Greater London · England
Ruislip Gardens External Mastic
We cover Ruislip Gardens for sealing brickwork movement joints, render, cladding and façade joints. Old sealant removed completely, joints prepared properly.
- Panel joints letting water in
- Plants rooting in failed movement joints
- Sealant that has lost its bond to the brick or render
External mastic in Ruislip Gardens
For buildings in Ruislip Gardens, we reseal external joints of all kinds, from brick movement joints to cladding panels. Every joint gets the same careful preparation: clean, sound faces and a controlled depth. If you have rain getting behind render or cladding at a joint and movement joints with cracked, split or missing sealant, we can help, on copings & trims, render & cladding joints and concrete & block alike.
Modern London flats rely on sealed movement joints and cladding joints. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall, and both kinds of building are found across London.
All of our work is guaranteed for twelve months, in Ruislip Gardens and everywhere else we cover.
- Place
- Ruislip Gardens (HA4)
- Wider area
- Greater London
- Cover
- 12 months on all our work
- Quote
- A clear price before work begins
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Ruislip Gardens
I let a flat near South Ruislip station. Can you help?
Yes, we work for letting agents and landlords. You can call 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is Ruislip Gardens in your area for external mastic?
Yes. We work across London and the South East, and Ruislip Gardens is part of that. You can call 0345 464 0079 or email us and let us know what needs doing, and we will give you a clear price.
How long does external mastic take?
Typically it takes a few hours to a few days, depending on the length of joint and the access. Larger jobs naturally take longer.
Is it OK to seal over old sealant?
No, because it fails. The old sealant always comes out first, so the new joint bonds to clean surfaces.
What do you put in the joint?
Each joint gets the product that suits it. Where it moves, gets wet or faces the weather makes a difference, and we will tell you what we’re using.
How much does external mastic cost in Ruislip Gardens?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before work begins.
When will the joints need doing again?
It varies from wall to wall: joints on exposed walls or with a lot of movement age sooner. Check them each year and reseal when they split or harden. Our work comes with a one-year guarantee.
Where are you based?
Mr Mastic is based in Crawley. Our applicators cover Ruislip Gardens, along with the rest of our area.
Different surfaces, different methods
Render joints
Render is weaker at the surface than brick, so a sealant that stretches easily protects the edges. Priming is done where the sealant calls for it.
Joints between dissimilar materials
Brick against render, concrete against metal, stone against timber: every change of material is a joint. We seal the joint with a flexible exterior sealant.
Can I do it myself?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and getting the depth right matters as much as the look.
Towns and villages near Ruislip Gardens
Other services in Ruislip Gardens
What we do, step by step
On the day, we look over the joints with you first. We protect the surfaces around the joints before we start. Most jobs take a few hours to a few days, depending on the length of joint and the access. In Ruislip Gardens, flats, stairs and shared entrances are part of the routine. If the building has a concierge, managing agent or access rules, tell us when you book.
- Each joint is checked and the colour of the new sealant agreed.
- Failed sealant is removed back to clean, sound faces.
- Closed-cell backing rod is pushed in so the sealant bonds to two sides only.
- We prime the faces where required.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any parking rules near the property
- Mention any sign-in or site rules at work premises
Getting a quote
For a quick quote, get us on the phone, or send an email if you’d rather. Tell us about the joints that need doing and we will explain what’s involved.
Related advice
When to call us in Ruislip Gardens
The wrong product in a moving joint is a classic cause. A stiff, general-purpose sealant can’t cope with a joint that moves a lot, so it pulls away from the edges.
Any of these means the joints need attention:
- Rain getting behind render or cladding at a joint
- Panel joints letting water in
- Old sealant gone brittle and cracked
- Joints with sealant missing in places
Schools such as Ruislip High School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing.
Questions to ask before you book
- What the cure time is
- How the joint is cleaned and prepared
- What the quote includes, VAT included or not
- Whether the sealant suits the joint
For landlords and businesses
Whether it’s one flat or a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
We also work for businesses, from offices to washrooms and kitchens. On commercial sites, working times can be discussed when we quote.
Ruislip Gardens buildings and the weather
Compared with the north and west, the South East gets less rain, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
For landlords with property near South Ruislip station, failed wall and movement joints let damp in, so they’re worth checking between tenancies. Ruislip Gardens is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Ruislip Gardens is about 1 mile south of Ruislip, in Greater London. From the centre of Ruislip Gardens to the outskirts, we cover external mastic for every kind of property. Ruislip Gardens is one of 764 places in Greater London we cover for external mastic. Our London page covers work nearby.
Work in HA4 works the same way as everywhere else we cover. Whether your property is on Bedford Road, Tiptree Road and Hardy Avenue or anywhere close by, we can help. If you’re just outside Ruislip Gardens, we cover Ruislip Manor (1 mile north), Ruislip (1 mile north), Ickenham (2 miles west), Hillingdon (2 miles south-west) and Newyears Green (3 miles north-west). We also work in nearby towns such as 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 (14 miles east).
Local landmarks in Ruislip Gardens
Around Ruislip Gardens, our work takes us to homes and buildings near The Arth pub, Church Field Gardens and Ruislip Gardens Primary School, among other places. For rail, the closest station is South Ruislip station, roughly 0.5 miles south-east. Well-known places in the area include Hayes Cottage Hospital (2.7 miles south) and The Chimes (3 miles west). For a walk, there’s Northala Fields and Horse Shoe Bay.
When something else is needed
Honest advice matters more to us than a booking, so here’s what new sealant won’t do:
- Render that is blown, hollow or coming away
- Subsidence or other structural problems
- Damp that is not coming from the joint
If in doubt, phone 0345 464 0079 or send us an email and we will say what we think before booking.
What we seal
- Façade panels
- Concrete & block
- Joints between brick and frames
- Render & cladding joints
- Copings & trims
- Brickwork movement joints
Keeping the joints in good condition
So the new joints stay in good condition:
- Show decorators and builders where the movement joints are
- Wash walls gently around the sealant
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
Give the sealant the cure time we tell you before anything rubs against it. The surface skins over quickly, but full cure takes longer.
An open movement joint lets rain into the wall every time it pours. Over time it can mean damp inside, stained render or frost-damaged brick which cost more to put right than the joint.