Greater London · England
Oakwood Sand Mastic
Window and door surrounds in Oakwood need attention? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Cement or filler used on old window joints that has cracked
- Window mastic to renew ahead of painting
- Gaps between timber frames and stone or brick
Sand mastic for homes and businesses in Oakwood
We work across Oakwood renewing sand mastic on sash windows and doors. Each joint is raked out, prepared and pointed by hand, finished to suit the masonry. If you have draughts and rain around sash boxes and modern sealant on a period surround, we can help, on period & listed homes, tenement windows and timber door frames alike.
Many London homes are flats, with windows high above the street. In a converted house or block, the lease generally says who is responsible for the windows, so it’s worth checking before booking.
All our work comes with a one-year guarantee.
- Place
- Oakwood (N14, N21, EN2)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
How the visit works
We keep the work tidy and contained to the area we are working on, so you can get on with your day. The job usually takes a few hours for a single window, longer for several, and we tell you how long to leave it before we go. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. Mention any building rules, key holders or managing agents when you book.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Getting ready for the visit
- Try not to wet indoor joints just before the visit
- Plan for the work area to be out of bounds to pets and children
- Move anything stored near the joints
Get a quote
The more we know about the job, the more useful the quote. Let us know the location, the problem and roughly how many joints.
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Can I do it myself?
What a professional job adds is preparation and the right product. We take joints back to clean, dry surfaces, and the sealant is chosen for how the joint moves and where it is.
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
Common problems we fix in Oakwood
Timber swells and shrinks with the weather. The movement cracks the mastic over time.
If you can see any of these, it’s time to have the joints looked at:
- Old sand mastic that has cracked, crumbled or fallen out
- Silicone on a period window that looks wrong
- Weathered mastic on the most exposed windows
- Cracked mastic round a front door frame
Schools such as Wolfson Hillel Primary School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s.
Comparing quotes
- What the cure time is
- What product goes in the joint
- Whether they seal over old material or remove it
- What guarantee comes with the work
Oakwood: your questions answered
Can you do sand mastic in Oakwood?
Yes. We work across London and the South East, and Oakwood is part of that. You can ring 0345 464 0079 or send us an email and tell us what needs doing.
Can you help a landlord with a rental near Winchmore Hill 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.
Will you leave a mess?
Not at all. The area is protected while we work and cleaned up afterwards.
Do the sealants smell?
Possibly a little. It fades as the sealant cures.
Do you guarantee sand mastic work?
Our 12-month guarantee applies to all our work.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
Can you do several jobs on one visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
What does sand mastic cost?
Size, access and the old material all affect the cost. Call for a quick quote.
Landlords, agents and businesses in Oakwood
Failed sealant is one of the commonest items on a check-out report, and it’s easy to sort out between tenants. Several properties can be quoted together.
For anyone letting property in or around Oakwood, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs, and pictures by email help.
When something else is needed
New sealant cannot fix everything, and we’ll tell you before work begins. Sealant won’t put right:
- Rotten sashes, sills or window boxes (a joiner’s job)
- Masonry that needs repairing
- Putty and glazing repairs
If in doubt, call 0345 464 0079 or email us and we’ll say what we think before booking.
Joints and surfaces we work on
- Stone surrounds
- Brick reveals
- Period & listed homes
- Sash and case windows
- Tenement windows
- Timber door frames
Oakwood homes and the weather
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
As a London address, Oakwood can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Winchmore Hill station? Then older sash windows in a rental need their mastic kept sound to keep the weather out.
Oakwood is about 2 miles west of Enfield, in Greater London. Jobs in Oakwood get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Oakwood is one of 764 places in Greater London we cover. Our London page covers work nearby, about 10 miles away.
Our applicators cover all of the N14, N21 and EN2 postcode area for sand mastic. We cover properties on Ivy Road, Green Road and Chase Road. We also cover the places around Oakwood: World's End (1 mile east), Osidge (1 mile south-west), Southgate (1 mile south), Grange Park (1 mile east) and East Barnet (1 mile south-west). Larger places within reach include London (10 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (8 miles south) and Shoreditch (8 miles south).
Around Oakwood
Typical jobs here are in homes near The New Crown pub, Oakwood Park and Southgate School. Oakwood’s nearest station is Winchmore Hill station, about 1.3 miles south-east. Nearby you will also find Grand Arcade (2.9 miles south-west) and Broomfield House Museum (1.9 miles south). Green spaces nearby include Oakleigh Park Rail Cutting and Darland's Lake.
Surface by surface
Sash and case windows
Sash windows are where we do most sand mastic work. We renew the mastic round each box.
Stone surrounds
Sand mastic sits naturally against stone. It finishes to look like part of the surround.
What affects the cost of sand mastic
You’ll get a clear quote before we start. It’s based on:
- The product the joint needs
- Any working-time requirements on site
- How easy the joints are to reach
- The number and length of the joints
Homes and businesses are quoted the same way: how much there is to do, how we reach it and what it needs. Ask us for a quote and we’ll go through it with you.
What to tell us for a quote
There’s no need for technical detail. Just tell us:
- The rough size of the job
- The address or postcode of the job
- Whether it’s a home or a business
- Any access issues, like height or stairs
We do not publish a price list, because every job is different. Instead, we give you a clear price for your job. To arrange one, ring 0345 464 0079 or email us.