Greater London · England
Gutter Sealing in Grahame Park
We cover Grahame Park for sealing leaking gutter joints, end caps, fascias, soffits and roofline trims. Old sealant removed completely, joints prepared properly and a 12-month guarantee.
- Streaks down the brickwork from a leaking joint
- Old sealant on roofline trims that has split
- Damp patches inside below a leaking gutter
Gutter sealing in Grahame Park, done properly
We do not replace gutters, fascias or roofs. Sealant fixes joints; it will not fix a broken bracket, a cracked section or a blocked downpipe. If you have quick sealant fixes on gutters that didn’t last and old sealant on roofline trims that has split, we can put it right, on roofline trims, uPVC fascias and garage door frames alike.
Outside work in London starts with access: side passages, upper floors and where to park. In Grahame Park, joints up high may need ladders or other access, which is worth talking through when you book.
We stand behind the work with a 12-month guarantee, so you are covered after we’ve gone.
- Where
- Grahame Park (NW9, NW7, NW4)
- Region
- Greater London
- Guarantee
- One year on every job
- Price
- A clear price before any work starts
- Phone
- 0345 464 0079
- Page updated
- 26 October 2026
What we do, step by step
The work is kept neat and contained to the area we’re working on, so you can get on with your day. Expect the work to take an hour or two for a few joints, longer for a full run. In a London area like Grahame Park, the main things to plan are parking and access: tell us about permits, visitor bays or off-street space, which floor we are working on and whether there’s a lift.
- First we trace the drip and check the gutter is not damaged.
- The old sealant and dirt are cleaned out of the joint.
- We dry the joint so the new sealant can bond.
- We seal the joint with a sealant made for gutters.
- We check the run and clear debris near the joints.
Getting ready for the visit
- On commercial sites, let us know about site rules
- Keep pets and children clear of the area while we work
- Tell us about any water getting in
Get a quote
Call for a quick quote, or send an email if you’d rather. Describe what needs sealing and we will talk you through the work.
Read more
Signs you need gutter sealing in Grahame Park
Debris in the gutter keeps water sitting at the joints. Standing water finds the weakest joint and leaks out.
It’s worth asking for a quote if you see:
- Open joints in fascias and soffits
- Water dripping where gutter sections meet
- Damp on an inside wall under a dripping gutter
- End caps that drip every time it rains
As a London address, Grahame Park can be tricky for parking: let us know about parking bays, permits or a driveway.
What your quote should include
- When the joint can take water or movement
- What happens if they find a problem under the old sealant
- How the colour is chosen
- How much experience the applicator has
For landlords and businesses
We work for letting agents and landlords as well as homeowners. Resealing between tenancies keeps a property looking cared for.
For anyone letting property in or around Grahame Park, several properties can be quoted together. Send us the addresses and the work at each, and photos by email help.
Gutter sealing in Grahame Park: local notes
Historic houses like Heath Hall (about 3.5 miles south-east) are a reminder that the area around Grahame Park 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. The South East is one of the drier parts of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day.
Schools such as St James' Catholic High School are buildings too, and larger buildings have long runs of movement joint that eventually need resealing. Letting a property close to Mill Hill Broadway station? Then a dripping gutter joint or loose fascia trim is easy to miss until damp shows inside.
Grahame Park is about 1 mile south-east of Burnt Oak, in Greater London. From the centre of Grahame Park to the outskirts, we cover gutter sealing for every kind of property, from flats and houses to offices and hotels. We cover 764 towns and villages across Greater London, large and small. For nearby work, see our London page (9 miles or so).
