Greater London · England
Window Mastic in Oakleigh Park
Window mastic across Oakleigh Park and nearby, with old sealant always removed completely and a 12-month guarantee.
- Whistling draughts around closed windows
- Water coming in at the bottom corners of a door
- Cracked or shrunken mastic around the frame
Window mastic in Oakleigh Park, done properly
There are two joints on most windows. The external joint is the weather seal; inside, the joint between frame and plaster stops draughts and tidies the reveal. We seal one or both, depending on what’s needed. We work on timber windows & doors, composite doors and patio & French doors, and common reasons people get in touch are damp patches on the reveal after heavy rain and cold air getting in at the frame edge.
London has a lot of flats and conversions, where windows are often on upper floors. In a converted house or block, the lease usually says who is responsible for the windows, so it’s worth checking before booking.
The work is guaranteed for twelve months. If something is not right with it in that time, tell us and we’ll put it right.
- Location
- Oakleigh Park (N20, N12, EN4)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Quotes for window mastic in Oakleigh Park
Jobs vary more than people expect. The main factors:
- The number and length of the joints
- How many rooms, windows or areas are involved
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
Rather than a set price list, we price the job in front of us: the amount of work, the old material and the access. The price is agreed before we begin.
What we need to know
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- Any previous sealing or DIY work
- The address or postcode of the job
- Pictures of the joints, sent by email
- The rough size of the job
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we’ll explain what’s involved before giving you a price.
What happens on the day
At the end, we look at the finished work together and explain the cure time. The work normally takes a morning for a couple of windows and a door, depending on how much there is to do. In Oakleigh Park, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- 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.
- Deep voids are backed, then the sealant is gunned in.
- The joint is shaped to shed water and the area tidied.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about any water getting in
- Let us know about parking restrictions
Ask for a quote
For window mastic in Oakleigh Park, ring 0345 464 0079 or drop us an email. Tell us what the problem is and where, and you’ll get a clear quote before any work starts.
Advice
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Worn gaskets, brush seals or a door that has dropped
- A sash or casement that will not close properly
- Condensation trapped between the panes
If you are not sure, just call 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Timber windows & doors
- uPVC windows
- Composite doors
- Patio & French doors
- Aluminium frames
- Window sills
Places near Oakleigh Park
Also in Oakleigh Park
Landlords, agents and businesses in Oakleigh Park
Letting agents and landlords in Oakleigh Park can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
If you manage several properties in or around Oakleigh Park, jobs at different addresses can go on one quote. Send us the addresses and the work at each, and pictures by email help.
Keeping the joints in good condition
Aftercare is simple:
- Look round the frames every year or so
- Clear any debris from frame drain holes
- Don’t use solvent cleaners on the joint
- Don’t paint over the silicone
Wipe the frames with soapy water when you clean the windows, and keep solvents and harsh chemicals off the joint.
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 window mastic looks like in Oakleigh Park
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Heath Hall (about 3.5 miles south) nearby, there’s older building stock in the area around Oakleigh Park as well as newer homes. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
Managing a site like Queenswell Infant & Nursery School? Then larger buildings have plenty of frames, and the mastic around each one ages. For landlords with property near Oakleigh Park station, 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 Church of St John, the joint between an old wall and a newer frame is usually the first place rain gets in.
Oakleigh Park is about 2 miles south-east of Barnet, in Greater London. Oakleigh Park gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Oakleigh Park is one of 764 places in Greater London where we work for window mastic. London is on our list too, around 9 miles away.
All of N20, N12 and EN4 is within our area for window mastic, from the main roads to the quietest streets. You’ll find streets such as High Road, Swan Lane and Green Road, and we cover them all. Being close to the A1000, Oakleigh Park is easy for our applicators to reach for window mastic. We also cover Whetstone (1 mile east), North Finchley (1 mile south), Woodside Park (1 mile south-west), East Barnet (1 mile north-east) and Brunswick Park (1 mile east). Within a short drive, we also cover London (9 miles south), City of Westminster (8 miles south), Marylebone (8 miles south), Kensington (9 miles south), St Pancras (7 miles south) and Shoreditch (8 miles south-east).
Near you in Oakleigh Park
We work in homes and buildings around Finchley Catholic High School, Woodhouse College and Francis Skaryna Belarusian Library and Museum, among other places. Nearby too are Swan Lane Open Space (within half a mile west) and Three Horseshoes pub (within half a mile north-west). The closest station to Oakleigh Park is Oakleigh Park station, about 0.8 miles north. Other landmarks nearby include Finchley Memorial Hospital (1.4 miles south) and Francis Skaryna Belarusian Library and Museum (0.9 miles south-west). For a walk, there’s Barfield Allotments Nature Park and Highgate Hill.
Oakleigh Park questions
Do you work for landlords with property near Oakleigh Park station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
Can you do window mastic in Oakleigh Park?
Yes, Oakleigh Park is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or send us an email and let us know what needs doing.
Can you do the inside joint as well?
Yes. The outside joint keeps the weather out, and the inside joint stops draughts and finishes the reveal. We do one or both.
How do I get a quote for window mastic in Oakleigh Park?
We do not publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You’ll get a clear quote before any work starts.
Can I paint over the new sealant?
Silicone generally won’t take paint. Let us know beforehand, and we’ll use a paintable product where it suits.
Do you hold any approvals?
Yes. We are ARBOMaster approved, the scheme for applicators of Arbo sealants.
Do you remove the old sealant?
Yes, always, and completely. New sealant will not bond properly to old, so the joint is cleaned back first.
Can you do upstairs windows?
Yes, as long as they can be reached safely. Let us know about access when you ask for a quote so we can plan the job.
Different surfaces, different methods
Composite doors
If the door itself is draughty, the issue may be the door seals or hinges rather than the frame mastic. We’ll tell you if that’s what we find.
uPVC windows
The frame is cleaned with a product that will not harm the plastic, then the new bead is laid against the frame and the wall.
Why it’s worth doing now in Oakleigh Park
If you’re painting or rendering, reseal at the same time. A clean new bead makes new paint or render look finished. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble for homes in Oakleigh Park.
The cost depends on how much there is to do, how much old material has to come out and access to the work. We give a clear quote before any work starts, so you know where you stand.
What you get with us
- Anti-fungal silicone where joints get wet
- A sealant colour to suit the surroundings
- Domestic, commercial and hotel work
- Fully insured
Take a look at our cost guide and what customers say.