West Sussex · England
Gossops Green External Mastic
Problem with your movement joints in Gossops Green? We cut out the old, prepare the joints and apply the right sealant, and the work is guaranteed for a year.
- Weathered mastic that no longer stretches
- Water getting into walls through failed joints
- Failed seals between different materials
How we handle external mastic in Gossops Green
Ground-floor and low-level joints are straightforward to reach. For joints higher up, give us some details of the building and we will confirm what’s needed to reach them safely. We work on copings & trims, render & cladding joints and joints between brick and frames, and people most often call us about leaking joints around cladding and façade panels and water getting into walls through failed joints.
In and around Gossops Green, 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.
We guarantee the work for a year. If something is not right with it in that time, tell us and we will put it right.
- Location
- Gossops Green (RH11, RH10)
- Region
- West Sussex
- Cover
- A year, on every job
- Quotes
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
How it works
Most of a good job is in the preparation, and we do not rush it. Joints are cleaned back and dried before anything new goes in. In total, it usually takes anything from a few hours to several days, depending on the building. In a smaller place like Gossops Green, parking is seldom the issue; lanes, gates and long drives are worth mentioning. For outside work, side access and the height of the joints help us plan.
- 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.
- Primer is applied wherever the sealant needs it.
- A low-modulus exterior sealant is gunned in and tooled to a neat finish.
Getting ready for the visit
- Let us know if you’ve seen damp or leaks
- Try not to wet indoor joints just before the visit
- Tell us about any previous sealing or DIY attempts
Get a quote
The more we know about the job, the more useful the quote. Tell us where the job is, what’s wrong and how much there is, and email photos if that is easy.
Related advice
Common questions in Gossops Green
Do you work for landlords with property near Ifield station?
Yes, rental work is part of what we do. You can phone 0345 464 0079 or email us with the address and a few details, and we will give you a fixed price before work begins.
Do you cover smaller places like Gossops Green?
Yes, Gossops Green is covered. We work across London and the South East, from towns to the smallest places. The journey is planned ahead, so it helps to know about access.
Is there any odour?
Possibly a little. Any smell clears as the sealant cures.
Should I point up the gap in my brickwork?
No. A mortar-filled joint cannot move, so the wall cracks somewhere else instead. Use a flexible sealant with backing rod.
Do you work for hotels and businesses?
Yes. Commercial and hotel work is a large part of what we do. We can talk about working times when we quote.
What information do you need?
Only a few details: where it is, what you’ve noticed and how we reach it. After that, simply ring 0345 464 0079 or send us an email.
Do you take out the old sealant first?
Yes. Sealing over the old bead is the commonest cause of early failure, so we never do it.
Will the new joint stand out?
We choose a sealant colour to suit the brick, stone or render, so the joint sits quietly in the wall. Exterior sealants come in a good range of colours.
What happens if it’s left?
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 an older home around Gossops Green, damp from a failed joint can get into timber and plaster, which is far harder to put right than the sealant itself.
Instead of a standard rate, we price the job in front of us: the amount of work, the old material and the access. You will know the price before we begin.
What you get with us
- Domestic, commercial and hotel work
- We never seal over old sealant
- 180+ five-star Google reviews
- Anti-fungal silicone where joints get wet
See what affects the cost or our reviews.
Aftercare tips
Looking after new joints is easy, and it makes a real difference:
- Wash walls gently around the sealant
- Check external joints each spring
- Ask before painting over external sealant
- Keep water from gutters off the wall
Look over the joints once a year, ideally after winter. Watch for splits, edges coming away or growth in the joint.
Water getting behind cladding or render can go unnoticed for a long time. When it finally shows inside, the joint may have been open for years, so it’s worth resealing at the first signs.
Landlord and commercial work in Gossops Green
Landlords and agents in Gossops Green can book us as well as householders. Sealant work between tenants is a simple way to keep a property in good order before the next move-in.
Failed sealant is one of the commonest items on a check-out report, and it’s quick to put right between tenancies. We can quote for more than one property at once.
Outside joints around Gossops Green
Compared with the north and west, the South East gets less rain, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. Gossops Green is part of Crawley, one of the post-war new towns. Homes here were built in phases, many of them in the post-war decades, so neighbouring houses often have rooflines and wall joints of the same age, wearing out at the same time.
Schools such as Ifield Community College are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Homes close to St Peter's include some older properties, and the joints between older walls, newer extensions and the roofline need a sealant that can move.
Gossops Green is about 1 mile west of Crawley, in West Sussex. Gossops Green gets the same service as everywhere we cover: the old material taken out, joints prepared properly and a 12-month guarantee. Across West Sussex, we cover 371 places, and Gossops Green is one of them.
Postcode districts we cover here for external mastic: RH11 and RH10. You’ll find streets such as Oak Road, Capel Lane and Goffs Lane, and we cover them all. Being close to the A23, Gossops Green is simple for us to get to for external mastic. We also cover Ifield (1 mile north), Bewbush (1 mile south-west), Ifieldwood (2 miles north-west), Lambs Green (2 miles west) and Russ Hill (3 miles north-west). Within a short drive, we also cover Horsham (6 miles south-west), Haywards Heath (9 miles south-east), Burgess Hill (11 miles south), East Grinstead (9 miles east), Billingshurst (12 miles south-west) and Roffey (5 miles south-west).
What’s near Gossops Green
Locally, jobs take us to homes and businesses close to Target Hill Park, The Swan pub and St Wilfrid's Catholic School. Gossops Green has its own railway station: Ifield station. Other landmarks nearby include County Mall (0.9 miles east) and Crawley Hospital (less than half a mile north-east). Not far away are Tilgate Lake.
Also near Gossops Green
What else we do in Gossops Green
Quotes for external mastic in Gossops Green
Your quote is based on your job. We look at:
- Which sealant suits the joint
- Mould in or behind the old joints
- How many rooms, windows or areas are involved
- Access and height
A failed joint rarely gets cheaper to fix by waiting, as water and mould keep getting in. If you’re not sure whether it needs doing, ring 0345 464 0079 or send us an email for an honest opinion and a quote.
Asking for a quote
What to tell us when you ask for a quote:
- What the problem is, such as mould, gaps, leaks or cracking
- Whether it’s a home or a business
- Roughly how big the job is
- If someone has resealed it before
There’s no standard price list. Instead, we give you a clear price for your job. To get started, phone 0345 464 0079 or email us.
What the job involves on each surface
Concrete and blockwork
Concrete faces can be dusty and porous, so cleaning and priming matter. A primer goes on where the product requires one before the bead.
Copings and trims
Copings expand and contract through the day, so a flexible sealant suits them best in all weathers.
Common problems we fix in Gossops Green
Using the wrong sealant is another common reason. A stiff, general-purpose sealant cannot cope with a joint that moves a lot, so it pulls away from the edges.
Any of these means the joints need attention:
- Weathered mastic that no longer stretches
- Cracked joints where brick meets render or frames
- Brick movement joints where the sealant has split
- Rigid filler in a joint that should flex
Rented homes near Ifield station change hands often, and outside joints that have cracked can let damp into a rental, so check them between lets.
Questions to ask before you book
- How the joint is cleaned and prepared
- What happens if they find a problem under the old sealant
- Is the old sealant removed completely?
- How long the guarantee is