Buckinghamshire · England
Window & door mastic in Radclive, Buckinghamshire
Our applicators work in Radclive on mastic around window and door frames, sills and patio doors. Old sealant removed completely, joints prepared properly and every job guaranteed for a year.
- Mastic that is falling out in pieces
- Water coming in at the bottom corners of a door
- Gaps where the sill meets the wall
Different surfaces, different methods
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 that is a job for a joiner.
Patio & French doors
Water at the foot of a door frame isn’t always the mastic: blocked drain slots, worn brush seals and threshold details can let water in too. We check before we reseal.
How we handle window mastic in Radclive
Behind a thin line of old mastic there’s sometimes a deep void. Filling it with sealant alone leaves a joint that cannot move properly, so we fit backing rod to set the right depth. The sealant then grips the two sides it should. If you’re dealing with draughts coming in around windows and doors and leaking joints at the ends of sills, we can put it right.
Somewhere as small as Radclive, older homes often have timber frames set in stone or brickwork. Older buildings like these don’t always suit modern silicone, so the sealant has to be chosen to suit the building.
We guarantee the work for a year. If something isn’t right with it in that time, tell us and we will put it right.
- Place
- Radclive (MK18)
- Wider area
- Buckinghamshire
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
DIY sealant or a professional job?
If you are set on DIY, put the effort into preparation: take out all the old sealant, make sure the joint is clean and dry, and give it the full cure time. If it doesn’t work out, we can still put it right.
A careful DIYer can reseal a simple joint, 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.
Windows and doors in Radclive
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. With historic houses such as Stowe House (about 2.1 miles north) nearby, there’s older building stock in the area around Radclive as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
If you look after a building such as Royal Latin School, larger buildings have plenty of frames, and the mastic around each one ages.
Radclive is about 1 mile west of Buckingham, in Buckinghamshire. We provide window mastic to homes and businesses in Radclive and the surrounding area, as part of our work across Buckinghamshire. Our Buckinghamshire coverage runs to 263 places, Radclive among them. There’s also a page for Oxford, roughly 20 miles from Radclive.
Every address in MK18 is covered for window mastic, from the main roads to the quietest streets. We also cover the places around Radclive: Chackmore (1 mile north-east), Water Stratford (2 miles west), Shalstone (3 miles north-west) and Dadford (3 miles north). We also work in nearby towns such as Aylesbury (15 miles south-east), Elmhurst (15 miles south-east), Haydon Hill (14 miles south-east), Quarrendon Estate (14 miles south-east), Fairford Leys (15 miles south-east) and Winslow (7 miles south-east).
What’s near Radclive
We work in homes and buildings around Robin Hood pub and the streets around them. Well-known places in the area include Buckingham Community Hospital (1.3 miles east) and Buckingham Castle (1.1 miles east). The countryside around Radclive includes Buckingham Sand Pit.
Quotes for window mastic in Radclive
You’ll get a clear quote before we start. It takes into account:
- Any mould that needs treating
- The amount of work
- How many areas need sealing
- Whether old sealant or filler has to be cut out
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part, and we’ll explain the quote if you ask.
What to tell us for a quote
Before you ask for a quote, have a think about:
- The rough size of the job
- Pictures of the joints, sent by email
- Whether it’s a home or a business
- Any previous sealing or DIY work
Need a quote? Please phone 0345 464 0079 or drop 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.
Radclive: your questions answered
Is Radclive in your area for window mastic?
Yes. We work across London and the South East, and Radclive is part of that. You can ring 0345 464 0079 or email us and let us know what needs doing.
Is window mastic in Radclive guaranteed?
All our work, in Radclive and everywhere else, comes with a 12-month guarantee. We are fully insured, and an ARBOMaster approved applicator.
Will new mastic stop draughts?
If the draught is coming in around the frame, yes. If it’s coming through the window seals, we will tell you.
Can you do the inside joint as well?
Yes. Draughts often come through the inside gap too, so sealing both is often worthwhile.
Is the new sealant paintable?
Most silicone cannot be painted. Let us know beforehand, and we’ll use a paintable product where it suits.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
I rent my home. Can I book you?
We are happy to deal with the tenant, landlord or agent. Just make sure your landlord agrees.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
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. The work normally takes a few hours for a handful of frames, longer for a whole house. In a small place like Radclive, access is generally the main thing to plan. For outside work, also let us know about exposed walls and any outbuildings involved.
- We start by checking each window and door with you.
- Next the failed sealant is cut away and the joint cleaned.
- Where gaps are deep, backing rod goes in first.
- We apply a weatherproof sealant to match the frame and tool it neatly.
- We clear up and check every joint is fully closed.
Getting ready for the visit
- Let us know about parking restrictions
- Let us know about stairs, lifts or work at height
- Move anything stored near the joints
How to get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints, and email pictures if that’s easy.
Related advice
When it is not the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Worn gaskets, brush seals or a door that has dropped
- Condensation trapped between the panes
- Faulty window hardware
If you’re not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
Surfaces we seal
- uPVC windows
- Patio & French doors
- Composite doors
- Aluminium frames
- Timber windows & doors
- Window sills
Also near Radclive
More services for Radclive
Signs you need window mastic in Radclive
Some failures date back to when the windows were fitted. Sealant run over dust, wet brick or loose mortar never bonded as it should, so it comes away long before its time.
Common reasons people contact us include:
- Cracked sealant at the sill ends
- Cracked or shrunken mastic around the frame
- White mastic on grey or black frames
- Damp patches on the reveal after heavy rain
If you live in an older home near Church of St John, the joint between an old wall and a newer frame is usually the first place rain gets in.
Comparing quotes
- How the colour is chosen
- What happens if the job turns out different
- Whether they’re fully insured
- What guarantee comes with the work
Why act early in Radclive
Once mastic fails, rain can get between the frame and the wall. Left long enough, it can stain inside walls, spoil plaster and rot wooden frames. A reseal is a much smaller job. Around Radclive, older homes often have timber in their floors and frames, where water from a failed joint can cause rot if it’s left.
What it costs depends on the amount of work, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
What you get with us
- We agree the colour with you first
- Domestic, commercial and hotel work
- Colour picked to suit the job
- 180+ five-star Google reviews
Read what affects the cost or customer reviews.