Greater London · England
Hendon Gutter Sealing
Gutter sealing for Hendon, by sealant specialists with 20+ years’ experience. 180+ five-star Google reviews and a 4.9 rating.
- Old sealant on roofline trims that has split
- Water dripping where gutter sections meet
- Open joints in fascias and soffits
For landlords and businesses
A neglected joint can let water reach the structure, which matters even more when someone else lives there. Resealing at the right time is simple maintenance.
Letting agents often deal with us directly. Tell us the address, the job and how access works and we’ll quote.
Gutter sealing in Hendon, done properly
We work across Hendon on leaking gutter joints and roofline trims. Low-level work is straightforward, and for higher work, tell us about access and we’ll confirm what’s needed. Common call-outs are for wet patches on the wall under a gutter joint and leaking gutter joints and stop ends, across uPVC fascias, gutter joints and garage door frames.
In London terraces and converted houses, gutters and walls are often shared with the house next door, so one failed joint can cause damp for more than one household. For a flat in Hendon, check the lease for who looks after the outside.
We stand behind the work with a 12-month guarantee, so you’re not left on your own once the job is done.
- Place
- Hendon (NW4, NW9, NW2, NW11)
- Region
- Greater London
- Cover
- 12 months on all our work
- Price
- A clear quote up front
- Telephone
- 0345 464 0079
- Last updated
- 26 October 2026
What affects the cost of gutter sealing
Call for a quick quote. What matters most is:
- The product the joint needs
- Any working-time requirements on site
- The old material and how stubborn it is
- How much there is to do
Combining jobs into one visit is normally more efficient than separate visits, so tell us about everything that needs sealing. We’ll give you a clear price for the lot.
What to tell us for a quote
A few details help us give you an accurate quote. When you ask for a quote, tell us:
- If someone has resealed it before
- Access, such as stairs, a lift or height
- If it’s domestic, commercial or a hotel
- How many joints, rooms or windows are involved
Every job is quoted individually, so the first step is telling us about yours. Simply phone 0345 464 0079 or drop us an email and describe the job.
How it works
Every visit runs the same way: we check the joints, protect the area around them, carry out the job and clear up. Most jobs take an hour or two for a few joints, longer for a full run. In a London area like Hendon, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we’re working on and whether there’s a lift.
- First we agree which joints need sealing.
- Each joint is cleaned and any old sealant removed.
- We make sure everything is dry.
- We apply exterior or gutter sealant and finish it neatly.
- We check our work before we leave.
Preparing for the visit
- Tell us about any water getting in
- Tell us if parking is tricky
- Mention any tricky access
Ask for a quote
If you’re in Hendon and need gutter sealing, call 0345 464 0079 or drop us an email. A short description of the job and where it is helps us quote, and we’ll agree the price before any work begins.
Advice
Common questions in Hendon
Can you help a landlord with a rental near Hendon station?
Yes, landlords and agents are among the people we work for. Just call 0345 464 0079 or drop us an email with the address and what needs doing, and we’ll send you a clear quote.
Is parking a problem for a job in Hendon?
Parking in Hendon, as in most of London, takes a little planning: a visitor permit or a bay close to the door helps a lot, so mention what’s available when you book.
Can I choose the sealant colour?
Yes. Sealants come in white, clear, grey and other colours for many products, and we will agree it with you first.
Are you an approved applicator?
Yes. Mr Mastic is an ARBOMaster approved applicator, and we’re fully insured.
Where is Mr Mastic based?
Our base is Crawley, with over 20 years’ experience. We work across South East England, London and Scotland.
Is it messy?
No. We work neatly, protect the area around the joints and tidy up afterwards.
Do you come to Hendon?
Yes, we do. Hendon is part of the area we cover.
Do I need to be at home?
Access is agreed with you when the job is booked. Indoors, that usually means someone at home.
Different surfaces, different methods
Gutter end caps
Drips from a stop end run down the brickwork. It’s a small job to fix.
Soffit joints
Soffit joints are sealed in a colour to suit, where one is available.
Nearby places to Hendon
Other services in Hendon
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.
Sealing over old silicone is the commonest DIY error. Silicone doesn’t stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
Signs you need gutter sealing in Hendon
Gutter joints depend on seals that wear out. Sun and cold make the gutter expand and contract, and old seals crack or slip.
Most people get in touch when they notice one of these:
- Damp patches inside below a leaking gutter
- Gaps along fascia and soffit joints
- Cracked sealant along roofline trims
- End caps that drip every time it rains
Managing a site like Hendon School? Then its movement joints, gutters and trims need looking after like any other building’s.
What to look for in a quote
- How the colour is chosen
- Whether the sealant suits the joint
- What guarantee comes with the work
- Whether they seal over old material or remove it
Why deal with it now?
A dripping stop end can soak the wall right through the wet months. Resealing it is a quick job before the damage spreads. Converted houses in London often have a bathroom above someone else’s living room, so a small leak from tired sealant can mean a neighbour’s ceiling and a lot of disruption. Putting it right early is much less trouble.
The cost reflects the work involved, not guesswork. That’s why we ask a few questions first and give you a clear quote before any work starts.
Why us?
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
- Experience in homes, commercial sites and hotels
- We agree the colour with you first
Read our cost guide and what customers say.
Outside joints around Hendon
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. In terraces and conversions, gutters and walls are often shared with the neighbours, so check who is responsible for the outside before booking.
In the older streets around Christ Church Hendon, an extension built onto an older house moves differently, and the joint between them takes the strain. As a London address, Hendon can be tricky for parking: tell us about permits, visitor bays or off-street space when you book.
Hendon is about 3 miles north-west of Hampstead, in Greater London. Whether you are in the middle of Hendon or further out, we cover gutter sealing for every kind of property. Our Greater London coverage runs to 764 places, Hendon among them. There’s also a page for London, about 8 miles away.
Our applicators cover all of the NW4, NW9, NW2 and NW11 postcode area for gutter sealing. You’ll find streets such as Church Road, Station Road and Sydney Grove. Hendon is on the A5 and A41, which makes it straightforward to reach. If you are just outside Hendon, we cover The Burroughs (1 mile north-west), Brent Cross (1 mile south), Staples Corner (1 mile south), West Hendon (1 mile west) and The Hyde (1 mile west). Further out, we also cover London (8 miles south-east), City of Westminster (6 miles south-east), Marylebone (6 miles south-east), Kensington (6 miles south), St Pancras (6 miles south-east) and Shoreditch (7 miles south-east).
Around Hendon
Locally, jobs take us to homes and businesses close to Hasmonean Primary School, The White Bear pub and Kisharon College, among other places. The closest station to Hendon is Hendon station, roughly 0.7 miles south-west of the centre. Well-known places in the area include Brent Cross Shopping Centre (0.5 miles south) and St Andrew's Hospital (1.6 miles south). Green spaces nearby include Darland's Lake and Parliament Hill.