Greater London · England
Window & door mastic in Biggin Hill, Greater London
Problem with your window and door frames in Biggin Hill? We cut out the old, prepare the joints and apply the right sealant.
- Draughts coming in around windows and doors
- Cracked internal joints between frame and plaster
- Untidy mastic left by window fitters
Window mastic in Biggin Hill, done properly
Homes in Biggin Hill have every kind of window: from uPVC casements to timber and aluminium, along with patio doors, French doors and sills. The sealant is chosen to suit the frame material and the wall. We work on window sills, aluminium frames and patio & French doors, and the jobs we see most are draughty joints inside around the window and draughts coming in around windows and doors.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
A 12-month guarantee comes as standard, so you’re covered after we have gone.
- Location
- Biggin Hill (TN16, BR6)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Price
- A clear price before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How it works
A visit follows a simple pattern: we check the joints, mask and protect the surrounding surfaces, carry out the job and tidy away. Most jobs take a morning for a couple of windows and a door. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We check how each frame can be reached safely.
- All the failed sealant is cut away, along with any loose debris.
- The surfaces are cleaned and left dry, and primed where the sealant calls for it.
- Backing rod fills deep voids and the sealant goes in on top.
- We tool the joint so water runs off, then clear up.
Before we arrive
- Clear the area around the work
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
Getting a quote
Want a quote for window mastic? Please ring 0345 464 0079 or drop us an email with a few details. We’ll explain what we’d do and give you a clear quote before work begins.
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Landlord and commercial work in Biggin Hill
Whether it’s one flat or a portfolio, you get the same standard of work: old sealant fully removed, joints prepared properly and a 12-month guarantee.
Landlords and letting agents in Biggin Hill can book us as well as householders. Resealing between tenancies keeps a property looking cared for before the next move-in.
FAQs for Biggin Hill
Can you do window mastic in Biggin Hill?
Yes. We work across London and the South East, and Biggin Hill is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
Do you work for landlords with property near Woldingham station?
Yes. We work for landlords and agents as well as homeowners, and several properties can be quoted together. Just call 0345 464 0079 or send us an email with the address and what needs doing, and we will give you a clear price.
Do you work on first-floor windows?
Yes, where they can be reached safely. Tell us about access when you get in touch and we will plan for it.
Can I do it myself?
Sometimes. The key is preparation: remove all the old material and work on a clean, dry joint. If it doesn’t work out, we can redo it.
Is the new sealant paintable?
It depends on the sealant. Silicone is not paintable, but some hybrid sealants are. Mention any painting plans before we start.
Is the work guaranteed?
Yes, with our one-year guarantee. Keeping drainage clear and checking the joints yearly helps them last.
What information do you need?
Where the job is, what the problem is and roughly how big it is. If you can, email a few pictures.
Will the old sealant be removed?
Yes, always, and completely. New sealant will not bond properly to old, so any old material comes out before anything new goes in.
Nearby places to Biggin Hill
What else we do in Biggin Hill
Windows and doors in Biggin Hill
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. In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking.
Homes close to St Mark's Church include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame. If you look after a building such as Oaklands Primary Academy, its window and door frames need their mastic kept sound, just like a home’s.
Biggin Hill is about 6 miles east of Caterham, in Greater London. We carry out window mastic for homes and businesses in Biggin Hill and nearby, as part of our work across Greater London. 764 places in Greater London are on our list. For nearby work, see our London page, about 14 miles away.
Jobs for window mastic in TN16 and BR6 is quoted and booked the same way as anywhere else. If you need window mastic at a property on Rushdene Walk, Mount Pleasant and Stock Hill or a nearby road, our applicators can take on the job. Being close to the A233, Biggin Hill is simple for us to get to. Nearby, we also carry out window mastic in Aperfield (1 mile south-east), Luxted (1 mile north-east), Berry's Green (1 mile east), Single Street (1 mile east) and Leaves Green (2 miles north). Within a short drive, we also cover London (14 miles north-west), Whitechapel (15 miles north), Brompton (15 miles north-west), Stockwell (13 miles north-west), Orpington (6 miles north-east) and Wimbledon (13 miles north-west).
Landmarks near Biggin Hill
In Biggin Hill, that means homes and buildings near Charles Darwin School, among other places. For rail, the closest station is Woldingham station, roughly 3.8 miles south-west. Well-known places in the area include Warlingham Park Hospital (2.7 miles west). Open spaces near Biggin Hill include Betsom's Hill and West Kent Golf Course nature reserve.
What we’re called out for in Biggin Hill
Water runs down the glass onto the sill, so the sill ends and the joint below the frame are common leak points. When that sealant fails, water gets into the wall or under the frame.
It’s worth asking for a quote if you see:
- Cold air getting in at the frame edge
- Draughty joints inside around the window
- Leaking joints at the ends of sills
- Damp patches on the reveal after heavy rain
For landlords with property near Woldingham station, sound mastic around windows and doors keeps out the draughts and damp that tenants notice first.
Comparing quotes
- When the joint can take water or movement
- Which sealant they’ll use, and why
- What preparation is included
- Is VAT in the price?
How we quote for window mastic
We do not publish a price list, because jobs vary so much. What we look at:
- How many rooms, windows or areas are involved
- Which sealant suits the joint
- Mould in or behind the old joints
- The size of the job
A failed joint rarely gets cheaper to fix by waiting. If you’re unsure, phone 0345 464 0079 or send us an email and we will give you an honest view and a quote.
Asking for a quote
A few details help us give you an accurate quote. When you get in contact, it helps to mention:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- How we’d reach the joints
- Photos by email, if that’s easy
For window mastic in Biggin Hill, phone 0345 464 0079 or send us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Why act early in Biggin Hill
Failed mastic is not a reason to replace sound windows. If the frames and glass are in good order, resealing the joints is often all that’s needed. If we find failed glass units or worn seals, we will tell you. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote and we will talk you through it.
Why choose Mr Mastic in Biggin Hill
- Anti-fungal silicone where joints get wet
- Colour agreed with you before we start
- A sealant colour to suit the surroundings
- Trusted Arbo and Everbuild sealants
Read what affects the cost and customer reviews.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Avoid harsh chemicals near the mastic
- Wipe condensation off the frames
- Keep timber frames painted
- Wash the frames with mild soapy water
Silicone cannot generally be painted, so mention any painting plans before work begins. We can use a paintable sealant where that matters.
Leaks normally show up in wet, windy weather, but resealing works best in dry conditions. Sorting cracked mastic early means the joint is sound before the bad weather.
When something else is needed
We will not take on work that won’t last, so these are the limits:
- Penetrating damp from a failed cavity tray or render
- A door that needs adjusting, rehanging or new seals
- Misting between the panes of a double-glazed unit (that needs a new unit)
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Where we work in Biggin Hill
- Timber windows & doors
- Aluminium frames
- Composite doors
- Window sills
- Patio & French doors
- uPVC windows