West Sussex · England
Gutter Sealing in Colwood
Gutter sealing for Colwood, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Failed sealant on a garage door frame
- Earlier gutter repairs that have peeled off
- Fascia boards with gaps between them
Common problems we fix in Colwood
Water spilling over a blocked gutter is often mistaken for a leak. A blocked downpipe makes water back up so we check the cause first.
The problems people usually mention when they call are:
- Trim joints where the sealant has failed
- Garage door frames letting rain in
- Water running down the wall below the gutter
- Earlier gutter repairs that have peeled off
Historic houses such as Tyes Place, about 3.4 miles north-east, show how far back building around Colwood goes, and older homes nearby need a sealant that suits their walls.
Comparing quotes
- What the cure time is
- How hidden problems are handled
- Whether they seal over old material or remove it
- The length of the guarantee
Gutter sealing for homes and businesses in Colwood
Open fascia and soffit joints spoil the roofline and can let weather in. They’re sealed in a matching colour where possible. If you have quick sealant fixes on gutters that didn’t last and old sealant on roofline trims that has split, we can put it right, on garage door frames, roofline trims and soffit joints alike.
Outside joints can only be sealed when they’re dry, so work in Colwood is booked around the forecast. Let us know about access to every wall, plus any garages or outbuildings.
Our work is backed for twelve months.
- Place
- Colwood (RH17)
- Wider area
- West Sussex
- Guarantee
- One year on every job
- Quotes
- A clear price before we start
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Walls and rooflines in Colwood
London and the South East are among the drier parts of the UK, yet outdoor joints still have to be sealed dry, so jobs are booked with the weather in mind. With historic houses such as Tyes Place (about 3.4 miles north-east) nearby, there’s older building stock in the area around Colwood as well as newer homes. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth.
Around Colwood, as everywhere, gutter sealing is only as good as the preparation behind it.
Colwood is about 5 miles north-west of Burgess Hill, in West Sussex. Homes, rented property, offices and hotels in Colwood can book us for gutter sealing, old or new, large or small. Every job comes with our one-year guarantee. We cover 371 towns and villages across West Sussex, large and small. Our Crawley page covers work nearby.
Postcode districts we cover here for gutter sealing: RH17. Whether your property is on Earwig Lane and Cross Colwood Lane or a nearby road, we can help. Close by, we work in Crabtree (1 mile north-west), Lower Beeding (2 miles north-west), Slaugham (3 miles north), Plummers Plain (3 miles north) and Monk's Gate (3 miles north-west). We also work in nearby towns such as Crawley (8 miles north), Horsham (6 miles north-west), Worthing (15 miles south-west), Haywards Heath (6 miles east), Burgess Hill (5 miles south-east) and East Grinstead (13 miles north-east).
Landmarks near Colwood
Typical jobs here are in homes near Leonardslee. A little further out are The Dene Hospital (3.8 miles south-east) and Cuckfield Museum (3.7 miles east). Open spaces near Colwood include Blunts Wood and Paiges Meadow.
DIY versus a professional 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.
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Surface by surface
Gutter joints
Joints between gutter lengths are the most common leak point. They’re cleaned out, dried and resealed.
Garage door frames
Resealing a garage door frame keeps rain and draughts out.
What we do, step by step
Once we’re on site, we compare the joints with what we discussed. If anything is different, we explain it before carrying on. After that, the work takes a few hours, depending on the number of joints and the access. In a small place like Colwood, access is normally the main thing to plan. If the job is outside, mention outbuildings, exposed walls and how to reach them.
- First we trace the drip and check the gutter is not damaged.
- We remove the old sealant and clean the joint.
- The joint is dried before sealing.
- We seal the joint with a sealant made for gutters.
- The gutter is checked and debris around the joints cleared.
Getting ready for the visit
- Mention any parking rules near the property
- Tell us about access, such as stairs, a lift or high-level joints
- Clear items away from the joints we’re working on
How to get a quote
It all starts with a short chat. Tell us what’s wrong, where it is and how much there is, and we’ll explain how we’d tackle it. Whenever you’re ready, call 0345 464 0079 or email us.
Related advice
Keeping the joints in good condition
How long the joints last depends on use and care. We suggest:
- Look for streaks or damp on the wall below gutters
- Don’t leave a sagging gutter
- Rest ladders on the wall, not the gutter
- Look along the fascias for open joints
Look at fascia and trim joints when you’re checking the gutters. Splits are easier to seal early.
If an end cap is dripping, deal with it before winter. A winter of drips can lead to damp patches.
Towns and villages near Colwood
Also in Colwood
Questions from Colwood
Will you come out to Colwood?
Yes, Colwood is covered. Our work covers London and the South East, and smaller places are part of that. Longer journeys are simply planned in advance.
Can you do gutter sealing in Colwood?
Yes, Colwood is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or email us and tell us what needs doing, and we’ll give you a clear price.
Can I do it myself?
Some simple jobs can be done by a careful DIYer. The usual mistakes are sealing over old sealant, sealing a damp joint and using too much.
How long does the job take?
A typical job takes an hour or two for a few joints, longer for a full run. We will confirm how long when we quote.
Can tenants book the work?
We can work for tenants, landlords or agents. Get your landlord’s agreement first.
Are you fully insured?
Yes. We’re fully insured, and we have been doing sealant work for more than 20 years.
Can you seal over the old sealant?
No. Fresh sealant does not stick to old sealant, and it traps any mould or water underneath. It all has to come out first.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. Our area covers South East England, London and Scotland.
How we quote for gutter sealing
For a quick quote, just ask. What matters most is:
- How many areas need sealing
- When we can work, for business premises
- The old material and how stubborn it is
- Any mould that needs treating
A few things move the cost up or down: how much old sealant there is and how stubborn it is, any mould to treat, and whether we need extra access for height. Your quote takes all of that into account.
What to tell us for a quote
The more you tell us, the more accurate the quote. When you get in contact, it helps to mention:
- Photos by email, if that is easy
- How many joints, rooms or windows are involved
- The problem you’ve noticed
- Whether it’s a home or a business
For a quote, call 0345 464 0079 or email us and tell us where the job is and what the problem looks like. We will give you a clear price before any work starts.
Leave it or put it right?
Sealant will not clear a blocked downpipe. We check the cause first and tell you if something else is needed. Where a wall is exposed, as many are in small places like Colwood, wind-driven rain gets into any failed joint, and damp in older walls is slow to dry out.
What you pay reflects the work, not a rough estimate. That is why we ask about the job first and give you a clear quote before any work starts.
Why book with us
- Homes, businesses and hotels
- 180+ five-star Google reviews
- A sealant colour to suit the surroundings
- Sanitary silicone with an anti-fungal additive in wet areas
Take a look at how sealant jobs are priced or our reviews.