Greater London · England
Sand Mastic in Holland Park
Problem with your window and door surrounds in Holland Park? We cut out the old, prepare the joints and apply the right sealant, with a one-year guarantee.
- Mastic that needs renewing before redecorating
- Draughty sash windows at the surround
- Silicone on a period window that looks wrong
What we do, step by step
All our tools and materials come with us in the van, so you don’t need to buy or prepare anything. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours for a single window, longer for several. 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.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- Deep gaps are packed so the mastic sits at the right depth.
- The sand mastic is mixed and pressed into the joint by hand.
- The surface is finished to suit the stone or brick.
How to prepare
- For indoor joints, keep the area dry beforehand if you can
- Mention any tricky access
- Let us know about earlier repairs to the joints
How to get a quote
If you’re in Holland Park and need sand mastic, ring 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Related advice
How we handle sand mastic in Holland Park
Sand mastic is the traditional way to point the gap between a timber window frame and the stone or brick around it. It’s a mix of sand and a linseed-oil-based binder, applied by hand. On older homes, it suits the building far better than silicone. If you’re dealing with gaps round a timber door in stone or brick and weathered mastic on the most exposed windows, we can help, whatever the surface.
London homes have every kind of window, from timber sashes in period terraces to aluminium and uPVC in newer blocks. Over the years, the sealant around them shrinks, cracks and pulls away, letting in draughts and water.
All our work is covered by a 12-month guarantee, wherever you are in Greater London.
- Where
- Holland Park (W8, W11, W14)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- A clear quote up front
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Common questions in Holland Park
Is parking a problem for a job in Holland Park?
In much of London, parking needs planning: a visitor permit or a nearby bay makes the day run more smoothly, so mention what’s available when you book.
Do you cover Holland Park for sand mastic?
Yes. We work across London and the South East, and Holland Park is part of that. You can phone 0345 464 0079 or send us an email and tell us what needs doing.
When will the new mastic be hard?
It forms a skin fairly soon, then hardens over a longer period. The weather and joint depth both affect it.
How long does sand mastic take?
That depends on how much there is to do, but most jobs take a few hours per window, depending on the condition of the joints. We’ll give you a better idea when we quote.
Can tenants book the work?
We can work for tenants, landlords or agents. Just make sure your landlord agrees.
Do you offer different sealant colours?
Yes. Sealants come in white, clear, grey and other colours, and we’ll agree it with you first.
Do you work for letting agents?
Yes, often. Several properties can be quoted together, and between tenancies is a good time for the work.
Should I check with the council before work on a listed or conservation-area home?
Checking first is sensible. Ask your local planning authority whether consent is needed for listed or conservation-area properties.
Why deal with it now?
If you’re redecorating, renew the mastic first. Paint over cracked mastic will not stop the gaps, and the new mastic is traditionally left unpainted. In a flat in Holland Park, failed sealant seldom stays inside your own four walls: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Leaving a failed joint normally makes the job bigger, not smaller. If you are not sure whether it needs doing, call 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Holland Park
- One-year guarantee on every job
- Quality sealants from Arbo and Everbuild
- 4.9 on Google from 180+ five-star reviews
- We never seal over old sealant
Places near Holland Park
Other services in Holland Park
Keeping the joints in good condition
Joint life depends on how it’s used and looked after. We suggest:
- Ask the planning authority about consent for listed or conservation-area homes
- Sort the mastic before the decorators arrive
- Avoid patching sand mastic with silicone
- Check the mastic when you check the paintwork
Avoid sealing over the mastic with silicone. If you see a crack, ask us to take a look rather than patching it.
Crumbling mastic lets rain into the joint. That water can reach the timber frame and the wall so early renewal protects both.
Frames and glazing around Holland Park
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. With historic houses such as Leighton House (about 0.4 miles south) nearby, there’s older building stock in the area around Holland Park as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
Schools such as Holland Park School are buildings too, and the mastic around its windows and doors needs looking after like any other building’s. If you live in an older home near Church of St George, the joint between an old wall and a newer frame is usually the first place rain gets in.
Holland Park is about 1 mile north of Kensington, in Greater London. Holland Park gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. 764 places in Greater London are on our list, from the larger towns to small villages.
Postcode districts we cover here for sand mastic: W8, W11 and W14. We cover properties on Dukes Lane, Milson Road and Elsham Road. With the A402 and A4204 close by, Holland Park is simple for us to get to for sand mastic. Neighbouring places we cover for sand mastic include Kensington (1 mile south), Notting Hill (1 mile north), Shepherd's Bush (1 mile west), Notting Dale (1 mile north) and White City (1 mile north-west). Larger places within reach include London (5 miles east), Marylebone (3 miles east), St Pancras (4 miles north-east), Shoreditch (6 miles east), Walthamstow (10 miles north-east) and Hoxton (6 miles east).
Around Holland Park
Locally, jobs take us to homes and businesses close to Kensington Palace Green, Abdus Salam Library and Windsor Castle in Kensington pub, among other places. Other local landmarks include Kensington School (0.6 miles south-east) and Fox Primary School (under half a mile north-east). The closest station to Holland Park is Kensington Olympia station, roughly 0.5 miles south-west. A little further out are London Museum (0.7 miles east) and St Mary Abbot's Hospital (0.7 miles south-east). Open spaces near Holland Park include Campden Hill and WWT London Wetland Centre.
What the job involves on each surface
Period and listed homes
On a listed home or in a conservation area, the right material matters. Sand mastic is often the preferred finish.
Sash and case windows
A sash window’s box frame sits in the masonry opening. Sand mastic seals the joint round it.
What we can’t put right
To be straight with you, some problems need a different trade:
- Decisions on consent for listed homes
- Damaged stone surrounds
- Sashes that rattle, stick or won’t open
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we will tell you honestly before booking.
Joints and surfaces we work on
- Sash and case windows
- Brick reveals
- Timber door frames
- Period & listed homes
- Tenement windows
- Stone surrounds
Quotes for sand mastic in Holland Park
You will get a clear quote before work begins. It’s based on:
- Whether old sealant or filler has to be cut out
- How many rooms, windows or areas are involved
- Working hours on commercial sites
- How easy the joints are to reach
Doing several joints on one visit normally makes better use of the time than several visits, so it’s worth mentioning everything you’d like done. You will get one clear quote for the whole job.
Helping us quote
What to tell us when you ask for a quote:
- Where the job is, and your postcode
- The type of property
- What the problem is, such as mould, gaps, leaks or cracking
- Pictures of the joints, sent by email
For a quote, ring 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. We will give you a clear quote before any work starts.
Do you need sand mastic in Holland Park?
Sand mastic slowly weathers. It hardens, cracks and starts to come away on the stone or timber.
The problems people normally mention when they call include:
- Open joints round the window box
- Draughts and rain around sash boxes
- Cracked mastic round a front door frame
- Old cement repairs round a window that have failed
As a London address, Holland Park can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Questions to ask before booking
- How much experience the applicator has
- How long the guarantee is
- Whether you can choose the colour
- Whether they seal over old material or remove it