited to the wall. Where a wall is exposed, as many are in small places like East Hill, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
The cost reflects the work involved, not a rough estimate. That’s why we ask about the job first and agree the price before starting.
What you get with us
- You choose the colour before work begins
- An ARBOMaster approved applicator
- Arbo and Everbuild products
- Rated 4.9 stars on Google
Read what affects the cost or what customers say.
Window mastic in East Hill
Behind a thin line of old mastic there’s sometimes a deep void. Packing it solid with sealant gives a joint that can’t flex, so deep gaps get backing rod first. That way the new bead bonds to the frame and the wall only. We work on aluminium frames, uPVC windows and patio & French doors, and people most often call us about cracked or shrunken mastic around the frame and cold air getting in at the frame edge.
Homes in small places like East Hill often stand in the open, with little to shelter their windows from wind and rain. That exposure dries out and cracks the mastic around frames and sills faster.
Big or small, it’s backed by our one-year guarantee in East Hill and across Kent.
- Location
- East Hill (TN15)
- Wider area
- Kent
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
When to call us in East Hill
Plenty of failed mastic was poorly applied in the first place. Mastic laid onto dusty, damp or crumbling surfaces never bonded as it should, so it comes away long before its time.
Any of these means the joints need attention:
- Whistling draughts around closed windows
- Sealant in the wrong colour for the frame
- Gaps left after new windows were fitted
- Draughty joints inside around the window
In the older streets around Church of Saint Mary the Virgin, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Questions to ask before you book
- Which colour the sealant will be
- What insurance they hold
- How the surfaces are prepared before sealing
- Whether VAT is included
Also near East Hill
What else we do in East Hill
DIY versus a professional finish
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
FAQs for East Hill
Can you help a landlord with a rental near Shoreham (Kent) station?
Yes. We work for landlords and letting agents as well as homeowners. Just phone 0345 464 0079 or email us with the address and what needs doing, and we’ll give you a clear price.
Is East Hill within the area you cover?
Yes, East Hill is covered. We work across London and the South East, from towns to the smallest places. Longer journeys are simply planned in advance.
Is it worth trying it myself?
You can, for simple jobs. The key is preparation: remove all the old material and work on a clean, dry joint. We can always put it right if it fails.
Do you have insurance?
Yes. Mr Mastic is fully insured, and we have been doing sealant work for more than 20 years.
Can you do upstairs windows?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote and we will plan for it.
Where is Mr Mastic based?
We work from Crawley. We cover East Hill and the rest of Kent.
Is the new sealant paintable?
That depends on the product. Some hybrid sealants can be painted; silicone can’t. Tell us if you are decorating and we will choose accordingly.
Do you have sealant for grey or black windows?
Yes. White, brown, anthracite grey, black and clear sealants are all available, so the joint suits the frame.
Surface by surface
Aluminium frames
Large aluminium doors have long joints down each side and across the head, and the threshold joint takes a lot of water. Each is cleaned, backed where deep and resealed.
Timber windows & doors
Timber moves with moisture as well as heat, so the joint must stay flexible. The paint or stain needs to be sound where the sealant meets it.
Keeping the joints in good condition
To keep the joints looking good and working properly:
- Keep timber frames painted
- Check the mastic once a year
- Make sure the drainage slots aren’t blocked
- Paint up to the joint, not over it
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Draughts get worse, not better. As the old mastic shrinks further, more air gets through, and heat escapes around the frame. Resealing closes it.
How the visit works
When we arrive, we start by going over the job with you, so there are no surprises. Surfaces next to the work are protected before work begins. The work generally takes a few hours for a few frames, or a day or more for a whole house. Somewhere like East Hill 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.
- We check each frame and agree which ones need doing.
- The old mastic is cut out and the surfaces cleaned back.
- Deep gaps are filled with backing rod to set the depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
Before we arrive
- Mention any tricky access
- Let us know about parking restrictions
- Tell us about any water getting in
Getting a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is. When it suits you, call 0345 464 0079 or send us an email.
Read more
Windows and doors in East Hill
Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Lullingstone Castle (about 2.2 miles north-west) nearby, there’s older building stock in the area around East Hill as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Shoreham (Kent) station? Then sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
East Hill is about 5 miles north-east of Sevenoaks, in Kent. East Hill gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. East Hill is one of 922 towns and villages in Kent where we work. There’s also a page for London, roughly 18 miles from East Hill.
All of TN15 is covered for window mastic, from the main roads to the quietest streets. That includes homes and businesses on Cherry Tree Grove, Ashen Grove Road and East Hill Road and the roads around them. Other places close to East Hill include Knatts Valley (1 mile south-east), Romney Street (1 mile south-west), West Kingsdown (1 mile north-east), Maplescombe (1 mile north) and Woodlands (1 mile south). Within a short drive, we also cover Maidstone (14 miles east), Dartford (7 miles north), Sevenoaks (5 miles south-west), Royal Tunbridge Wells (14 miles south), Gravesend (9 miles north-east) and Tonbridge (10 miles south).
Around East Hill
We work in homes and buildings around Kemsing Down and the streets around them. The nearest railway station is Shoreham (Kent) station, about 2.1 miles west of the centre. Nearby you’ll also find Sevenoaks Hospital (4 miles south-west) and Otford Heritage Centre (2.8 miles south-west).
What affects the cost of window mastic
Call for a quick quote. What matters most is:
- Access and height
- Whether there’s mould to deal with
- The size of the job
- How much old sealant there is and how hard it is to remove
There are no prices on our website, because the cost depends so much on the job itself. For a quick quote, please ring 0345 464 0079 or send us an email.
Helping us quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- How we’d reach the joints
- Pictures of the joints, sent by email
Asking for a quote is easy: let us know the job and the location, and roughly how big it is. Photos by email help us understand the job.