West Sussex · England
External Mastic in Broomer's Corner
Professional external mastic in and around Broomer's Corner, with every bit of old sealant taken out first and a 12-month guarantee.
- Joints pointed up with cement by mistake
- Panel joints letting water in
- Failed seals between different materials
When it isn’t the sealant
Sealant isn’t the answer to every problem, and we will tell you before we start. It won’t solve:
- Loose or hollow render, which needs re-rendering
- Adding movement joints to masonry that has none
- Damp from another source, such as a leaking gutter or a bridged damp-proof course
Not sure which it is? You can ring 0345 464 0079 or email us and we’ll tell you honestly before you book.
Where we work in Broomer's Corner
- Brickwork movement joints
- Concrete & block
- Render & cladding joints
- Joints between brick and frames
- Copings & trims
- Façade panels
External mastic in Broomer's Corner
Failed sealant is cut out, the depth set with closed-cell backing rod, and the joint resealed with a low-modulus sealant made for outside. The colour is chosen to suit the brick or render so the joint doesn’t stand out. If you have rain getting behind render or cladding at a joint and joints where the bead has come unstuck, we can put it right.
Outside joints can only be sealed when they’re dry, so work in Broomer's Corner is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
You get a 12-month guarantee, the same in Broomer's Corner as everywhere else we work.
- Where
- Broomer's Corner (RH13)
- Region
- West Sussex
- Cover
- 12 months on all our work
- Quotes
- A clear quote up front
- Call
- 0345 464 0079
- Last updated
- 26 October 2026
Nearby places to Broomer's Corner
More services for Broomer's Corner
What we are called out for in Broomer's Corner
Sometimes a movement joint was filled with mortar or a rigid filler, often by someone who didn’t know what it was for. With the joint locked solid, the movement turns into cracks elsewhere in the wall.
The most common problems we see are:
- Joints where the bead has come unstuck
- Water getting into walls through failed joints
- Cracked joints where brick meets render or frames
- Panel joints letting water in
If you let a flat or house near Billingshurst station, outside joints that have cracked can let damp into a rental, so check them between lets.
What your quote should include
- Who does the work, and how experienced they are
- What the quote includes, VAT included or not
- What the cure time is
- What happens if they find a problem under the old sealant
Broomer's Corner: your questions answered
Will you come out to Broomer's Corner?
Yes, we do. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you help a landlord with a rental near Billingshurst station?
Yes, we work for letting agents and landlords. Just ring 0345 464 0079 or send us an email and tell us about the property, and we will give you a clear price.
Will you leave a mess?
We keep the work tidy. Nearby surfaces are protected, and we clear up when we’re done.
How long does the job 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, and we’ll tell you how long to expect.
Do I need to be at home?
For indoor joints, yes, someone needs to let us in. After that, you can carry on with your day.
Where are you based?
We’re based in Crawley, West Sussex, and we work across South East England, London and Scotland.
What do you put in the joint?
We choose the sealant for the joint, not the other way round. Where it moves, gets wet or faces the weather makes a difference, and we’ll explain our choice.
Can you seal joints between render and window frames?
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.
The process
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 we leave things clean and tidy. In a small place like Broomer's Corner, access is usually the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- We look at every joint and agree a colour to suit the wall.
- We take out the old sealant until the faces are sound.
- 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
- Tell us if parking is tricky
- On commercial sites, let us know about site rules
- Clear items away from the joints we’re working on
Getting a quote
Every job is quoted individually. Just phone 0345 464 0079 or send us an email with the details.
Advice
Outside joints around Broomer's Corner
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
For site and facilities teams at buildings such as William Penn School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s. Homes close to St Mary's Mission Church include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Broomer's Corner is about 7 miles south-west of Horsham, in West Sussex. Jobs in Broomer's Corner get the same care as everywhere else we work: the old material taken out, joints prepared properly and a 12-month guarantee. Our area takes in 371 places across West Sussex, from the larger towns to small villages. There’s also a page for Crawley, about 13 miles away.
Postcode districts we cover here for external mastic: RH13. Local streets include Saucelands Lane, Sincox Lane and Hooklands Lane. Other places close to Broomer's Corner include Whitehall (1 mile east), Shipley (1 mile north-east), Dragons Green (2 miles north-east), Dial Post (2 miles south-east) and Ashington (3 miles south). Within a short drive, we also cover Crawley (13 miles north-east), Horsham (7 miles north-east), Worthing (11 miles south), Haywards Heath (13 miles east), Burgess Hill (12 miles east) and Littlehampton (13 miles south-west).
Near you in Broomer's Corner
For rail, the closest station is Billingshurst station, about 3.4 miles north-west of the centre. Green spaces nearby include Knepp Wildland.
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
Too much sealant is as bad as too little. A heavy bead looks messy and copes badly with movement, and the joint depth matters as much as the finish.
Looking after it afterwards
Aftercare is simple, and it makes a real difference:
- Keep high-pressure jets off the joints
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
- Never let anyone fill a movement joint with mortar
If you have more work done on the wall, such as new render, cladding or an opening, show the contractor the movement joints. They should be kept open and resealed, not filled.
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, all bigger jobs than a reseal.
What happens if it’s left?
Resealing a run of joints in one go is usually better than patching one at a time. They’ve weathered the same way. In a small place like Broomer's Corner, homes can be exposed to wind and rain, which finds any gap, and older walls, once damp, take a long time to dry.
Doing several joints on one visit usually makes better use of the time than several visits. We’ll give you a clear quote for the lot.
Why choose Mr Mastic in Broomer's Corner
- Fully insured
- Over 20 years’ experience
- Colour picked to suit the job
- Anti-fungal sanitary silicone in wet areas
Take a look at what affects the cost and customer reviews.
What the job involves on each surface
Render joints
The face of render can be soft, so a low-modulus sealant is kinder to the joint edges. We prime where the product needs it.
Joints between dissimilar materials
Where a frame or panel meets masonry, water often finds a way in. We cut out the old sealant and reseal with a product suited to both surfaces.