Greater London · England
Gutter Sealing in High Barnet
Sealing leaking gutter joints, end caps, fascias, soffits and roofline trims in High Barnet, with a one-year guarantee on every job. Ask us for a quote.
- Wet patches on the wall under a gutter joint
- Rain getting in around a garage door
- Water dripping where gutter sections meet
Gutter sealing in High Barnet, done properly
Water dripping from a gutter joint can stain walls and soak the ground below. Often a reseal is enough, as long as the gutter is sound. If you have damp on an inside wall under a dripping gutter and earlier gutter repairs that have peeled off, we can help.
Newer London blocks are built with movement joints in brick and render, and with cladding joints sealed with mastic. Older terraces have their own weak points: gutter joints, roofline trims and the joint where an extension meets the original wall.
There’s a 12-month guarantee on every job.
- Location
- High Barnet (EN5)
- Wider area
- Greater London
- Cover
- One year on every job
- Quote
- Quoted before any work starts
- Phone
- 0345 464 0079
- Last updated
- 26 October 2026
High Barnet buildings and the weather
With historic houses such as Wyllyotts Manor (about 2.9 miles north) nearby, there’s older building stock in the area around High Barnet as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material. Rainfall in the South East is lower than in much of the UK, but outside sealant still needs a dry, clean surface, so outdoor work is planned around the forecast.
If you let a flat or house near Hadley Wood station, a gutter joint that drips onto the wall can turn into a damp complaint, so it’s worth checking. Managing a site like Foulds School? Then its movement joints, gutters and trims need looking after like any other building’s.
High Barnet is about 1 mile north-west of Barnet, in Greater London. Our applicators cover gutter sealing for homes and businesses in High Barnet and the surrounding area, as part of our work across Greater London. High Barnet is one of 764 towns and villages in Greater London we cover. London is on our list too, about 12 miles from High Barnet.
Every address in EN5 is within our area for gutter sealing, from the main roads to the quietest streets. If you need gutter sealing at a property on Byng Road, Park Road and Kings Road or a nearby road, we can help. High Barnet is on the A1081, so it’s easy for us to get to. Neighbouring places we cover for gutter sealing include Hadley (1 mile east), Arkley (1 mile south-west), Kitts End (1 mile north), Totteridge (1 mile south) and Rowley Green (2 miles west). We also work in nearby towns such as London (12 miles south-east), City of Westminster (10 miles south), Marylebone (10 miles south), Kensington (11 miles south), St Pancras (10 miles south-east) and Shoreditch (11 miles south-east).
Local landmarks in High Barnet
In High Barnet, that means homes and buildings near Susi Earnshaw Theatre School, The White Lion pub and Queen Elizabeth's School. High Barnet’s nearest station is Hadley Wood station, roughly 1.6 miles north-east of the centre. A little further out are Spires Shopping Centre (less than half a mile east) and Barnet General Hospital (0.5 miles south-west). The countryside around High Barnet includes Barnet Countryside Centre and Darland's Lake.
High Barnet: your questions answered
Is parking a problem for a job in High Barnet?
It can be, so it helps to tell us about permits, visitor bays or off-street space when you book. The visit is then planned around what’s available.
Can you help a landlord with a rental near Hadley Wood station?
Yes, rental work is part of what we do. Just phone 0345 464 0079 or drop us an email and tell us about the property, and we will give you a clear price.
What does gutter sealing cost?
We do not publish prices, because the cost depends on the job: how much there is, what’s there now, how we reach it and what it needs. You will get a clear quote before we start.
Can you match the sealant colour?
We help you choose a colour that suits, from white and clear to greys and other shades. The choice depends on the product the joint needs.
Is it possible to stop a gutter joint dripping with sealant?
In most cases, yes. A sagging or cracked gutter needs more than sealant, and we will tell you.
How long will you be here?
Typically it takes an hour or two for a few joints, longer for a full run. Larger jobs naturally take longer, and we’ll say how long yours will take.
Do you do commercial work?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
When is the sealant fully cured?
Many sealants skin over quickly but take longer to cure fully. We will tell you how long to leave the joint.
What happens on the day
Every visit runs the same way: we check the joints, mask and protect the surrounding surfaces, do the work and tidy away. It normally takes an hour or two for a few joints, longer for a full run. In High Barnet, as in most of London, parking needs a little planning. It helps if you can point us to a visitor permit or a bay close to the door.
- First we agree which joints need sealing.
- Each joint is cleaned and any old sealant removed.
- The joints are dried.
- We apply exterior or gutter sealant and finish it neatly.
- We check our work before we leave.
Getting ready for the visit
- For business premises, tell us about site rules or sign-in
- Mention any leaks or damp you’ve noticed
- Keep children and pets away from the work area
Get a quote
Every job is quoted individually, so the first step is telling us about yours. Just ring 0345 464 0079 or send us an email with the details and send pictures if you have them.
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How the job changes by surface
Roofline trims
We seal the trims, not the roof. A roofer deals with the roof itself.
Garage door frames
Garage door frames let rain in when their sealant fails. We cut it out and reseal.
Why it’s worth doing now in High Barnet
If the problem is a blocked downpipe, sealing won’t help. We check the cause first and point you to the right trade if needed. Damp from a failed joint spreads quietly in older London brickwork and timber, and by the time it shows on a wall or ceiling in High Barnet, the repair is bigger than the sealant job would have been.
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 we need extra access for height. Your quote takes all of that into account.
Why High Barnet clients choose us
- Full insurance on every job
- Anti-fungal silicone where joints get wet
- Arbo and Everbuild products
- Every job guaranteed for a year
See what affects the cost and what customers say.
Keeping the joints in good condition
Looking after new joints is easy, and it makes a real difference:
- Keep downpipes clear
- Don’t lean ladders against the gutter itself
- Get leaks sealed before the wet months
- Have sagging gutters refixed early
Have a look at the gutter during a downpour now and then. It’s the easiest time to see a leak.
Once roofline sealant splits, water can get behind it. Resealing early protects the boards and the wall below.
DIY versus a professional finish
Not every job suits DIY: work at height, external movement joints, fire-rated sealant and large areas need the right product, the right access and the right method.
The difference is mostly in the preparation and the product. Joints are cleaned back to sound surfaces and dried, and the sealant is chosen for how the joint moves and where it is.
Work for landlords, hotels and businesses
In hotels, rooms out of use cost money, so the work can be planned room by room around your bookings where we can. We’ve worked in hotels as well as homes and businesses.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
What we are called out for in High Barnet
Roofline sealant ages in sun and rain. It hardens, shrinks and splits over time.
The most common problems we see are:
- Streaks down the brickwork from a leaking joint
- Gaps along fascia and soffit joints
- Damp on an inside wall under a dripping gutter
- Rain getting in around a garage door
For an older house near a landmark such as Christ Church, the joints between older walls, newer extensions and the roofline need a sealant that can move.
What your quote should include
- What the quote includes, VAT included or not
- Are they insured?
- How much experience the applicator has
- Whether all the old sealant comes out first