Greater London · England
Sand Mastic in Ruislip
Traditional burnt sand mastic around sash and case windows and doors in stone and brick in Ruislip, with a one-year guarantee on every job. Ask us for a quote.
- Silicone on a period window that looks wrong
- Draughty sash windows at the surround
- Open joints round the window box
Sand mastic in Ruislip, done properly
Sand mastic skins over fairly quickly but full hardening takes longer. Traditionally, sand mastic is left unpainted and we’ll advise if you are redecorating. We work on timber door frames, brick reveals and period & listed homes, and common reasons people get in touch are gaps where the frame meets the masonry and old sand mastic that has cracked, crumbled or fallen out.
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, which is when draughts and damp patches appear in homes in Ruislip.
Each job carries a 12-month guarantee, large or small.
- Where
- Ruislip (HA4, HA5, HA6, UB5)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Frames and glazing around Ruislip
In a converted house or block, who looks after the windows depends on the lease, so it’s worth checking before booking. With historic houses such as Ickenham Hall (about 1.7 miles south-west) nearby, there’s older building stock in the area around Ruislip as well as newer homes. In older buildings, older timber frames in brick or stone need a different approach from a modern uPVC window.
In the older streets around St Lawrence, replacement windows fitted into old openings often leave uneven gaps that need backing and a flexible joint. Ruislip is in London, so parking needs planning: tell us about permits, visitor bays or off-street space when you book.
Ruislip is about 12 miles west of City of Westminster, in Greater London. From the centre of Ruislip to the outskirts, we cover sand mastic for every kind of property, from flats and houses to offices and hotels. 764 places in Greater London are on our list, large and small. There’s also a page for London, roughly 14 miles from Ruislip.
We cover every part of the HA4, HA5, HA6 and UB5 postcode area for sand mastic. That includes homes and businesses on High Street, The Uplands and Hawtrey Drive and the roads around them. Ruislip sits on or near the B466 and B472. Neighbouring places we cover for sand mastic include Ruislip Manor (1 mile south), Ruislip Gardens (1 mile south), Newyears Green (2 miles west), Ickenham (2 miles south-west) and Hillingdon (3 miles south-west). Within a short drive, we also cover London (14 miles east), City of Westminster (12 miles east), Marylebone (12 miles east), Kensington (10 miles south-east), St Pancras (13 miles east) and Shoreditch (15 miles east).
Landmarks near Ruislip
In Ruislip, that means homes and buildings near Heathfield School, Bishop Ramsey School and Church Field Gardens, among other places. Ruislip’s nearest station is West Ruislip station, roughly 1.3 miles west of the centre. Nearby you’ll also find Heath Robinson Museum (1.5 miles north-east) and St. George's Shopping Centre (3 miles east). Not far away are Horse Shoe Bay and Northala Fields.
Aftercare tips
Good habits help new joints last longer. Our tips:
- Ask us before painting near the mastic
- Inspect the joints round the windows every year or so
- Ask the planning authority about consent for listed or conservation-area homes
- Avoid heavy scraping on the mastic joint
When preparing windows for paint, take care around the mastic. It can be damaged by heavy scraping.
Crumbling mastic lets rain into the joint. It can soak into the frame and the surrounding masonry so early renewal protects both.
What happens on the day
When we get to you, we compare the joints with what we discussed. If we find something unexpected, we talk it through with you first. After that, the work takes anything from a few hours to a full day, depending on how many windows. In Ruislip, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First we agree which joints need doing.
- We remove the old, loose mastic.
- We pack any deep voids first.
- The sand mastic is mixed and pressed into the joint by hand.
- We dress the finish so it sits neatly against the masonry.
Before we arrive
- Mention any parking rules near the property
- Tell us about any water getting in
- Let us know about earlier repairs to the joints
Ask for a quote
We do not publish a price list, as no two jobs are quite the same. Instead, your job gets its own clear quote. To get started, call 0345 464 0079 or send us an email.
Related advice
Why deal with it now?
Replacing sash windows is a big decision for a period home, 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 Ruislip, the repair is bigger than the sealant job would have been.
Doing several joints on one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
Why us?
- We leave the area clean and tidy
- We are fully insured
- Domestic, commercial and hotel work
- ARBOMaster approved applicator
Quotes for sand mastic in Ruislip
Jobs vary more than people expect. What affects the quote:
- The size of the job
- Any working-time requirements on site
- Whether there’s mould to deal with
- Access and height
Commercial jobs are quoted on the same basis as homes: the amount of work, how we reach it and what it needs, plus any working-time requirements on site. Call for a quick quote and we’ll go through it with you.
Helping us quote
To make quoting easier, please include:
- A few pictures by email, if you can
- Where the job is, and your postcode
- The rough size of the job
- The problem you’ve noticed
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll talk you through what we’d do. When it suits you, ring 0345 464 0079 or drop us an email.
DIY sealant or a professional job?
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
Overfilling a joint is a classic DIY mistake. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Work for landlords, hotels and businesses
If you manage several properties in or around Ruislip, several properties can be quoted together. Send us the addresses and the work at each.
We regularly work with letting and managing agents. Tell us the address, the job and how access works and we’ll quote.
Places near Ruislip
What else we do in Ruislip
Do you need sand mastic in Ruislip?
Shallow joints are a common cause. Mastic that’s too thin cracks and drops out so we make sure the new mastic is the right thickness.
Signs it’s time to call us include:
- Modern sealant on a period surround
- Open joints round the window box
- Mastic dropping out of the joint
- Draughts and rain around sash boxes
If you let a flat or house near West Ruislip station, any sash windows need sound mastic to keep draughts and rain out.
Before booking anyone
- When the joint can take water or movement
- Whether all the old sealant comes out first
- What guarantee comes with the work
- What insurance they hold
Questions from Ruislip
Can parking be tricky for a visit in Ruislip?
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 work for landlords with property near West Ruislip station?
Yes. We work for landlords and letting agents as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Can I do it myself?
That depends on the joint. High-level, external movement and fire-rated joints are professional jobs, while a short indoor joint may be within reach.
Which products do you use?
Products from Arbo and Everbuild, among others, picked for each joint. We will tell you what we are using and why.
Are you an approved applicator?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Can you quote for more than one area?
Yes. Tell us about everything you’d like done and you will get one quote.
Where is Mr Mastic based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What information do you need?
The location, the problem and the rough size of the job. Photos by email help too.