Greater London · England
Sand Mastic in Old Oak Common
Specialist sand mastic for Old Oak Common: the right sealant, proper preparation and a neat finish. Ask us for a quick quote.
- Tired mastic found when preparing windows for paint
- Old sand mastic that has cracked, crumbled or fallen out
- Gaps round a timber door in stone or brick
Frames and glazing around Old Oak Common
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Historic houses like Kelmscott House (about 2.5 miles south) are a reminder that the area around Old Oak Common has older buildings as well as new. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Letting a property close to Willesden Junction station? Then any sash windows need sound mastic to keep draughts and rain out. As a London address, Old Oak Common can be tricky for parking: let us know about parking bays, permits or a driveway.
Old Oak Common is about 1 mile south of Harlesden, in Greater London. Old Oak Common gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Old Oak Common is one of 764 towns and villages in Greater London where we work. Our London page covers work nearby (7 miles or so).
Jobs for sand mastic in NW10, W3 and NW26 is quoted and booked the same way as anywhere else. That includes homes and businesses on Atlas Road, Tubbs Road and Waldo Road and the roads around them. We also cover College Park (1 mile north-east), Harlesden (1 mile north), Kensal Green (1 mile east), Park Royal (1 mile west) and North Kensington (1 mile east). Within a short drive, we also cover London (7 miles east), City of Westminster (4 miles east), Marylebone (4 miles east), Kensington (3 miles south-east), St Pancras (6 miles east) and Shoreditch (7 miles east).
Local landmarks in Old Oak Common
We work in homes and buildings around Green Man Public House, Library for Iranian Studies and Star Chamber Academy, among other places. You will also find Little Wormwood Scrubs (0.8 miles east) and St Claudine's Catholic School for Girls (0.8 miles north). There’s a railway station in Old Oak Common itself: Willesden Junction station. Nearby you’ll also find Westfield London (1.7 miles south-east) and Hammersmith Hospital (0.8 miles south-east). For a walk, there’s Hanger Hill Wood and Campden Hill.
How we handle sand mastic in Old Oak Common
Sand mastic does not last for ever, leaving gaps round the window. Renewing it closes the gap and tidies the surround. We work on period & listed homes, stone surrounds and tenement windows, and common reasons people get in touch are crumbling sand mastic round a window and tired mastic found when preparing windows for paint.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Either way, the mastic between frame and brickwork is what stops draughts and rain getting in, in Old Oak Common as anywhere.
We stand behind the work with a 12-month guarantee, so you’re covered after we have gone.
- Location
- Old Oak Common (NW10, W3, NW26)
- Wider area
- Greater London
- Guarantee
- A year, on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Looking after it afterwards
A little care helps the new joints last. We recommend:
- Sort the mastic before the decorators arrive
- Check with your local planning authority if your home is listed
- Ask us before painting near the mastic
- Keep modern sealant off the mastic
Avoid painting over the new mastic, which is the traditional advice. If you’re redecorating, ask us first.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
Different surfaces, different methods
Brick reveals
Brick reveals round timber windows are often pointed with sand mastic. It gives a traditional finish.
Stone surrounds
We take care not to mark the stone when the old mastic comes out.
Also near Old Oak Common
What else we do in Old Oak Common
Your questions about sand mastic in Old Oak Common
Can you do sand mastic in Old Oak Common?
Yes. We work across London and the South East, and Old Oak Common is part of that. Just ring 0345 464 0079 or send us an email with a few details of the job.
Can parking be tricky for a visit in Old Oak Common?
Parking in Old Oak Common, as in most of London, takes a little planning: a visitor permit or a nearby bay makes the day run more smoothly.
Should I check with the council before work on a listed or conservation-area home?
Check with your local planning authority. They’ll tell you if consent is needed for work to your windows.
Are you fully insured?
Yes, we’re fully insured for domestic and commercial work.
What’s sand mastic made of?
Sand mastic is a traditional material for pointing round windows and doors. It combines sand with a linseed-oil-based binder.
Is sand mastic better than silicone for my windows?
For period timber windows in stone or brick, sand mastic is often the better fit. On modern frames, we’d normally use a flexible sealant.
Is it messy?
We keep the work tidy. We protect what’s around the joints, and we clear up when we are done.
What sealant do you use?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference.
When something else is needed
In fairness, there are a few things sealant won’t fix:
- Putty and glazing repairs
- Sashes that rattle, stick or will not open
- Damaged stone surrounds
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
Joints and surfaces we work on
- Brick reveals
- Tenement windows
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Timber door frames
How we quote for sand mastic
You’ll get a clear quote before work begins. It’s based on:
- How many areas need sealing
- Any mould that needs treating
- Access and height
- The product the joint needs
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Asking for a quote
When you call or email, these details help:
- How many joints, rooms or windows are involved
- The type of property
- The problem you’ve noticed
- Any access issues, like height or stairs
Every job is quoted individually, so start by telling us what you need. Just ring 0345 464 0079 or email us with the details, and pictures are welcome.
Common problems we fix in Old Oak Common
Previous repairs in cement or silicone often trap water or crack away. They do not move with the timber and we normally remove them.
These are the problems we’re asked about most:
- Window mastic to renew ahead of painting
- Mastic worn away on windows facing the weather
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
In the older streets around Church of Eritrean Orthodox Brent, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Comparing quotes
- How long the guarantee is
- Are they insured?
- What preparation is included
- Is VAT in the price?
Why deal with it now?
Draughts round a sash window aren’t always the sashes. Gaps between the frame and the wall can be just as bad and new mastic seals them. In a flat in Old Oak Common, failed sealant seldom stays inside your own four walls: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, along with when we can work on site. Call for a quick quote and we will explain what it covers.
Why book with us
- Full insurance on every job
- Anti-fungal sanitary silicone in wet areas
- We never seal over old sealant
- Over 20 years’ experience
See our cost guide and our reviews.
How it works
There is not much for you to do on the day. Point us to the joints and we will get on with it. The job generally takes a few hours for a single window, longer for several, including the tidy-up. 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 look at the surrounds with you and agree the joints to renew.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- We apply the mastic by hand and shape it.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Let us know if you’ve seen damp or leaks
- For indoor joints, keep the area dry beforehand if you can
- On commercial sites, let us know about site rules
Ask for a quote
Need a quote? Please phone 0345 464 0079 or email us and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.