Greater London · England
Gutter, fascia & soffit sealing in Mitcham, Greater London
Gutter sealing across Mitcham and nearby, with every bit of old sealant taken out first.
- Wet patches on the wall under a gutter joint
- Dripping gutter ends
- Earlier gutter repairs that have peeled off
Gutter sealing for homes and businesses in Mitcham
We do not replace gutters, fascias or roofs. What sealant does is close joints and it can’t mend broken brackets, split sections or blocked downpipes. We’re often asked to deal with drips from gutter joints and end caps and failed sealant on a garage door frame, on roofline trims, uPVC fascias and garage door frames.
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, and both kinds of building are found across London.
Big or small, it’s backed by our one-year guarantee in Mitcham and across Greater London.
- Place
- Mitcham (CR4, SW16, SM4)
- Wider area
- Greater London
- Cover
- One year on every job
- Price
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
Leave it or put it right?
Sealing over a dirty, wet joint is a quick fix that rarely lasts but it tends to peel off. Proper preparation is the difference. In older London homes, water behind a failed joint soaks into brick and timber without much sign, and once it shows in Mitcham, the repair is bigger than a sealant job.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you’re not sure whether it needs doing, phone 0345 464 0079 or drop us an email and we will give you an honest view and a quote.
Why choose Mr Mastic in Mitcham
- Over 20 years’ experience
- Fully insured
- Any old sealant cut out fully, not covered over
- You choose the colour before work begins
Read what affects the cost and customer reviews.
When something else is needed
Sealant isn’t the answer to every problem, and we will tell you before work begins. It won’t solve:
- Roof leaks, slipped tiles or failed flashing (a roofer’s job)
- Blocked downpipes
- Boards that have decayed or split
If you are not sure, just ring 0345 464 0079 or send us an email and we’ll give you a straight answer.
What we seal
- Garage door frames
- Soffit joints
- Roofline trims
- uPVC fascias
- Gutter joints
- Gutter end caps
Work for landlords, hotels and businesses
Mouldy or split sealant often shows up at the end of a tenancy, and it’s quick to put right between tenancies. Several properties can be quoted together.
Housing providers, facilities teams and property managers book us too. Several sites can be quoted together.
Gutter sealing in Mitcham: local notes
With historic houses such as Southside House (about 3.6 miles west) nearby, there’s older building stock in the area around Mitcham as well as newer homes. Where a home is older, older walls and rooflines need a sealant that moves with them and suits the material. London terraces and converted houses often share gutters, downpipes and walls, so check who is responsible for the outside before booking.
Schools such as St Thomas of Canterbury Catholic Primary School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. In the older streets around St. Mark's Church, older walls, gutters and the joints where extensions meet them need a flexible sealant. As a London address, Mitcham can be tricky for parking: let us know about parking bays, permits or a driveway.
Mitcham is about 2 miles west of Thornton Heath, in Greater London. Homes, rented property, offices and hotels in Mitcham can book us for gutter sealing, old or new, large or small. Every job comes with our 12-month guarantee. Mitcham is one of 764 towns and villages in Greater London we cover. You can also see our page for London, about 7 miles away.
All of CR4, SW16 and SM4 is within our area for gutter sealing. Whether your property is on Kings Road, Baker Lane and Manor Road or anywhere close by, we can help. Close by, we work in Hackbridge (1 mile north), Eastfields (1 mile north), Colliers Wood (1 mile north-west), Merton Abbey (2 miles north-west) and Furzedown (2 miles north). Larger places within reach include London (7 miles north), City of Westminster (8 miles north), Marylebone (8 miles north), Kensington (7 miles north), St Pancras (9 miles north) and Shoreditch (9 miles north).
Around Mitcham
We work in homes and buildings around The Archbishop Lanfranc School, St Mark's Church of England Academy and The White Lion of Mortimer pub. The closest station to Mitcham is Mitcham Eastfields station, about 0.5 miles north of the centre. A little further out are Wandle Industrial Museum (0.7 miles west) and Centrale Croydon (2.7 miles south-east). Not far away are Duppas Hill and Cranmer Green.
What we do, step by step
At the end, we look at the finished work together and tell you how long to leave it. The visit itself usually takes anything from an hour or two to a few hours, depending on the amount of work. Many London jobs are in flats, so we come ready for stairs, narrow hallways and shared entrances. If the building has a concierge, managing agent or access rules, tell us when you book.
- We look at where the water is coming from and check the gutter isn’t broken or sagging.
- Old sealant and dirt are removed from the joint.
- We make sure the joint is dry before sealing.
- Gutter or exterior sealant is applied and finished.
- We look along the gutter and clear debris around the joints.
Before we arrive
- Mention any parking rules near the property
- Mention any leaks or damp you’ve noticed
- Let us know about stairs, lifts or work at height
Get a quote
For a quick quote, get us on the phone, or email us if that’s easier. Describe what needs sealing and we will explain what’s involved and give you a clear quote.
Advice
How the job changes by surface
Gutter joints
Gutter joints move and sit in water. A dedicated gutter sealant suits them.
uPVC fascias
We seal fascia joints, not replace the boards. Damaged boards need replacing by an installer.
Mitcham questions
I let a flat near Mitcham Eastfields station. Can you help?
Yes, we work for landlords and letting agents. You can call 0345 464 0079 or email us with the address and a few details, and we’ll give you a fixed price before work begins.
Is Mitcham in your area for gutter sealing?
Yes, Mitcham is within the area we cover. We work across London and the South East. You can phone 0345 464 0079 or email us and let us know what needs doing.
Do the sealants smell?
There can be a smell while the sealant cures. Ventilation helps.
What guarantee comes with the job?
All our work carries a one-year guarantee.
Do I need to be at home?
That depends on where the joints are. For work indoors, someone needs to let us in.
What about gutters on a second or third storey?
Single-storey work is the most straightforward. We’ll confirm the access for higher gutters before we book.
Can you match the sealant colour?
Usually, yes. Sealants come in white, clear, grey and other colours, and we agree the colour with you before any work starts.
How long does the job take?
That depends on the amount of work, but as a guide it takes an hour or two for a few joints, longer for a full run. We will give you a better idea when we quote.
How to look after the new joints
No joint lasts for ever, but care makes a real difference. A few tips:
- Check the gutters during heavy rain
- Look for streaks or damp on the wall below gutters
- Get a dropping gutter looked at quickly
- Get leaks sealed before the wet months
Give the sealant the cure time we tell you and avoid disturbing it.
Early sealing limits how much water hits the wall. We’ll let you know if the gutter needs more than sealant.
Towns and villages near Mitcham
Other services in Mitcham
What affects the cost of gutter sealing
The quote reflects the job in front of us. We take into account:
- Which sealant suits the joint
- Access and height
- The old material and how stubborn it is
- Any mould that needs treating
Every job is a little different, so each one gets its own quote. Size, access and the product the joint needs all play a part.
What we need to know
When you contact us, these details help:
- How we’d reach the joints
- Any previous sealing or DIY work
- How many joints, rooms or windows are involved
- The address or postcode of the job
Need a quote? Please call 0345 464 0079 or send us an email and tell us about the job. You will know what we plan to do, and what it will cost, before any work begins.