Greater London · England
South Ruislip Sand Mastic
Traditional burnt sand mastic around sash and case windows and doors in stone and brick for homeowners, landlords and businesses in South Ruislip. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Old cement repairs round a window that have failed
- Window mastic to renew ahead of painting
- Mastic round period door frames that has failed
What we’re called out for in South Ruislip
Age is the main cause. Even well-laid mastic needs renewing in time, depending on exposure and upkeep.
If you can see any of these, it’s time to have the joints looked at:
- Mastic round period door frames that has failed
- Open joints round the window box
- Wind and rain getting in round a sash window
- Crumbling sand mastic round a window
Managing a site like Deanesfield Primary School? Then the mastic around its windows and doors needs looking after like any other building’s.
What your quote should include
- Which colour the sealant will be
- Whether they’re fully insured
- How hidden problems are handled
- How long to leave it before use
How we handle sand mastic in South Ruislip
For a listed home or one in a conservation area, ask your local planning authority whether consent is needed for work to windows. Like-for-like sand mastic is often the preferred finish. Typical jobs include cracked mastic round a front door frame and mastic that needs renewing before redecorating, on period & listed homes, timber door frames and sash and case windows.
London’s Victorian and Edwardian terraces were built with timber sash windows, and many still have them or their replacements. Whatever is in the opening now, the joint between frame and wall is what keeps the weather out.
All of our work is guaranteed for twelve months.
- Place
- South Ruislip (HA4, UB5, HA2)
- Wider area
- Greater London
- Guarantee
- One year on every job
- Quote
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Places near South Ruislip
Also in South Ruislip
Why act early in South Ruislip
New sash windows are a major, costly change, and in listed buildings it may need consent. Where the frames are in good order, new mastic seals the surround. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and by the time it shows on a wall or ceiling in South Ruislip, the repair is bigger than the sealant job would have been.
A few things move the cost up or down: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. We take all of that into account in your quote.
Why us?
- We never seal over old sealant
- A 12-month guarantee on all work
- Domestic, commercial and hotel work
- Sanitary silicone with an anti-fungal additive in wet areas
When it is not the sealant
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Broken panes
- Decisions on consent for listed homes
- Timber that has rotted
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer.
What we seal
- Sash and case windows
- Stone surrounds
- Timber door frames
- Tenement windows
- Period & listed homes
- Brick reveals
Should I try it myself first?
If you are set on DIY, put the effort into preparation: remove every trace of old sealant, clean and dry the joint, and follow the product’s cure time. If it does not work out, we can still put it right.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Your questions about sand mastic in South Ruislip
I let a flat near South Ruislip station. Can you help?
Yes. We work for landlords and letting agents as well as homeowners, and several properties can go on one quote. You can ring 0345 464 0079 or drop us an email with the details for a clear quote.
Is parking a problem for a job in South Ruislip?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
What guarantee comes with the work?
There’s a 12-month guarantee on every job, sand mastic included.
Can you replace silicone on a period window with sand mastic?
Yes, it’s a common request. All the old silicone is removed first so the mastic beds in well.
Can I add another job to the visit?
Yes, and it often makes sense. Combining jobs makes good use of the visit.
Is it OK to seal over old sealant?
No. New silicone won’t bond to old silicone, and anything trapped underneath, including mould and water, stays there. We remove it all first.
How long does sand mastic take to harden?
It skins over fairly quickly but takes longer to harden fully. We’ll explain what to expect before we leave.
How long does sand mastic take?
That depends on the amount of work, but as a guide it takes a few hours for a single window, longer for several. We’ll tell you when we quote.
What we do, step by step
On the day, there’s very little for you to do. Point us to the joints and we’ll get on with it. The work itself 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.
- We start by checking each surround and agreeing the joints to renew.
- The loose and crumbling mastic is raked out and the joint cleaned.
- Deep voids are packed so the mastic is the right thickness.
- We mix the sand mastic and apply it by hand, shaping it to the joint.
- We dress the surface so it sits neatly against the masonry.
Preparing for the visit
- Mention if the joints have been sealed before
- Let us know if you’ve seen damp or leaks
- Keep children and pets away from the work area
Getting a quote
For sand mastic in South Ruislip, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and we will agree the price before any work begins.
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Work for landlords, hotels and businesses
We work for landlords and letting agents as well as householders. Resealing between tenancies is a simple way to keep a property in good order before the next move-in.
Housing providers, facilities teams and property managers book us too in South Ruislip and across Greater London. We can quote a run of properties together, and we are fully insured for the work.
South Ruislip 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 Northolt Manor (about 1.4 miles south-east) are a reminder that the area around South Ruislip has older buildings as well as new. In older buildings, older frames set in brick or stone need a sealant that suits them, and sometimes that is traditional sand mastic.
For landlords with property near South Ruislip station, cracked sand mastic around sash windows lets in the draughts tenants complain about. Homes close to Church of St Mary include some older properties, and frames set in older brick or stone need a sealant that suits the wall as well as the frame.
South Ruislip is about 1 mile south-east of Ruislip, in Greater London. If you need sand mastic in South Ruislip, please ring 0345 464 0079 or send us an email for a quick quote. We’re based in Crawley and cover Greater London, South Ruislip included. Our Greater London coverage runs to 764 places, South Ruislip among them. London is on our list too, around 13 miles away.
Every address in HA4, UB5 and HA2 is covered for sand mastic. Local streets include Crown Road, Nairn Road and Palace Road, and we cover them all. We also cover the places around South Ruislip: Northolt (1 mile south-east), Roxbourne (1 mile north), Rayners Lane (1 mile north-east), South Harrow (2 miles east) and Eastcote (2 miles north). Within a short drive, we also cover London (13 miles east), City of Westminster (11 miles east), Marylebone (11 miles east), Kensington (9 miles south-east), St Pancras (12 miles east) and Shoreditch (14 miles east).
What’s near South Ruislip
In South Ruislip, that means homes and buildings near Northala Fields, The Black Bull pub and Queensmead School, among other places. There’s a railway station in South Ruislip itself: South Ruislip station. Well-known places in the area include Clementine Churchill Hospital (2.7 miles east) and Heath Robinson Museum (2.4 miles north). Not far away are Middle Lake and Islip Manor Meadows.
Looking after it afterwards
No joint lasts for ever, but care makes a real difference. A few tips:
- Ask a joiner to look at soft timber first
- Take care around the mastic when scraping paint
- Plan mastic work ahead of painting
- Keep sills and gutters clear so water drains away
Keep gutters and sills clear so water runs away from the surround. Water sitting against the mastic shortens its life.
Small cracks are a sign the mastic is ageing. It’s easier to renew it before it drops out.