Medway · England
Gadshill Window Mastic
Specialist window mastic for Gadshill: careful preparation, the right product and tidy work. Call for a quick quote.
- Cracked or shrunken mastic around the frame
- Untidy mastic left by window fitters
- Black, perished sealant on frames
Leave it or put it right?
Not every sealant suits a window. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. An exterior, low-modulus sealant stays flexible in sun and frost. In a small place like Gadshill, homes can be exposed to wind and rain, which finds any gap, and damp in older walls is slow to dry out.
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all make a difference, and we’ll explain the quote if you ask.
Why book with us
- Fully insured
- Sealant colour chosen to suit
- Colour agreed with you before any work starts
- One-year guarantee on every job
See how sealant jobs are priced and our reviews.
Window mastic for homes and businesses in Gadshill
If you can feel air around a shut window, the gap is often at the frame. Resealing that joint can make a room feel noticeably less draughty. Where the air is getting in through the window itself, we’ll say so. If you’re dealing with leaking joints at the ends of sills and black, perished sealant on frames, we can put it right, whatever the surface.
Outdoor sealant needs dry, clean surfaces, so work on frames around Gadshill is planned for dry weather. Let us know about access to all the frames, upstairs ones included.
There’s a 12-month guarantee on every job, whatever its size.
- Place
- Gadshill (ME3)
- Region
- Medway
- Guarantee
- A year, on every job
- Price
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Can I do it myself?
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.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
What happens on the day
When we arrive, we start by going over the job with you. Surfaces next to the work are protected before any work begins. Most jobs take a few hours for a handful of frames, longer for a whole house. Somewhere as small as Gadshill, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we look at every frame and agree the list.
- Next the failed sealant is cut away and the joint cleaned.
- We fit backing rod in deep gaps so the sealant is the right depth.
- New exterior sealant goes on in a matching colour and is tooled smooth.
- Every joint is checked before we leave.
Preparing for the visit
- Mention any parking rules near the property
- Tell us about access, such as stairs, a lift or high-level joints
- Keep pets and children clear of the area while we work
Ask for a quote
For a quick quote, get us on the phone, or email us if that is easier. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
Related advice
How to look after the new joints
So the new joints stay in good condition:
- Clear any debris from frame drain holes
- Paint up to the joint, not over it
- Wash the frames with mild soapy water
- Wipe condensation off the frames
Keep the new mastic undisturbed while it cures, for as long as we advise. Keep jet washers away from the frames.
Look out for the warning signs: split or missing mastic, gaps, damp patches inside or black mould on the reveal. If you notice one, it’s time to get the joint looked at.
What affects the quote in Gadshill
The price is agreed before any work begins. It takes into account:
- The number of rooms or windows
- How much there is to do
- Which sealant suits the joint
- Access and height
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.
What we need to know
There’s no need for technical detail. It helps if you can tell us:
- Photos by email, if that is easy
- Whether it has been sealed before
- Any access issues, like height or stairs
- Roughly how big the job is
For window mastic in Gadshill, phone 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
What window mastic looks like in Gadshill
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. Historic houses like Temple Manor (about 1.9 miles south-east) are a reminder that the area around Gadshill 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 is traditional sand mastic.
For an older house near a landmark such as Church of St John, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. Schools such as Strood Academy are buildings too, and larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Higham station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets.
Gadshill is about 2 miles north-west of Rochester, in Medway. Our applicators cover window mastic for homeowners, landlords and businesses in Gadshill and the surrounding area. Gadshill is one of 68 towns and villages in Medway where we work. Chelmsford is on our list too, around 23 miles away.
We work across the ME3 postcode area for window mastic. Whether your property is on Copperfield Crescent, Charles Dickens Avenue and Gravesend Road or a nearby road, our applicators can take on the job. Close by, we work in Higham (1 mile north), Shorne Ridgeway (1 mile west), Shorne (1 mile west), Lower Higham (1 mile north) and Mockbeggar (2 miles north-east). We also work in nearby towns such as Gillingham (6 miles south-east), Chatham (5 miles south-east), Rainham (7 miles south-east), Luton (4 miles south-east), Park Wood (7 miles south-east) and Lordswood (6 miles south-east).
What’s near Gadshill
Locally, jobs take us to homes and businesses close to Rede Common, Temple School and Sir John Falstaff Public House. The closest station to Gadshill is Higham station, roughly 1.2 miles north of the centre. A little further out are Rochester Castle (2.2 miles south-east) and French Hospital (2.4 miles south-east). The countryside around Gadshill includes Gad's Hill and Rede Common.
Landlords, agents and businesses in Gadshill
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
A neglected joint can let water reach the structure, which is a bigger problem in a rented property. Resealing at the right time is simple maintenance.
Your questions about window mastic in Gadshill
I let a flat near Higham station. Can you help?
Yes, landlords and agents are among the people we work for, and several properties can go on one quote. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Do you cover smaller places like Gadshill?
Yes, smaller places are covered as well as towns. We work across London and the South East. Just mention lanes, gates or anything else about the route when you book.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status.
Will new mastic stop draughts?
In many cases. The gap between frame and wall is a common source of draughts, and resealing inside and out closes it.
Are you fully insured?
Yes. We’re fully insured.
Do you work for hotels and businesses?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
How many windows can you do in a day?
Allow 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.
Is it OK to seal over old sealant?
No. The old sealant always comes out first.
Honest limits
A few problems are outside what sealant work can do:
- A failed sealed unit that has misted up
- A sash or casement that won’t close properly
- Penetrating damp from a failed cavity tray or render
Not sure which it is? You can call 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Timber windows & doors
- Composite doors
- Patio & French doors
- Aluminium frames
- uPVC windows
- Window sills