Kent · England
Colt's Hill Window Mastic
Window mastic across Colt's Hill and nearby, with every bit of old sealant taken out first and a 12-month guarantee.
- White mastic on grey or black frames
- Old mastic that has gone black or come away
- Damp patches on the reveal after heavy rain
Looking after it afterwards
So the new joints stay in good condition:
- Use gentle cleaners on frames and sealant
- Avoid harsh chemicals near the mastic
- Avoid blasting the frames with a pressure washer
- Keep paint off silicone joints
Check the drainage slots in the frames are not blocked, so water can run away instead of sitting against the joint.
On timber windows, water behind the joint can lead to rot. Once wood has rotted, it needs repair before it can be sealed, so early resealing is worth it.
Window mastic for homes and businesses in Colt's Hill
Whether it’s one leaking patio door or every frame on the house, the work is priced before anything is done. To get one, ring 0345 464 0079 or email us with the number of frames and any access details. If you have whistling draughts around closed windows and cracked or shrunken mastic around the frame, we can help, whatever the surface.
Homes in small places like Colt's 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.
All our work comes with a 12-month guarantee, wherever you are in Kent.
- Place
- Colt's Hill (TN12)
- Region
- Kent
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What the job involves on each surface
uPVC windows
We clean the frame edge carefully so the plastic is not marked, then the sealant goes in between frame and wall.
Timber windows & doors
Where timber has rotted at the joint, it needs repairing first. If we find rot, we will tell you before going ahead, as a joiner will need to deal with it.
What affects the quote in Colt's Hill
The quote reflects the job in front of us. We take into account:
- Working hours on commercial sites
- Which sealant suits the joint
- The size of the job
- How many areas need sealing
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
What to tell us for a quote
There’s no need for technical detail. It helps if you can tell us:
- Any access issues, like height or stairs
- The rough size of the job
- The problem you’ve noticed
- Where the property is
Want a quote for window mastic? Please phone 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.
Questions from Colt's Hill
Can you help a landlord with a rental near Paddock Wood station?
Yes, landlords and agents are among the people we work for. You can ring 0345 464 0079 or email us with the details for a clear quote.
Can you do window mastic in Colt's Hill?
Yes, Colt's Hill is within the area we cover. We work across London and the South East. You can call 0345 464 0079 or send us an email and tell us what needs doing, and we will send you a clear quote.
When is the sealant fully cured?
Most sealants are touch-dry well before they’re fully cured. We’ll tell you how long to leave the joint before we leave.
Will resealing my frames help with draughts?
Yes, where the draught is at the frame edge. We check where the draught is before any work starts.
Can I paint over the new sealant?
That depends on the product. Silicone isn’t paintable, but some hybrid sealants are. Mention any painting plans before work begins.
How much does window mastic cost in Colt's Hill?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Are you insured?
Yes. Full insurance covers our work, and we can confirm the details when we quote.
Is it messy?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
Can I do it myself?
Sealing over old silicone is the commonest DIY error. New silicone won’t bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, and the work is guaranteed for a year.
Common problems we fix in Colt's Hill
Plenty of failed mastic was poorly applied in the first place. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Keep an eye out for any of the following:
- Rushed sealant from a window installation
- Old mastic that has gone black or come away
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
Managing a site like Capel Primary School? Then its window and door frames need their mastic kept sound, just like a home’s.
Questions to ask before booking
- Who does the work, and how experienced they are
- What product goes in the joint
- When the joint can take water or movement
- Whether all the old sealant comes out first
Window mastic in Colt's Hill: local notes
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.
Rented homes near Paddock Wood station change hands often, and sound mastic around windows and doors keeps out the draughts and damp that tenants notice first. For an older house near a landmark such as Five Oak Green Church, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Colt's Hill is about 4 miles south-east of Tonbridge, in Kent. Across the TN12 area, we cover window mastic for homes and businesses. Across Kent, we cover 922 places, Colt's Hill among them. You can also see our page for Crawley, roughly 24 miles from Colt's Hill.
Here we cover the TN12 postcode area for window mastic. Whether your property is on Colts Hill and Maidstone Road or anywhere close by, our applicators can take on the job. We also cover the places around Colt's Hill: Capel (1 mile west), Five Oak Green (1 mile north), Paddock Wood (1 mile east), Matfield (1 mile south-east) and Whetsted (1 mile north-east). Further out, we also cover Maidstone (10 miles north-east), Sevenoaks (11 miles north-west), Royal Tunbridge Wells (5 miles south-west), Tonbridge (4 miles north-west), Kings Hill (7 miles north) and Foley Park (11 miles north-east).
Near you in Colt's Hill
Typical jobs here are in homes near The Dovecote Inn, Foal Hurst Wood and Mascalls School. The nearest railway station is Paddock Wood station, roughly 1.5 miles north-east of the centre. Nearby you’ll also find Tonbridge Castle (4.1 miles north-west) and The Hop Farm Museum (2.3 miles north-east). Not far away are Barden Lake and Tudeley Woods RSPB reserve.
How it works
Our applicators work methodically: protect, prepare, seal, tidy. Typically it takes anything from an hour or two to a full day, depending on how many frames there are. In a small place like Colt's Hill, access is normally the main thing to plan. 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.
- The old mastic is cut out and scraped back to clean surfaces.
- Deep gaps get closed-cell backing rod to set the depth.
- 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.
Preparing for the visit
- On commercial sites, let us know about site rules
- Clear items away from the joints we are working on
- Tell us about any water getting in
Ask for a quote
We quote each job on its own, so start by telling us what you need. Simply call 0345 464 0079 or send us an email and describe the job.
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Work for landlords, hotels and businesses
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
From a single let to a portfolio, you get the same standard of work: the old material taken out, careful preparation and a 12-month guarantee.