Greater London · England
External Mastic in Ruislip
External mastic across Ruislip and nearby, with old sealant always removed completely.
- Joints where the bead has come unstuck
- Old sealant gone brittle and cracked
- Failed seals between different materials
External mastic in Ruislip
Ground-floor and low-level joints are straightforward to reach. Where joints are higher up, tell us about the building when you get in touch and we will confirm what’s needed to reach them safely. Common call-outs are for moss and dirt in joints with no sealant left and joints with sealant missing in places, across copings & trims, concrete & block and render & cladding joints.
Outside work in London starts with access: side passages, upper floors and where to park. For a home in Ruislip, tell us how high the joints are and how to reach the back of the building.
Whatever the size of the job, you get the same one-year guarantee in Ruislip and across Greater London.
- Place
- Ruislip (HA4, HA5, HA6, UB5)
- Region
- Greater London
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Page updated
- 26 October 2026
Signs you need external mastic in Ruislip
Poor preparation causes many early failures: joint faces that were dusty or damp, unprimed where they needed it, or still carrying old sealant. The new sealant then lets go long before it should.
Keep an eye out for these signs:
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Joints pointed up with cement by mistake
- Damp patches traced to an open external joint
Schools such as Warrender Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- How long the guarantee is
- Whether you can choose the colour
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
When it isn’t the sealant
In fairness, some problems need a different trade:
- Damp that isn’t coming from the joint
- Movement that’s more than a sealant joint can take
- Cutting new joints into brickwork, which is building work rather than sealant work
Not sure which it is? You can ring 0345 464 0079 or drop us an email and we’ll tell you honestly before you book.
Where we work in Ruislip
- Façade panels
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
- Joints between brick and frames
- Concrete & block
FAQs for Ruislip
Is parking a problem for a job in Ruislip?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. That way the visit can be planned around it.
I let a flat near West Ruislip station. Can you help?
Yes, we work for letting agents and landlords. Just phone 0345 464 0079 or send us an email and tell us about the property, and we will send you a clear quote.
Do the sealants smell?
It depends on the product. Some smell for a while, some hardly at all.
Are you insured?
Yes. We are fully insured.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first.
Which products do you use?
Quality sealants from brands including Arbo and Everbuild, picked for each joint. We explain the product when we quote.
Can you seal joints between two different materials?
Yes. The old joint is removed, both surfaces cleaned and primed where needed, and a flexible sealant applied. We pick a colour that works with both materials.
Do you work for hotels and businesses?
Yes. We’ve worked for hotels, offices and other businesses and we are fully insured.
Places near Ruislip
More services for Ruislip
External mastic in Ruislip: local notes
London and the South East are among the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. 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. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
Homes close to St Lawrence include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move. Rented homes near West Ruislip station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Ruislip is about 12 miles west of City of Westminster, in Greater London. Every kind of property in Ruislip is covered for external mastic, old or new, large or small. Every job comes with our 12-month guarantee. Across Greater London, we cover 764 places, and Ruislip is one of them. Our London page covers work nearby, about 14 miles away.
Postcode districts we cover here for external mastic: HA4, HA5, HA6 and UB5. If you need external mastic at a property on High Street, The Uplands and Hawtrey Drive or a nearby road, our applicators can take on the job. Ruislip is on the B466 and B472, which makes it straightforward to reach with everything needed for external mastic. Nearby, we also carry out external mastic in 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). Larger places within reach include 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
We work in homes and buildings around Heathfield School, Bishop Ramsey School and Church Field Gardens and the streets around them. The nearest railway station is West Ruislip station, about 1.3 miles west of the centre. Well-known places in the area include Heath Robinson Museum (1.5 miles north-east) and St. George's Shopping Centre (3 miles east). Open spaces near Ruislip include Horse Shoe Bay and Northala Fields.
Different surfaces, different methods
Cladding and façade panels
Panels heat up and cool down quickly, so the joint sealant has to cope with frequent movement. We choose the product to suit.
Brickwork movement joints
Brick moves with heat and moisture, and grows a little over time. The movement joint takes that up, so the sealant in it must stay soft and stretchy.
Landlords, agents and businesses in Ruislip
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for.
Mouldy or split sealant often shows up at the end of a tenancy, and it’s easy to sort out between tenants. We can quote for more than one property at once.
Should I try it myself first?
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.
If you do try it yourself, take your time over the 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.
What affects the quote in Ruislip
Jobs vary more than people expect. The main factors:
- The number and length of the joints
- Any working-time requirements on site
- The number of rooms or windows
- Whether there’s mould to deal with
What it costs depends on the amount of work, how much old material has to come out and how easy the joints are to reach. You’ll have a clear quote before any work starts, so you know where you stand.
Helping us quote
What to tell us when you ask for a quote:
- What’s wrong with the joints now
- Photos by email, if that’s easy
- Any access issues, like height or stairs
- Where the job is, and your postcode
Asking for a quote is easy: let us know the job and the location and its rough size. Photos by email help us understand the job, and we’ll take it from there.
What happens on the day
We work through the job in order: protection first, then preparation, sealing and a tidy-up. Typically it takes a few hours for a handful of joints, longer for a whole elevation, and the area is left clean. 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.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
How to prepare
- For business premises, tell us about site rules or sign-in
- Tell us about access, such as stairs, a lift or high-level joints
- Clear items away from the joints we are working on
How to get a quote
We don’t publish a price list. Instead, your job gets its own clear quote. To get started, ring 0345 464 0079 or email us.