Buckinghamshire · England
Great Kimble Window Mastic
Window mastic for Great Kimble, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Rushed sealant from a window installation
- Water coming in at the bottom corners of a door
- Black, perished sealant on frames
Window mastic in Great Kimble
Whether it’s one leaking patio door or every frame on the house, you will get a clear quote before work begins. To get one, call 0345 464 0079 or send us an email with the number of frames and any access details. If you have draughty joints inside around the window and untidy mastic left by window fitters, we can help.
Around Great Kimble, many homes face open ground, so their windows and doors take the full weather. Exposed frames and sills lose their mastic sooner than sheltered ones.
There’s a 12-month guarantee on every job.
- Place
- Great Kimble (HP17)
- Wider area
- Buckinghamshire
- Guarantee
- 12 months on all our work
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
There’s no need to move everything out before we come, just the space around the work. We protect the rest, and the job takes a morning for a couple of windows and a door in most cases. Somewhere as small as Great Kimble, access is often the only tricky part. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We start by checking each window and door with you.
- The old mastic is cut out and the surfaces cleaned back.
- We fit backing rod in deep gaps so the sealant is the right depth.
- A flexible, weatherproof sealant is applied in a colour to suit the frame.
- Every joint is checked before we leave.
How to prepare
- Where the joints are inside, avoid wetting them before we arrive
- Mention if the joints have been sealed before
- Clear items away from the joints we are working on
Getting a quote
We quote each job on its own. Just call 0345 464 0079 or email us with the details, and photos are welcome.
Read more
Nearby places to Great Kimble
More services for Great Kimble
DIY sealant or a professional job?
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
If you’re set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Surface by surface
Window sills
The end joints of a sill tend to fail before the rest. A tight seal at each end keeps rain out of the wall.
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.
Your questions about window mastic in Great Kimble
Do you cover Great Kimble for window mastic?
Yes. Our work covers London and the South East, and Great Kimble is part of that. You can phone 0345 464 0079 or drop us an email and tell us what needs doing.
Do you cover smaller places like Great Kimble?
Yes, Great Kimble is covered. We work across London and the South East, and smaller places are part of that. The journey is planned ahead, so it helps to know about access.
Can you work on commercial sites?
Yes. We’ve worked for hotels, offices and other businesses, and we are fully insured.
What does window mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, phone 0345 464 0079 or email us and tell us what needs doing and where.
Is it OK to seal over old sealant?
No, and we never do. It may look fine at first, but the new layer lifts away from the old one. Removing the old sealant completely is the only lasting way.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we’re done.
What should I tell you?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
How long does it take to reseal the windows on a house?
It depends on access, the old mastic and the size of the frames. We’ll tell you how long your job needs when we quote.
Aftercare tips
A little care helps the new joints last. We recommend:
- Paint up to the joint, not over it
- Look round the frames every year or so
- Keep paint and stain on wooden frames in good order
- Avoid harsh chemicals near the mastic
On timber frames, keep the paintwork in good order, because bare, wet timber moves more and pulls at the joint. Keep paint off the silicone itself.
Wet, windy weather is when failed mastic shows itself, but resealing works best in dry conditions. Dealing with it when you first notice a crack avoids chasing leaks through the wet months.
Frames and glazing around Great Kimble
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.
If you let a flat or house near Little Kimble station, cracked frame mastic tends to show up as a draught or damp complaint, so it’s worth checking between lets. For an older house near a landmark such as Church of St Nicholas, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall.
Great Kimble is about 5 miles south of Aylesbury, in Buckinghamshire. Every kind of property in Great Kimble is covered for window mastic, old or new, large or small. The work is guaranteed for a year. 263 places in Buckinghamshire are on our list. There’s also a page for Oxford, roughly 18 miles from Great Kimble.
We work across HP17 for window mastic and the streets around it. That includes homes and businesses on Bridge Street, Hill View and Lower Icknield Way and the roads around them. If you are just outside Great Kimble, we cover Little Kimble (1 mile north-east), Askett (1 mile south-west), Lower Cadsden (1 mile south), Meadle (1 mile west) and Whiteleaf (1 mile south). Larger places within reach include Aylesbury (5 miles north), High Wycombe (9 miles south), Chesham (9 miles east), Marlow (12 miles south), Amersham (10 miles south-east) and Beaconsfield (12 miles south-east).
Around Great Kimble
In Great Kimble, that means homes and buildings near The Swan pub and Princes Risborough School, among other places. Great Kimble has its own railway station: Little Kimble station. Other landmarks nearby include National Paralympic Heritage Centre (3.6 miles north) and Stoke Mandeville Hospital (3.4 miles north). Open spaces near Great Kimble include Beacon Hill and Brush Hill Local Nature Reserve.
Why deal with it now?
Choosing the product is half the job. Decorators’ caulk and bathroom silicone aren’t designed for outside joints that move. A low-modulus exterior sealant keeps its stretch through hot and cold weather. Older cottages and farmhouses around Great Kimble can have timber floors and frames, where water from a failed joint can cause rot if it’s left.
Instead of a standard rate, we price the job in front of us: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why choose Mr Mastic in Great Kimble
- White, clear, grey or coloured to suit, where the product allows
- We agree the colour with you first
- Quality sealants from Arbo and Everbuild
- An ARBOMaster approved applicator
What we’re called out for in Great Kimble
Timber windows bring their own problems. Old mastic gets painted over and cracks under the paint, and the wood moves with damp as well as heat.
People usually contact us after spotting something like this:
- Untidy mastic left by window fitters
- Mastic that has split away from the wall
- Draughty joints inside around the window
- Mastic that’s falling out in pieces
Schools such as Great Kimble Church of England School are buildings too, and its window and door frames need their mastic kept sound, just like a home’s.
What your quote should include
- Whether you can choose the colour
- What product goes in the joint
- What the cure time is
- Who does the work, and how experienced they are
When something else is needed
New sealant cannot fix everything, and we’d rather say so up front. It will not solve:
- Broken hinges, locks or handles
- A failed sealed unit that has misted up
- A frame that has rotted at the joint
If in doubt, ring 0345 464 0079 or drop us an email and we’ll say what we think.
Surfaces we seal
- Timber windows & doors
- Patio & French doors
- Composite doors
- Window sills
- Aluminium frames
- uPVC windows