Greater London · England
Hooley External Mastic
Specialist external mastic for Hooley: the right sealant, proper preparation and a neat finish. Call for a quick quote.
- Movement joints with cracked, split or missing sealant
- Failed sealant between panels on a façade
- Movement joints filled with mortar instead of sealant
External mastic for homes and businesses in Hooley
Movement joints let brickwork, render and cladding expand and shrink without cracking. Its sealant has to flex with the building, season after season, so once it splits or hardens, the joint stops working and water gets in. Typical jobs include leaking joints around cladding and façade panels and sealant that has lost its bond to the brick or render, on copings & trims, concrete & block and render & cladding joints.
Working on the outside of a London home means planning access: shared paths, upper floors and parking. For a home in Hooley, tell us how high the joints are and how to reach the back of the building.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we’ll sort it.
- Location
- Hooley (CR5, RH1)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Get split or bare joints resealed while the damage is small
- Keep water from gutters off the wall
- Never let anyone fill a movement joint with mortar
- Show decorators and builders where the movement joints are
Keep the joints clear of soil, plants and climbing growth. Anything that holds water against the joint wears it out sooner.
Small splits are the time to act. Then it’s a straightforward cut-out and reseal.
How it works
At the end, we look at the finished work together and explain the cure time. The visit itself generally takes a few hours for a handful of joints, longer for a whole elevation, depending on the amount of work. In Hooley, 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.
- Backing rod goes in so the sealant can stretch between the two faces.
- We prime the faces where required.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Before we arrive
- Move anything stored near the joints
- Mention if the joints have been sealed before
- Where the joints are inside, avoid wetting them before we arrive
Getting a quote
For a quote, phone 0345 464 0079 or email us with the location and a short description of the problem. We will give you a clear price before any work starts.
Related advice
Places near Hooley
Other services in Hooley
Leave it or put it right?
Done well, a resealed joint is a neat, straight line that suits the wall. A rushed bead with no backing looks untidy and does not last. In a London flat, a failed joint rarely stays your problem alone: water from a shower or window joint can reach the flat below, and gaps in fire-stopping matter to everyone in the building.
No two jobs are quite the same, so each one gets its own quote. The number of joints, how easy they are to reach and the sealant needed all play a part.
Why choose Mr Mastic in Hooley
- A sealant colour to suit the surroundings
- Sanitary silicone with an anti-fungal additive in wet areas
- Every job guaranteed for a year
- An ARBOMaster approved applicator
Read how sealant jobs are priced and customer reviews.
How the job changes by surface
Concrete and blockwork
Concrete and block walls shrink as they dry and move with temperature. Their movement joints are sealed over backing rod with a flexible sealant.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
Outside joints around Hooley
In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking. Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
As a London address, Hooley can be tricky for parking: tell us about permits, visitor bays or off-street space when you book. Letting a property close to Chipstead station? Then outside joints that have cracked can let damp into a rental, so check them between lets. If you look after a building such as Coulsdon Sixth Form College, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Hooley is about 2 miles south-west of Coulsdon, in Greater London. Hooley gets the same service as everywhere we cover: old sealant removed completely, careful preparation and a 12-month guarantee. Hooley is one of 764 towns and villages in Greater London where we work. Crawley is on our list too, around 13 miles away.
We cover every part of CR5 and RH1 for external mastic. Local streets include Church Lane Avenue, Church Lane Drive and Brighton Road, all of which we cover. Neighbouring places we cover for external mastic include Netherne on-the-Hill (1 mile east), Merstham (2 miles south), Mugswell (2 miles south-west), Gatton (2 miles south) and South Merstham (2 miles south). We also work in nearby towns such as London (15 miles north), City of Westminster (15 miles north), Kensington (15 miles north), Brompton (14 miles north), Stockwell (12 miles north) and Orpington (13 miles north-east).
Around Hooley
In Hooley, that means homes and buildings near The White Hart pub and Shabden Park. For rail, the closest station is Chipstead station, roughly 1.4 miles north-west of the centre. Well-known places in the area include East Surrey Museum (3.4 miles east) and St Lawrence's Hospital (2.5 miles east). Green spaces nearby include Colley Hill and South London Downs National Nature Reserve.
DIY versus a professional finish
The biggest DIY mistake is sealing over old sealant. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is matched to the joint and its conditions, then guaranteed for a year.
Questions from Hooley
Can you help a landlord with a rental near Chipstead station?
Yes, rental work is part of what we do. You can call 0345 464 0079 or send us an email with the address and a few details, and we will give you a fixed price before any work starts.
Is parking a problem for a job in Hooley?
In much of London, parking needs planning: a visitor permit or a bay close to the door helps a lot.
Will the old sealant be removed?
Always. Sealing over old sealant is the main reason resealing fails early, and it’s something we never do.
Is the work guaranteed?
Yes: twelve months. If there’s a problem with our work in that time, tell us and we will put it right.
Will you leave a mess?
Very little: the area around the joints is protected first, and we clear up the old sealant and our materials before we leave.
How do I get a quote for external mastic in Hooley?
There’s no set price, as it depends on the job: its size, the old material, access and the product needed. We agree the price before any work begins.
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 are using.
Can you work on commercial sites?
Yes. Hotels, offices and other businesses use us, and we are fully insured.
Honest limits
In fairness, some problems need a different trade:
- Cracks in the bricks or render themselves, away from the joints
- Loose or hollow render, which needs re-rendering
- Damp that is not coming from the joint
If you’re not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer.
Surfaces we seal
- Render & cladding joints
- Joints between brick and frames
- Brickwork movement joints
- Copings & trims
- Concrete & block
- Façade panels
What affects the quote in Hooley
The price is agreed before any work begins. It’s based on:
- The old material and how stubborn it is
- The size of the job
- Mould in or behind the old joints
- Working hours on commercial sites
Homes and businesses are quoted the same way: 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 will go through it with you.
Helping us quote
Photos by email are helpful but not essential. Please mention:
- Pictures of the joints, sent by email
- The type of property
- What’s wrong with the joints now
- The rough size of the job
Want a quote for external mastic? Please ring 0345 464 0079 or email us with a few details. You will know what we plan to do, and what it will cost, before any work begins.