Greater London · England
Sand Mastic in West Kensington
Window and door surrounds in West Kensington need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Silicone on a period window that looks wrong
- Window mastic to renew ahead of painting
- Draughts and rain around sash boxes
Landlords, agents and businesses in West Kensington
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
About our sand mastic in West Kensington
For a listed home or one in a conservation area, ask your local planning authority if consent is needed before window work. Sand mastic is often favoured as a like-for-like material. If you’re dealing with mastic worn away on windows facing the weather and a silicone bead on a sash window that spoils the look, we can put it right, on period & listed homes, timber door frames and brick reveals alike.
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, which is when draughts and damp patches appear in homes in West Kensington.
Every job is covered by a one-year guarantee.
- Place
- West Kensington (W14, SW6, SW5)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before we start
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around West Kensington
In London conversions and blocks, the lease decides who is responsible for the frames, so it’s worth checking before booking. Rainfall in the South East is lower than in much of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind.
For an older house near a landmark such as St Cuthbert's, the windows may be timber, sash or later replacements, and each needs the right sealant against the wall. If you look after a building such as The Fulham Boys School, its window and door frames need their mastic kept sound, just like a home’s. West Kensington is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
West Kensington is about 1 mile south of Kensington, in Greater London. West Kensington gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages.
Every address in W14, SW6 and SW5 is covered for sand mastic. Streets in the area include Sun Road, Star Road and Field Road, all of which we cover. Close by, we work in North End (1 mile west), Brook Green (1 mile north-west), Fulham (1 mile south), Hammersmith (1 mile west) and Brackenbury Village (1 mile north-west). Further out, we also cover London (5 miles east), City of Westminster (3 miles north-east), Marylebone (3 miles north-east), St Pancras (5 miles north-east), Shoreditch (6 miles north-east) and Walthamstow (10 miles north-east).
Local landmarks in West Kensington
We work in homes and buildings around Avonmore Primary School, Gwendwr Garden and Seven Stars pub and the streets around them. For rail, the closest station is Kensington Olympia station, about 0.5 miles north of the centre. A little further out are Chelsea Stadium Tour And Museum (1 mile south-east) and Fulham Hospital (0.6 miles south-west). Open spaces near West Kensington include Campden Hill and The Long Water.
Aftercare tips
Aftercare is simple:
- Plan mastic work ahead of painting
- Keep sills and gutters clear so water drains away
- Get any rot dealt with first
- Go gently near the mastic when preparing windows
Avoid sealing over the mastic with silicone. If anything cracks, get it looked at rather than patching it.
Small cracks are a sign the mastic is ageing. Renewing it then is simpler than waiting until it falls out.
Should I try it myself first?
What a professional job adds is preparation and the right product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions.
Sealing over old silicone is the commonest DIY error. New silicone will not bond to old, so it peels away and traps moisture behind it. Everything old must be removed first.
Places near West Kensington
More services for West Kensington
Different surfaces, different methods
Tenement and terrace windows
Windows above ground floor need the right access. Tell us the height and we’ll confirm what’s needed.
Stone surrounds
Stone openings are rarely perfectly straight, so the gap is not the same all the way round. We shape it by hand to follow the stone.
West Kensington: your questions answered
Can you do sand mastic in West Kensington?
Yes. Our work covers London and the South East, and West Kensington is part of that. Just phone 0345 464 0079 or drop us an email with a few details of the job.
Can parking be tricky for a visit in West Kensington?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. That way the visit can be planned around it.
Which is right for my windows, sand mastic or modern sealant?
Sand mastic generally suits period timber windows best. Modern frames normally suit a flexible sealant, and we will explain why.
Will it make a mess?
Very little: the area around the joints is protected first, and we tidy up before we go.
How long does sand mastic take to go off?
Not right away. It skins first and hardens fully later and we will give you an idea for your job.
How do I get a quote for sand mastic in West Kensington?
There’s no set price, as it depends on the job: how much there is, what’s there now, how we reach it and what it needs. We agree the price before any work begins.
Can landlords and businesses book you?
Yes. As well as householders, we work for landlords, agents, businesses and hotels across Greater London.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply phone 0345 464 0079 or drop us an email.
Leave it or put it right?
Not every filler suits an old window surround. Sand mastic is the like-for-like choice, which can matter on listed and conservation-area homes. In London conversions, one flat’s bathroom is often above another flat’s ceiling, and a slow leak from a failed seal can end up in the flat below. Putting it right early is much less trouble.
Commercial jobs are quoted on the same basis as homes: the amount of work, the access and the products needed, plus any working-time requirements on site. Ask us for a quote and we’ll explain what it covers.
What you get with us
- Every job guaranteed for a year
- Anti-fungal sanitary silicone in wet areas
- Arbo and Everbuild products
- Over 20 years’ experience
Read our cost guide and customer reviews.
Quotes for sand mastic in West Kensington
We don’t publish a price list, because jobs vary so much. What we look at:
- Mould in or behind the old joints
- The size of the job
- Any working-time requirements on site
- The product the joint needs
What it costs depends on how much there is to do, how much old material has to come out and how easy the joints are to reach. We give a clear quote before we start.
Asking for a quote
Photos by email are helpful but not essential. Please mention:
- How many joints, rooms or windows are involved
- Pictures of the joints, sent by email
- Where the property is
- How we’d reach the joints
To get a quote, phone 0345 464 0079 or email us and tell us where the job is and what the problem looks like. You’ll have a clear quote before any work starts.
How it works
When we arrive, we look over the joints with you first, so there are no surprises. We protect the surfaces around the joints before any work begins. Most jobs take anything from a few hours to a full day, depending on how many windows. In West Kensington, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- We look at the surrounds with you and agree the joints to renew.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Tell us if parking is tricky
- Try not to wet indoor joints just before the visit
Get a quote
A good description makes for an accurate quote. Let us know the location, the problem and roughly how many joints.