Greater London · England
Oakleigh Park Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homes and businesses in Oakleigh Park and across Greater London. Fully insured, ARBOMaster approved and guaranteed for a year.
- Mastic worn away on windows facing the weather
- Wind and rain getting in round a sash window
- Open joints round the window box
Work for landlords, hotels and businesses
Water getting past a failed joint can damage the building, which is a bigger problem in a rented property. Keeping joints in good order is simple maintenance.
In hotels, rooms out of use cost money, so we plan the work room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Sand mastic in Oakleigh Park
We work across Oakleigh Park renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand for a neat, traditional finish. We work on sash and case windows, brick reveals and timber door frames, and people most often call us about a silicone bead on a sash window that spoils the look and gaps round a timber door in stone or brick.
Much of London’s older housing was built with timber sash windows, some still in place and some long since replaced. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
You’re covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or drop us an email.
- Location
- Oakleigh Park (N20, N12, EN4)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear price before work begins
- Call
- 0345 464 0079
- Updated
- 26 October 2026
How it works
The work is kept neat and contained to the area we’re working on. The job normally takes anything from a few hours to a full day, depending on how many windows. 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 each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- We fill deep gaps so the new mastic isn’t too thick.
- We point the joint with sand mastic by hand.
- We finish the mastic to a tidy line.
How to prepare
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
- Try not to wet indoor joints just before the visit
How to get a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
Read more
Your questions about sand mastic in Oakleigh Park
Do you cover Oakleigh Park for sand mastic?
Yes, Oakleigh Park is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or drop us an email and let us know what needs doing.
Can parking be tricky for a visit in Oakleigh Park?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Do you remove the old sealant?
Yes, always, and completely. New silicone does not stick to old silicone, so any old material comes out before anything new goes in.
How long does the job take?
As a guide, most jobs take anything from a few hours to a full day, depending on how many windows. Larger jobs naturally take longer, and we’ll tell you how long to expect.
Can I add another job to the visit?
Yes. Just list everything you need.
Will it make a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we are using.
Where do you work from?
Our base is in Crawley, and we work across South East England, London and Scotland.
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Leave the new mastic unpainted
- Have rotten timber repaired before new mastic goes in
- Go gently near the mastic when preparing windows
- Inspect the joints round the windows every year or so
Don’t run silicone over the new mastic. If anything cracks, get it looked at rather than patching it.
Sound mastic protects the frame. Failed mastic lets water reach the timber, which can lead to rot.
Towns and villages near Oakleigh Park
Other services in Oakleigh Park
DIY sealant or a professional job?
If you are 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.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
When something else is needed
We’ll always be straight with you, so here’s what new sealant will not do:
- Sash cords, weights and draught-proofing of the sashes
- Putty and glazing repairs
- Decisions on consent for listed homes
If you are not sure, just phone 0345 464 0079 or drop us an email and we’ll give you a straight answer.
Where we work in Oakleigh Park
- Period & listed homes
- Stone surrounds
- Tenement windows
- Brick reveals
- Sash and case windows
- Timber door frames
Different surfaces, different methods
Brick reveals
An open joint at a brick reveal lets weather in. Renewing the mastic closes it.
Tenement and terrace windows
Where a building is shared, window work may involve neighbours so it’s worth checking responsibilities.
What sand mastic looks like in Oakleigh Park
London and the South East are among the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. 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 frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
Rented homes near Oakleigh Park station change hands often, and older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to Church of St John include some older properties, and replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Oakleigh Park is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Oakleigh Park is about 2 miles south-east of Barnet, in Greater London. Whether you’re in the middle of Oakleigh Park or further out, sand mastic is available for homes and businesses alike. Oakleigh Park is one of 764 towns and villages in Greater London we cover for sand mastic. We also work in London, around 9 miles away.
Here we cover the N20, N12 and EN4 postcode area for sand mastic. Streets in the area include 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. Close by, we work in 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). We also work in nearby towns such as 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
Typical jobs here are in homes near Finchley Catholic High School, Woodhouse College and Francis Skaryna Belarusian Library and Museum and the streets around them. Nearby too are Swan Lane Open Space (less than half a mile west) and Three Horseshoes pub (less than half a mile north-west). The closest station to Oakleigh Park is Oakleigh Park station, about 0.8 miles north. A little further out are 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.
What affects the quote in Oakleigh Park
Every job gets its own quote. This is what makes a difference:
- Whether the work is at height
- How much old sealant there is and how hard it is to remove
- Any working-time requirements on site
- Whether there’s mould to deal with
We do not show prices on the website, because the cost depends so much on the job itself. For a quick quote, please phone 0345 464 0079 or drop us an email and we will talk you through it.
Helping us quote
You do not need to know the technical terms. Just tell us:
- Pictures of the joints, sent by email
- The rough size of the job
- The problem you’ve noticed
- If someone has resealed it before
We don’t publish a price list. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or send us an email.