Greater London · England
Sand Mastic in The Hyde
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for The Hyde, backed by a 12-month guarantee. Call for a quick quote.
- Failed mastic on an exposed elevation
- Crumbling sand mastic round a window
- Modern sealant on a period surround
How it works
When we get to you, we check the joints match what you told us. If we find something unexpected, we talk it through with you first. After that, the work takes a few hours per window, depending on the condition of the joints. In The Hyde, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- We check each window surround and the condition of the joint.
- We rake out the old mastic and clean the joint.
- Large voids are packed out.
- We point the joint with sand mastic by hand.
- The finish is dressed neatly.
Getting ready for the visit
- Mention any parking rules near the property
- Clear the area around the work
- Tell us about any previous sealing or DIY attempts
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To get started, call 0345 464 0079 or send us an email.
Advice
Sand mastic for homes and businesses in The Hyde
Sand mastic skins over fairly quickly, but it takes longer to harden fully. Traditional guidance is not to paint over it and we will advise if you’re redecorating. We work on period & listed homes, tenement windows and timber door frames, and people most often call us about cement or filler used on old window joints that has cracked and weathered mastic on the most exposed windows.
From mansion-block windows to modern glazing in new flats, London has every kind of frame. The mastic around them dries out and cracks with age, letting in draughts and water.
Whatever the size of the job, you get the same 12-month guarantee.
- Where
- The Hyde (NW9, NW4)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Landlord and commercial work in The Hyde
Landlords and agents in The Hyde can book us as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
We also work for property managers and facilities teams. We can quote a run of properties together, and we are fully insured for the work.
Places near The Hyde
Other services in The Hyde
When it isn’t the sealant
Honest advice matters more to us than a booking, so here’s what sealant can’t fix:
- Timber that has rotted
- Decisions on consent for listed homes
- Crumbling stone or brickwork round the window
If in doubt, ring 0345 464 0079 or send us an email and we’ll say what we think.
Surfaces we seal
- Period & listed homes
- Tenement windows
- Brick reveals
- Sash and case windows
- Stone surrounds
- Timber door frames
Aftercare tips
Looking after new joints is easy:
- Don’t run silicone over sand mastic
- Ask a joiner to look at soft timber first
- Renew mastic before redecorating the windows
- Inspect the joints round the windows every year or so
Make sure water drains away from the window surround. Water sitting against the mastic shortens its life.
Gaps round a sash box let in draughts and rain. Left, the gap tends to get bigger.
Questions from The Hyde
Is The Hyde in your area for sand mastic?
Yes, The Hyde is within the area we cover. We work across London and the South East. Just phone 0345 464 0079 or send us an email with a few details of the job, and we’ll give you a clear price.
I let a flat near Hendon station. Can you help?
Yes, rental work is part of what we do. Just call 0345 464 0079 or drop us an email and tell us about the property, and we’ll give you a clear price.
Is there any odour?
It depends on the product. Some smell for a while, some hardly at all.
Does someone need to be in?
We need access to the joints, so we will agree that with you when we book. For inside work, that normally means someone being in.
What guarantee comes with the work?
Our 12-month guarantee covers every job.
Can you seal over the old sealant?
No, because it fails. We remove every bit of old sealant first, so the new sealant bonds properly.
What information do you need?
Let us know what needs doing and where. We will ask anything else we need to know.
Do you take out the old sealant first?
Yes. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
How the job changes by surface
Period and listed homes
Sand mastic is the like-for-like choice for many period homes. On listed buildings, check with your planning authority first.
Timber door frames
Doors face weather and wear, so their mastic can fail sooner. It’s renewed by hand.
Should I try it myself first?
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so just mention it when you contact us.
Leave it or put it right?
An open joint round the frame lets weather in. Water can get to the frame and the masonry so renewing it early protects the window. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you are not sure whether it needs doing, call 0345 464 0079 or send us an email and we’ll give you an honest view and a quote.
Why us?
- Rated 4.9 stars on Google
- Any old sealant cut out fully, not covered over
- Quality sealants from Arbo and Everbuild
- We leave the area clean and tidy
See our cost guide or what customers say.
What sand mastic looks like in The Hyde
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. Historic houses like Heath House (about 3.2 miles south-east) are a reminder that the area around The Hyde has older buildings as well as new. Where a home is older, older timber frames in brick or stone need a different approach from a modern uPVC window.
For landlords with property near Hendon station, any sash windows need sound mastic to keep draughts and rain out. Managing a site like The Hyde School? Then larger buildings have plenty of frames, and the mastic around each one ages. The Hyde is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
The Hyde is about 2 miles north of Neasden, in Greater London. From the centre of The Hyde to the outskirts, sand mastic is available for homes and businesses alike, from flats and houses to offices and hotels. Across Greater London, we cover 764 places, The Hyde among them. For nearby work, see our London page (9 miles or so).
Every address in NW9 and NW4 is covered for sand mastic, from the main roads to the quietest streets. Sand mastic is available to properties on Alpini Road, Catkin Road and Garrick Road and the roads around them. With the A5 close by, The Hyde is simple for us to get to. Other places close to The Hyde include West Hendon (1 mile north), Colindale (1 mile north), The Burroughs (1 mile north-east), Hendon (1 mile east) and Staples Corner (1 mile south-east). Larger places within reach include London (9 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (7 miles south-east) and Shoreditch (8 miles south-east).
Landmarks near The Hyde
Typical jobs here are in homes near Moon Under Water pub, Brampton College and West Hendon Playing Fields, among other places. There’s a railway station in The Hyde itself: Hendon station. A little further out are St Andrew's Hospital (1.5 miles south-east) and Church Farmhouse Museum (1.1 miles north-east). Green spaces nearby include Parliament Hill and Darland's Lake.