Greater London · England
Sand Mastic in The Burroughs
Sand mastic across The Burroughs and nearby, with every bit of old sealant taken out first.
- Crumbling sand mastic round a window
- Draughty sash windows at the surround
- Modern sealant on a period surround
Sand mastic in The Burroughs, done properly
A silicone bead around a sash window can look out of place and does not suit the building. Sand mastic gives a finish that matches the age of the house and we can swap the silicone for it. Common call-outs are for mastic dropping out of the joint and cracked mastic round a front door frame, on timber door frames, sash and case windows and period & listed homes.
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 The Burroughs as anywhere.
All of our work is guaranteed for twelve months.
- Place
- The Burroughs (NW4, NW9, NW11)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- A clear quote up front
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How the job changes by surface
Brick reveals
Gaps between frame and brick let in rain and draughts. New mastic seals the gap.
Stone surrounds
The stone is treated with care while raking out the old mastic.
Honest limits
A few problems are outside what sealant work can do:
- Masonry that needs repairing
- Broken panes
- Timber that has rotted
If in doubt, phone 0345 464 0079 or email us and we’ll say what we think.
Where we work in The Burroughs
- Timber door frames
- Sash and case windows
- Stone surrounds
- Period & listed homes
- Tenement windows
- Brick reveals
DIY sealant or a professional job?
A DIY attempt does not rule out a professional job. We cut it out and start again.
The difference is mostly in the preparation and the product. We take joints back to clean, dry surfaces, and the sealant is matched to the joint and its conditions.
Keeping the joints in good condition
A little care helps the new joints last. Our advice:
- Renew mastic before redecorating the windows
- Check the mastic when you check the paintwork
- Have rotten timber repaired before new mastic goes in
- Leave the new mastic unpainted
Make sure water drains away from the window surround. Constant wetting wears the mastic faster.
Once mastic starts to crumble, rain gets in. That water can reach the timber frame and the wall so early renewal protects both.
What we do, step by step
Every visit runs the same way: we look at the joints together, protect the area around them, do the work and tidy away. Most jobs take a few hours per window, depending on the condition of the joints. In The Burroughs, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- We check the window surrounds and agree which joints need renewing.
- We rake out the old mastic and clean the joint.
- We pack any deep gaps so the mastic sits at the right depth.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- The finish is dressed so it sits neatly against the stone or brick.
Preparing for the visit
- Mention any parking rules near the property
- Tell us about any water getting in
- Mention any sign-in or site rules at work premises
How to get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is.
Advice
Windows and doors in The Burroughs
Historic houses like Heath Hall (about 2.6 miles east) are a reminder that the area around The Burroughs has older buildings as well as new. 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. 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.
The Burroughs is in London, so parking needs planning: let us know about parking bays, permits or a driveway. If you let a flat or house near Hendon station, older sash windows in a rental need their mastic kept sound to keep the weather out. Homes close to St Mary'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.
The Burroughs is about 2 miles south-east of Burnt Oak, in Greater London. The Burroughs gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a one-year guarantee. 764 places in Greater London are on our list, from the larger towns to small villages. There’s also a page for London, roughly 8 miles from The Burroughs.
Jobs for sand mastic in NW4, NW9 and NW11 is quoted and booked the same way as anywhere else. Streets in the area include Bell Lane, Eaton Road and Lodge Road. The Burroughs is on the A41, which makes it straightforward to reach with everything needed for sand mastic. Close by, we work in Hendon (1 mile south-east), Colindale (1 mile west), Brent Cross (1 mile south-east), West Hendon (1 mile south-west) and The Hyde (1 mile south-west). Within a short drive, we also cover London (8 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (6 miles south-east) and Shoreditch (8 miles south-east).
Local landmarks in The Burroughs
Typical jobs here are in homes near The Claddagh Ring pub, Brampton College and Kisharon College and the streets around them. The nearest railway station is Hendon station, about 0.8 miles south-west of the centre. A little further out are Church Farmhouse Museum (less than half a mile north) and Brent Cross Shopping Centre (0.8 miles south). The countryside around The Burroughs includes Parliament Hill and Darland's Lake.
Nearby places to The Burroughs
More services for The Burroughs
How we quote for sand mastic
For a quick quote, just ask. The main things that affect it are:
- Whether old sealant or filler has to be cut out
- How easy the joints are to reach
- How many areas need sealing
- Any mould that needs treating
The cost depends on how much there is to do, how much old material has to come out and access to the work. You will have a clear quote before any work starts.
Helping us quote
Before you ask for a quote, have a think about:
- If it’s domestic, commercial or a hotel
- What’s wrong with the joints now
- The rough size of the job
- The address or postcode of the job
Every job is quoted individually, so the first step is telling us about yours. Simply call 0345 464 0079 or email us and describe the job, and photos are welcome.
Why it’s worth doing now in The Burroughs
An open joint round the frame lets weather in. Left, water can reach the timber and the wall so renewing it early protects the window. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in The Burroughs, the repair is bigger than the sealant job would have been.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all make a difference, and we’ll explain the quote if you ask.
Why us?
- Experience in homes, commercial sites and hotels
- Every job guaranteed for a year
- An ARBOMaster approved applicator
- Old sealant always removed completely
Read our cost guide and our reviews.
Questions from The Burroughs
Do you cover The Burroughs for sand mastic?
Yes. We work across London and the South East, and The Burroughs is part of that. You can call 0345 464 0079 or send us an email and let us know what needs doing, and we’ll give you a clear price.
Can parking be tricky for a visit in The Burroughs?
Parking in The Burroughs, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can I do it myself?
It depends on the job. Work at height, movement joints, fire-rated gaps and large areas are best left to a professional.
How long does sand mastic take?
Typically it takes a few hours per window, depending on the condition of the joints. Larger jobs naturally take longer.
Will you leave a mess?
Tidy work is part of the job. Nearby surfaces are protected, and the area is left clean when we finish.
How do I get a quote for sand mastic in The Burroughs?
We don’t publish prices, because the cost depends on the job: its size, the old material, access and the product needed. You will get a clear quote before we start.
Is the work guaranteed?
Our 12-month guarantee applies on every job.
Is it OK to seal over old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.