West Sussex · England
External & façade joints in Forge Wood, West Sussex
Professional external mastic in and around Forge Wood, with every bit of old sealant taken out first and a one-year guarantee.
- Moss and dirt in joints with no sealant left
- Brick movement joints where the sealant has split
- Old sealant gone brittle and cracked
Can I do it myself?
Overfilling a joint is a classic DIY mistake. A thick, smeared bead looks untidy and doesn’t move well, and the joint depth matters as much as the finish.
Some sealant jobs are within reach of a careful DIYer, like a short, easy-to-reach joint indoors. Where it goes wrong is sealing over the old bead, working on a wet joint or overloading the gap.
External mastic in Forge Wood, done properly
We cut out failed sealant, set the joint depth with closed-cell backing rod and reseal with a low-modulus exterior sealant. The colour is chosen to suit the brick or render so the joint doesn’t stand out. If you have plants rooting in failed movement joints and brick movement joints where the sealant has split, we can put it right, whatever the surface.
In and around Forge Wood, older properties sit alongside newer ones, each with its own outside joints. Older homes need their gutter and trim joints kept tight, newer ones their movement joints.
A 12-month guarantee comes with the work, just as it does everywhere we cover.
- Place
- Forge Wood (RH10, RH6)
- Wider area
- West Sussex
- Cover
- One year on every job
- Quotes
- A clear price before work begins
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
FAQs for Forge Wood
Is Forge Wood in your area for external mastic?
Yes. We work across London and the South East, and Forge Wood is part of that. Just call 0345 464 0079 or drop us an email with a few details of the job, and we will give you a clear price.
Can you help a landlord with a rental near Three Bridges station?
Yes, we work for landlords and letting agents. You can ring 0345 464 0079 or drop us an email with the address and a few details, and we will give you a fixed price before work begins.
What should I tell you?
Only a few details: the address or postcode, what’s wrong and any access issues. After that, simply phone 0345 464 0079 or email us.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Can new sealant go over the old?
No, it won’t last. It can look neat for a few weeks, but the new bead soon lifts. The old sealant has to come out completely.
Do you take out the old sealant first?
Yes. We cut out all the old sealant and clean the joint before applying anything new.
What is backing rod for?
We fit closed-cell backing rod wherever the joint depth needs controlling. It sets the sealant depth and prevents three-sided bonding.
Why is there a gap in my brick wall?
Brickwork, render and cladding all move a little, and planned joints take up that movement. It’s closed with backing rod and a flexible sealant.
Landlords, agents and businesses in Forge Wood
We work for letting agents and landlords as well as homeowners. Sealant work between tenants is a simple way to keep a property in good order.
For anyone letting property in or around Forge Wood, several properties can go on one quote. Just tell us the addresses and what each one needs, and pictures by email help.
Outside joints around Forge Wood
Compared with the north and west, the South East gets less rain, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
Letting a property close to Three Bridges station? Then failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Forge Wood is about 2 miles north-east of Crawley, in West Sussex. Our applicators cover external mastic for homeowners, landlords and businesses in Forge Wood, as part of our work across West Sussex. We cover 371 towns and villages across West Sussex, from the larger towns to small villages.
All of RH10 and RH6 is within our area for external mastic, from the main roads to the quietest streets. External mastic is available to properties on Moore Road, Steers Lane and Radford Road and the roads around them. Nearby, we also carry out external mastic in Tinsley Green (1 mile north), Pound Hill (1 mile south), Shipley Bridge (1 mile north-east), Copthorne (1 mile east) and Three Bridges (1 mile south). We also work in nearby towns such as Horsham (9 miles south-west), Haywards Heath (10 miles south), Burgess Hill (12 miles south), East Grinstead (6 miles east), Broadfield (4 miles south-west) and Billingshurst (15 miles south-west).
Landmarks near Forge Wood
Locally, jobs take us to homes and businesses close to Worth Park Gardens, The Greyhound pub and The Gatwick School and the streets around them. Forge Wood’s nearest station is Three Bridges station, about 1.4 miles south. A little further out are Crawley Museum (2.1 miles south-west) and Langley Green Hospital (1.7 miles west). Green spaces nearby include Tilgate Lake.
The process
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes a few hours for a handful of joints, longer for a whole elevation, depending on how much there is to do. In a smaller place like Forge Wood, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We look at every joint and agree a colour to suit the wall.
- 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.
- We gun in low-modulus sealant and tool it neatly.
How to prepare
- On commercial sites, let us know about site rules
- Try not to wet indoor joints just before the visit
- Let us know about earlier repairs to the joints
Ask for a quote
Want a quote for external mastic? Please call 0345 464 0079 or drop us an email with a few details. You’ll know what we plan to do, and what it will cost, before any work begins.
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What sealant work can’t fix
In fairness, some problems need a different trade:
- Loose or hollow render, which needs re-rendering
- Cracking across the wall rather than at a joint
- Walls that need new movement joints cut into them
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before booking.
What we seal
- Façade panels
- Copings & trims
- Render & cladding joints
- Brickwork movement joints
- Concrete & block
- Joints between brick and frames
Also near Forge Wood
Also in Forge Wood
How the job changes by surface
Brickwork movement joints
Brick movement joints are often mistaken for a missing mortar line. If that’s happened, we rake it out and reseal it properly.
Render joints
Rendered walls have joints at beads, openings and changes of material. They’re resealed in a sealant that suits the render.
Signs you need external mastic in Forge Wood
Every building moves. Brickwork grows a little over the years, blockwork and concrete shrink, and all of it moves with heat and moisture. The sealant in the movement joints takes that strain.
The most common problems we see are:
- Joints where the bead has come unstuck
- Gaps where render, brick and frames meet
- Rain getting behind render or cladding at a joint
- Movement joints filled with mortar instead of sealant
Managing a site like Forge Wood Primary School? Then larger buildings have long runs of movement joint that eventually need resealing.
What your quote should include
- Whether they seal over old material or remove it
- Whether they’re fully insured
- How the colour is chosen
- How much experience the applicator has
Why deal with it now?
The longer a joint stays open, the more water the wall takes in. In cold weather, frost can damage wet brick and render around the joint, so the problem grows beyond the joint itself. Around Forge Wood, water from a failed joint in an older home can soak into timber and plaster, which is far harder to put right than the sealant itself.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, whether mould needs treating, and whether the work is at height. Your quote takes all of that into account.
Why Forge Wood clients choose us
- Domestic, commercial and hotel work
- Colour picked to suit the job
- An ARBOMaster approved applicator
- You choose the colour before work begins
See our cost guide or what customers say.