Greater London · England
Roxeth Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for homeowners, landlords and businesses in Roxeth. ARBOMaster approved applicators, fully insured, with a one-year guarantee.
- Rain getting in around a garage door
- Stop ends leaking at the end of a run
- Old sealant on roofline trims that has split
How to look after the new joints
Looking after new joints is easy, and it makes a real difference:
- Watch for drips in a downpour
- Look for streaks or damp on the wall below gutters
- Look along the fascias for open joints
- Keep downpipes clear
A sagging gutter needs its brackets checked. If it drops, the joints will open.
A leaking stop end is best sealed before the wet months. A winter of drips can lead to damp patches inside.
How we handle gutter sealing in Roxeth
Water dripping from a gutter joint can stain walls and soak the ground below. Often a reseal is enough if the gutter isn’t damaged. Common call-outs are for end caps that drip every time it rains and open joints in fascias and soffits, across uPVC fascias, gutter end caps and roofline trims.
Outside work in London starts with access: side passages, upper floors and where to park. In Roxeth, joints up high may need ladders or other access, which is worth talking through when you book.
Our work is backed for twelve months.
- Place
- Roxeth (HA2, HA1, UB5)
- Wider area
- Greater London
- Cover
- A year, on every job
- Price
- A clear price before we start
- Phone
- 0345 464 0079
- Updated
- 26 October 2026
For landlords and businesses
We regularly work with letting and managing agents. Send the address, what’s needed and the access arrangements and we will give you a quote.
Mouldy or split sealant often shows up at the end of a tenancy. We can quote for more than one property at once.
When it isn’t the sealant
We’ll always be straight with you, so here’s what sealant cannot fix:
- Brackets that have snapped or loosened
- Blocked downpipes
- Cracked, split or warped gutter sections
If you are not sure, just ring 0345 464 0079 or send us an email and we will give you a straight answer before you book.
What we seal
- Garage door frames
- uPVC fascias
- Gutter joints
- Roofline trims
- Soffit joints
- Gutter end caps
Why it’s worth doing now in Roxeth
You do not need to replace a garage door because rain gets in round the frame. Sealing the frame normally stops it, if the frame itself is sound. In a London flat, a failed joint rarely stays your problem alone: water can reach the neighbours below, and gaps in fire-rated joints affect the whole building.
Commercial jobs are quoted on the same basis as homes: how much there is to do, how we reach it and what it needs. Call for a quick quote and we’ll go through it with you.
Why us?
- Approved under the ARBOMaster scheme
- Sealant colour chosen to suit
- We never seal over old sealant
- Anti-fungal silicone where joints get wet
Take a look at what affects the cost and customer reviews.
What we are called out for in Roxeth
Sealant on fascias and trims weathers like any outdoor joint. It hardens, shrinks and splits over time.
If you can see any of these, it’s time to have the joints looked at:
- Old sealant on roofline trims that has split
- Leaking gutter joints and stop ends
- Streaks down the brickwork from a leaking joint
- Old gutter sealant that has let go
Letting a property close to Sudbury Hill Harrow station? Then a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside.
What your quote should include
- How long the guarantee is
- What product goes in the joint
- How much experience the applicator has
- Whether all the old sealant comes out first
Roxeth: your questions answered
I let a flat near Sudbury Hill Harrow station. Can you help?
Yes. We work for letting agents and landlords as well as householders. You can phone 0345 464 0079 or email us with the details for a clear quote.
Is Roxeth in your area for gutter sealing?
Yes, Roxeth is within the area we cover. Our work covers London and the South East. You can call 0345 464 0079 or send us an email and let us know what needs doing.
Is it OK to seal over old sealant?
No, it won’t last. It may look fine at first, but the new layer lifts away from the old one. The old sealant has to come out completely.
Are you fully insured?
Yes, we are fully insured for every job we do.
Is gutter cleaning part of the job?
We clear what’s around the joints we work on. Full gutter cleaning is a separate job.
Can you seal fascia and soffit joints?
Yes, it’s a common job. The gaps are cleaned and sealed neatly with a suitable exterior sealant.
Where are you based?
Mr Mastic is based in Crawley. We cover Roxeth and the rest of Greater London.
How long does gutter sealing take?
That depends on the amount of work, but most jobs take a few hours, depending on the number of joints and the access. We’ll tell you when we quote.
DIY sealant or a professional job?
If you’ve already had a go yourself, that is fine. We remove it and do the joint properly, so just mention it when you contact us.
The biggest DIY mistake is sealing over old sealant. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. All the old material has to come out first.
Outside joints around Roxeth
Historic houses like Northolt Manor (about 1.9 miles south-west) are a reminder that the area around Roxeth has older buildings as well as new. In older buildings, older brick and stone need a sealant that suits them, at the right joint depth. 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.
For an older house near a landmark such as Christ Church, an extension built onto an older house moves differently, and the joint between them takes the strain. Schools such as Roxeth Primary School are buildings too, and movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
Roxeth is about 1 mile south of Harrow, in Greater London. Homes, rented property, offices and hotels in Roxeth can book us for gutter sealing. Every job comes with our one-year guarantee. We cover 764 towns and villages across Greater London, from the larger towns to small villages. We also work in London, around 12 miles away.
Postcode districts we cover here for gutter sealing: HA2, HA1 and UB5. Streets in the area include Lower Road, Grange Road and Dudley Road, and we cover them all. If you’re just outside Roxeth, we cover South Harrow (1 mile south-west), Harrow (1 mile north), Harrow on the Hill (1 mile east), Northwick Park (1 mile north-east) and Rayners Lane (1 mile west). Further out, we also cover London (12 miles south-east), City of Westminster (9 miles south-east), Marylebone (9 miles east), Kensington (8 miles south-east), St Pancras (10 miles east) and Shoreditch (12 miles east).
What’s near Roxeth
Around Roxeth, our work takes us to homes and buildings near The White Horse pub, Orley Farm School and Northwick Park. For rail, the closest station is Sudbury Hill Harrow station, about 0.8 miles south-east. Well-known places in the area include Clementine Churchill Hospital (0.7 miles east) and Kodak Museum (1.7 miles north). The countryside around Roxeth includes Northala Fields and Perivale Wood.
How the visit works
We bring everything the job needs with us, so there’s nothing for you to buy. Once we’ve agreed what’s being done, we protect the area and start. It normally takes a few hours, depending on the number of joints and the access. For a job in Roxeth, parking and access are the things to plan: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- We look at where the water is coming from and check the gutter is not broken or sagging.
- The joint or trim is cleaned out and old sealant removed.
- The area is dried so the sealant can bond.
- We seal the joint with a sealant made for gutters and outdoor use.
- The run is checked and any debris near the joints is cleared.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Move anything stored near the joints
- Plan for the work area to be out of bounds to pets and children
Getting a quote
There’s no standard price list, as no two jobs are quite the same. Instead, we send you a clear quote for your job. To arrange one, call 0345 464 0079 or drop us an email.