Greater London · England
Cranham Gutter Sealing
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims for homeowners, landlords and businesses in Cranham. Fully insured, ARBOMaster approved and guaranteed for a year.
- Leaking gutter joints and stop ends
- Cracked sealant along roofline trims
- Gaps along fascia and soffit joints
Surface by surface
Soffit joints
Open soffit joints let draughts in. We close them with a suitable sealant.
Roofline trims
Roofline trims rely on sealant at their joints. When it splits, water can get behind.
Gutter sealing for homes and businesses in Cranham
Sealant only bonds to a clean, dry joint. That is why we take out the old sealant and dirt first and the joint is dried before the new sealant goes in. Typical jobs include old gutter sealant that has let go and end caps that drip every time it rains, on roofline trims, gutter end caps and uPVC fascias.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Period houses have different weak points, such as gutter joints, trims and the line where an extension meets the old wall.
Your job is guaranteed for a year, as with all our work.
- Location
- Cranham (RM14)
- Region
- Greater London
- Cover
- A year, on every job
- Price
- Quoted before any work starts
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
Outside joints around Cranham
The South East is one of the drier parts of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast. In terraces and conversions, gutters and walls are often shared with the neighbours, so it’s worth agreeing who is responsible before work starts.
If you live in an older home near St Luke's Cranham, old and new materials meet at the roofline and walls, which is where sealant earns its keep. Rented homes near Upminster station change hands often, and leaking gutter joints on a rental are best caught before they stain the walls.
Cranham is about 2 miles east of Hornchurch, in Greater London. Anywhere in RM14, our applicators can take on gutter sealing. Our area takes in 764 places across Greater London. We also work in Chelmsford, about 15 miles from Cranham.
All of RM14 is covered for gutter sealing, from the main roads to the quietest streets. That includes homes and businesses on Avon Road, Moor Lane and Front Lane. Other places close to Cranham include Upminster (1 mile west), Puddle Dock (1 mile east), Upminster Bridge (1 mile west), North Ockendon (2 miles south-east) and Emerson Park (2 miles north-west). We also work in nearby towns such as Shoreditch (15 miles west), Walthamstow (13 miles west), Hoxton (15 miles west), Whitechapel (15 miles west), Orpington (14 miles south-west) and Plaistow (11 miles west).
What’s near Cranham
Around Cranham, our work takes us to homes and buildings near The James Oglethorpe Primary School, The Crumpled Horn pub and St. Andrew's Park and the streets around them. For rail, the closest station is Upminster station, roughly 0.7 miles west of the centre. Other landmarks nearby include The Mercury Mall (3.7 miles west) and Upminster Tithe Barn Museum of Nostalgia (0.6 miles north-west). The countryside around Cranham includes Cranham Brickfields.
Aftercare tips
No joint lasts for ever, but care makes a real difference. A few tips:
- Look for streaks or damp on the wall below gutters
- Watch for drips in a downpour
- Get leaks sealed before the wet months
- Keep ladders off the guttering
Leave the new sealant to cure as we advise before poking or cleaning near it.
A leaking stop end is best sealed before the wet months. A winter of drips can lead to damp patches.
What happens on the day
Once we are on site, we check the joints match what you told us. 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 Cranham, flats, stairs and shared entrances are part of the routine. Mention any building rules, key holders or managing agents when you book.
- First, we find the drip and check the gutter isn’t cracked or sagging.
- We clean out the joint and take out the old sealant.
- We make sure the joint is dry before sealing.
- Gutter or exterior sealant is applied and finished.
- We check the run and clear any debris we find while we are there.
Before we arrive
- Mention any leaks or damp you’ve noticed
- For business premises, tell us about site rules or sign-in
- Clear the area around the work
Get a quote
Getting a quote is simple: tell us what needs doing and where. Photos by email help us understand the job, and we’ll take it from there.
Related advice
Nearby places to Cranham
Also in Cranham
Why act early in Cranham
You do not need to replace a garage door because rain gets in round the frame. Sealing the frame generally stops it, if the frame itself is sound. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Cranham, the repair is bigger than a sealant job.
Some things make a job bigger or smaller: how much old sealant there is and how stubborn it is, any mould to treat, and whether the work is at height. We take all of that into account in your quote.
Why choose Mr Mastic in Cranham
- White, clear, grey or another colour, product permitting
- More than 20 years in sealant work
- Anti-fungal silicone where joints get wet
- We agree the colour with you first
Take a look at what affects the cost or customer reviews.
For landlords and businesses
For anyone letting property in or around Cranham, jobs at different addresses can be quoted together. Just tell us the addresses and what each one needs.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a one-year guarantee.
Cranham: your questions answered
I let a flat near Upminster station. Can you help?
Yes, we work for landlords and agents. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will send you a clear quote.
Can you do gutter sealing in Cranham?
Yes. We work across London and the South East, and Cranham is part of that. Just ring 0345 464 0079 or email us with a few details of the job.
Can I add another job to the visit?
Yes. More than one area can be quoted together.
Can you work on commercial sites?
Yes. We work in offices, washrooms, hotels and other commercial premises. We can talk about working times when we quote.
How long should I leave it?
That depends on the sealant used, so follow the cure time we give you.
Will sealing fix a sagging gutter?
No. If the gutter sags, the joints keep opening, so the brackets need fixing first.
Are you an approved applicator?
Yes. We hold ARBOMaster approved applicator status, and we are fully insured.
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.
When to call us in Cranham
Leaves and moss hold water in the gutter. Water that cannot drain works its way through a weak joint and leaks out.
If you can see any of these, it’s time to have the joints looked at:
- Quick sealant fixes on gutters that didn’t last
- Dripping gutter ends
- Damp patches inside below a leaking gutter
- Fascia boards with gaps between them
If you look after a building such as Hall Mead School, movement joints, cladding joints and gutters on larger buildings need the same care as a house’s.
What your quote should include
- Whether they’re fully insured
- Is the old sealant removed completely?
- How the joint is cleaned and prepared
- Is VAT in the price?
Honest limits
Some problems need a builder, plumber or other trade rather than us:
- Gutters that have dropped or pulled away
- Rotten or damaged fascia boards
- Cracked, split or warped gutter sections
If you are not sure, just phone 0345 464 0079 or send us an email and we’ll give you a straight answer before you book.
Surfaces we seal
- uPVC fascias
- Soffit joints
- Garage door frames
- Roofline trims
- Gutter joints
- Gutter end caps