Postcode districts we cover here for gutter sealing: NW9, NW7 and NW4. Whether your property is on Hall Lane, Booth Road and Harrier Road or anywhere close by, our applicators can take on the job. With the M1 close by, Grahame Park is easy for our applicators to reach for gutter sealing. We also cover the places around Grahame Park: Burnt Oak (1 mile north-west), Mill Hill (1 mile north), The Hale (2 miles north-west), Edgware (2 miles north-west) and Little Stanmore (2 miles west). Further out, we also cover London (9 miles south-east), City of Westminster (7 miles south-east), Marylebone (7 miles south-east), Kensington (7 miles south), St Pancras (7 miles south-east) and Shoreditch (9 miles south-east).
Around Grahame Park
We work in homes and buildings around Sunny Hill Park, Blessed Dominic Catholic Primary School and The Greyhound pub and the streets around them. Grahame Park’s nearest station is Mill Hill Broadway station, about 0.9 miles north of the centre. Nearby you will also find Broadwalk Centre (1.7 miles north-west) and Church Farmhouse Museum (0.8 miles south-east). Open spaces near Grahame Park include Copthall South Fields and Parliament Hill.
Also near Grahame Park
Other services in Grahame Park
FAQs for Grahame Park
Can you do gutter sealing in Grahame Park?
Yes, Grahame Park is within the area we cover. We work across London and the South East. You can ring 0345 464 0079 or drop us an email and tell us what needs doing, and we will send you a clear quote.
Can you help a landlord with a rental near Mill Hill Broadway station?
Yes, landlords and agents are among the people we work for, and several properties can be quoted together. Just ring 0345 464 0079 or send us an email with the address and what needs doing, and we’ll give you a clear quote.
Will the old sealant be removed?
Yes, every time. New silicone doesn’t stick to old silicone, so any old material comes out before anything new goes in.
Are you ARBOMaster approved?
Yes. We’re ARBOMaster approved, the scheme for applicators of Arbo sealants.
Where is Mr Mastic based?
Our base is in Crawley, and we work across South East England, London and Scotland.
What sealant do you use?
The product depends on the job: anti-fungal sanitary silicone in wet areas, and other sealants where joints move or face the weather. Brands we use include Arbo and Everbuild.
Do you have insurance?
Yes. We’re fully insured, and we can confirm the details when we quote.
Can you fit new guttering?
Replacement isn’t our trade. We’ll tell you if the gutter needs replacing so you can call the right trade.
What affects the cost of gutter sealing
Call for a quick quote. The main things that affect it are:
- Mould in or behind the old joints
- The amount of work
- Working hours on commercial sites
- Which sealant suits the joint
Combining jobs into one visit is generally more efficient than separate visits. You will get one clear quote for the whole job.
Helping us quote
The more you tell us, the more accurate the quote. When you ask for a quote, tell us:
- The problem you’ve noticed
- A few photos by email, if you can
- The address or postcode of the job
- The type of property
For a quote, phone 0345 464 0079 or send us an email and tell us where the job is and what the problem looks like. You will have a clear quote before any work starts.
When it isn’t the sealant
We’d rather tell you now than do work that won’t last, so here’s what sealant can’t put right:
- Gutters that have dropped or pulled away
- Boards that have decayed or split
- Downpipes that are blocked or broken
If you are not sure, just ring 0345 464 0079 or drop us an email and we will give you a straight answer.
What we seal
- Soffit joints
- Gutter end caps
- Roofline trims
- Garage door frames
- uPVC fascias
- Gutter joints
Aftercare tips
Simple care keeps the joints in good condition. Our advice:
- Check that water runs out of the downpipes
- Do not lean ladders against the gutter itself
- Clear leaves and moss from the gutters
- Keep an eye out for wet patches below a joint
Check the joints after heavy rain. It’s the easiest time to see a leak.
A leaking stop end is best sealed before the wet months. A winter of drips can lead to damp patches inside.
Can I do it myself?
A DIY attempt doesn’t rule out a professional job. We remove it and do the joint properly, so tell us about it when you ask for a quote.
Some sealant jobs are within reach of a careful DIYer, such as a straightforward joint indoors. The common mistakes are sealing over old sealant, sealing a damp joint and using far too much.