West Sussex · England
Copthorne Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for householders, landlords and businesses in Copthorne. Fully insured, ARBOMaster approved and guaranteed for a year.
- Open joints in fascias and soffits
- Failed sealant on a garage door frame
- Stop ends leaking at the end of a run
Gutter sealing in Copthorne
We do not replace gutters, fascias or roofs. What sealant does is close joints and it cannot mend broken brackets, split sections or blocked downpipes. We work on gutter end caps, garage door frames and gutter joints, and people most often call us about internal damp traced to a gutter joint and water dripping where gutter sections meet.
Outbuildings, garages and conservatories around homes in places like Copthorne add more joints to look after. Gutter ends, garage door frames and the joints where an extension meets the house are typical spots for leaks.
We guarantee the work for a year. If there’s a problem with our work within the year, let us know and we will sort it.
- Location
- Copthorne (RH10, RH6)
- Wider area
- West Sussex
- Guarantee
- A year, on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Updated
- 26 October 2026
Outside joints around Copthorne
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. Historic houses like Gravetye Manor (about 4.5 miles south-east) are a reminder that the area around Copthorne has older buildings as well as new. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material.
If you let a flat or house near Gatwick Airport station, a gutter joint that drips onto the wall can turn into a damp complaint, so it’s worth checking. Managing a site like Fairway Infant School? Then its movement joints, gutters and trims need looking after like any other building’s.
Copthorne is about 3 miles north-east of Crawley, in West Sussex. For gutter sealing in and around Copthorne, please call 0345 464 0079 or drop us an email for a quick quote. We are based in Crawley and cover West Sussex. Copthorne is one of 371 towns and villages in West Sussex we cover.
Every address in RH10 and RH6 is covered for gutter sealing, from the main roads to the quietest streets. Streets in the area include Church Road, Brookside and Bridgelands. Copthorne is on the A264, which makes it straightforward to reach with everything needed for gutter sealing. If you are just outside Copthorne, we cover Shipley Bridge (1 mile north-west), Forge Wood (1 mile west), Tinsley Green (1 mile west), Burstow (1 mile north) and Keeper's Corner (1 mile north-east). Further out, we also cover Crawley (3 miles south-west), Horsham (10 miles south-west), Haywards Heath (10 miles south), Burgess Hill (12 miles south), East Grinstead (5 miles east) and Broadfield (4 miles south-west).
Local landmarks in Copthorne
Locally, jobs take us to homes and businesses close to Worth Park Gardens, The Cherry Tree pub and Hazelwick School and the streets around them. The nearest railway station is Gatwick Airport station, roughly 2 miles north-west. Nearby you’ll also find Effingham Park Motor Museum (1.6 miles east) and County Mall (3 miles south-west). Not far away are Hedgecourt Lake.
What affects the quote in Copthorne
Your quote is based on your job. We take into account:
- The amount of work
- Mould in or behind the old joints
- How many areas need sealing
- How easy the joints are to reach
Doing several joints on one visit is normally more efficient than separate visits, so it’s worth mentioning everything you’d like done. We will give you a clear price for the lot.
What we need to know
You do not need to know the technical terms. It helps if you can tell us:
- How many joints, rooms or windows are involved
- Whether it has been sealed before
- Photos by email, if that’s easy
- How we’d reach the joints
Quotes start with a quick conversation. Tell us what’s wrong, where it is and how much there is. Whenever you are ready, ring 0345 464 0079 or send us an email.
When to call us in Copthorne
Gutter joints rely on seals that age. Temperature changes make gutters move, and old seals crack or slip.
It’s worth asking for a quote if you see:
- Damp on an inside wall under a dripping gutter
- Drips from gutter joints and end caps
- Trim joints where the sealant has failed
- Old gutter sealant that has let go
Homes close to St John's Church include some older properties, and older walls, gutters and the joints where extensions meet them need a flexible sealant.
What your quote should include
- How the colour is chosen
- When the joint can take water or movement
- What guarantee comes with the work
- How hidden problems are handled
DIY sealant or a professional job?
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas call for the right materials, safe access and experience.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it peels away and traps moisture behind it. All the old material has to come out first.
Questions from Copthorne
Can you do gutter sealing in Copthorne?
Yes. Our work covers London and the South East, and Copthorne is part of that. You can ring 0345 464 0079 or drop us an email and let us know what needs doing, and we will give you a clear price.
Will you come out to Copthorne?
Yes, Copthorne is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
How long does the job take?
Typically it takes an hour or two for a few joints, longer for a full run. Larger jobs naturally take longer.
Is the work guaranteed?
All our work carries a one-year guarantee.
Are you fully insured?
Yes. Full insurance covers our work.
Where do you work from?
Mr Mastic is based in Crawley. We cover Copthorne and the rest of West Sussex.
Can you match the sealant colour?
We help you choose a colour that suits. The choice depends on the product the joint needs.
Will you clear out my gutters?
We clear what’s around the joints we work on. Full gutter cleaning is a separate job.
Work for landlords, hotels and businesses
Housing providers, facilities teams and property managers book us too. Several sites can go on one quote, and we’re fully insured for the work.
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
How it works
Our applicators work methodically: protect, prepare, seal, tidy. For most jobs that takes a few hours, depending on the number of joints and the access, and the area is left clean. A visit to Copthorne is planned like any other: the time, the access and where to park are agreed in advance. If the work is outside, the weather plays a part, as sealant needs a dry surface.
- We find where the water is coming from and check the gutter is sound.
- The old sealant and dirt are cleaned out of the joint.
- The joint is dried before sealing.
- We seal the joint with a sealant made for gutters.
- We check the run and clear debris near the joints.
Getting ready for the visit
- Let us know about earlier repairs to the joints
- For indoor joints, keep the area dry beforehand if you can
- Clear items away from the joints we’re working on
Getting a quote
If you are in Copthorne and need gutter sealing, call 0345 464 0079 or email us. A short description of the job and where it is helps us quote, and you’ll get a clear quote before we start.
Read more
Nearby places to Copthorne
Other services in Copthorne
When something else is needed
We’d rather tell you now than do work that will not last, so here’s what sealant cannot put right:
- Rotten or damaged fascia boards
- Sagging gutters or broken brackets
- Downpipes that are blocked or broken
If you’re not sure, just call 0345 464 0079 or email us and we’ll give you a straight answer before you book.
What we seal
- Garage door frames
- Roofline trims
- Soffit joints
- Gutter joints
- uPVC fascias
- Gutter end caps
Aftercare tips
Good habits help new joints last longer. Our tips:
- Deal with a drip before winter
- Keep downpipes clear
- Glance at the soffit joints now and then
- Do not leave a sagging gutter
If a gutter starts to sag, get the brackets looked at. If it drops, the joints will open.
Rain getting in round a garage door frame can damage what’s stored inside. A reseal sorts it while the frame is sound.