Greater London · England
West Hendon Sand Mastic
Sand mastic in West Hendon from a team with over 20 years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Cracked mastic round a front door frame
- Draughts and rain around sash boxes
- Cement or filler used on old window joints that has cracked
About our sand mastic in West Hendon
If your home is listed or in a conservation area, check with your local planning authority whether consent is needed for work to windows. Sand mastic is often favoured as a like-for-like material. We work on sash and case windows, timber door frames and period & listed homes, and people most often call us about mastic that needs renewing before redecorating and cracked mastic round a front door frame.
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 West Hendon as anywhere.
You are covered for a year from the day we finish. If there’s a problem with it, please ring 0345 464 0079 or send us an email.
- Place
- West Hendon (NW9, NW4)
- Region
- Greater London
- Cover
- A year, on every job
- Quote
- A clear price before work begins
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in West Hendon
Can you help a landlord with a rental near Hendon station?
Yes. We work for letting agents and landlords as well as homeowners, and several properties can go on one quote. You can phone 0345 464 0079 or send us an email with the details for a clear quote.
Is parking a problem for a job in West Hendon?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Is sand mastic better than silicone for my windows?
That depends on your windows. On many period windows, sand mastic looks right and suits the building and newer frames normally get a flexible sealant.
How long does sand mastic take?
It depends on the size of the job, but most jobs take a few hours per window, depending on the condition of the joints. We’ll tell you when we quote.
Are you ARBOMaster approved?
Yes. We are approved under the ARBOMaster scheme.
What do you need from me for a quote?
Where the job is, what the problem is and roughly how big it is. If you can, email a few photos.
When will the new mastic be hard?
Not straight away. It skins first and hardens fully later, and we will tell you what to expect.
Is there any odour?
That depends on the sealant. Some products have a noticeable smell, others very little, and any smell fades as they cure.
Honest limits
Before booking, it’s worth knowing the limits:
- Sashes that rattle, stick or will not open
- Planning or listed building consent (your local planning authority decides)
- Decayed frames that need repair
If in doubt, ring 0345 464 0079 or send us an email and we will say what we think before booking.
Where we work in West Hendon
- Tenement windows
- Stone surrounds
- Timber door frames
- Period & listed homes
- Sash and case windows
- Brick reveals
Quotes for sand mastic in West Hendon
Call for a quick quote. What matters most is:
- How much old sealant there is and how hard it is to remove
- Whether there’s mould to deal with
- How much there is to do
- Any working-time requirements on site
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll explain what it covers.
What to tell us for a quote
Photos help, but a description is a good start. Please mention:
- The rough size of the job
- A few pictures by email, if you can
- Access, such as stairs, a lift or height
- If someone has resealed it before
Every job is quoted individually. Just call 0345 464 0079 or send us an email with the details, and photos are welcome.
How it works
When we arrive, we start by going over the job with you, so you know exactly what we’re doing. Surfaces next to the work are protected before any work starts. The work usually takes a few hours per window, depending on the condition of the joints. 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.
- First we agree which joints need doing.
- Old mastic and any loose material are raked out.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Getting ready for the visit
- Let us know about stairs, lifts or work at height
- Where the joints are inside, avoid wetting them before we arrive
- Mention any sign-in or site rules at work premises
How to get a quote
Want a quote for sand mastic? Please ring 0345 464 0079 or drop us an email with a few details. We will explain what we’d do and give you a clear price before any work starts.
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Signs you need sand mastic in West Hendon
Decorating can disturb tired mastic. Many people find it crumbling when they prepare the windows, which is a good time to renew it.
Look out for any of the following:
- Crumbling sand mastic round a window
- Wind and rain getting in round a sash window
- A silicone bead on a sash window that spoils the look
- Open joints round the window box
For an older house near a landmark such as St Matthias the Apostle church, frames set in older brick or stone need a sealant that suits the wall as well as the frame.
Before you book anyone
- How the joint is cleaned and prepared
- What insurance they hold
- Who turns up on the day
- How hidden problems are handled
West Hendon homes and the weather
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. Historic houses like Heath House (about 3.2 miles south-east) are a reminder that the area around West Hendon 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.
West Hendon 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, cracked sand mastic around sash windows lets in the draughts tenants complain about.
West Hendon is about 2 miles north of Neasden, in Greater London. West Hendon gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Our Greater London coverage runs to 764 places, West Hendon among them. For nearby work, see our London page, about 9 miles away.
All of 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. West Hendon sits on or near the A5, which makes travel easy. If you are just outside West Hendon, we cover The Hyde (1 mile south), 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 West Hendon
Around West Hendon, our work takes us to homes and buildings near Woodfield School, Moon Under Water pub and Brampton College, among other places. West Hendon has its own railway station: Hendon station. A little further out are Brent Cross Shopping Centre (1.1 miles east) and Church Farmhouse Museum (1 mile north-east). Open spaces near West Hendon include Masons Field and Parliament Hill.
DIY versus a professional finish
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, then guaranteed for a year.
Too much sealant is as bad as too little. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Places near West Hendon
What else we do in West Hendon
Surface by surface
Tenement and terrace windows
Rows of sash windows on tenements and terraces often need renewing together. We can do one window or several.
Sash and case windows
Most of our sand mastic work is on sash windows. We renew the mastic round each box.
Why act early in West Hendon
Not every draught comes from the sashes themselves. Open mastic joints round the box can let air in, and renewing the mastic closes them. In a flat in West Hendon, 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.
There are no prices on our website, because the cost depends so much on the job itself. Call for a quick quote.
Why book with us
- We never seal over old sealant
- Sanitary silicone with an anti-fungal additive in wet areas
- 180+ five-star Google reviews
- 20+ years of sealant experience