Greater London · England
New-build mastic & snagging in Colindale, Greater London
New-build sealant joints in Colindale need attention? We cut out the old, prepare the joints and apply the right sealant, with a 12-month guarantee.
- Sealant applied over dusty or wet surfaces
- Gaps between new skirting and floors
- Worktop and upstand sealant coming away
New build mastic around Colindale
Rainfall in the South East is lower than in much of the UK, though outdoor sealant still has to go onto a dry joint, so the forecast decides the day. Much of London’s new housing is flats in larger developments, where snagging may go through the developer or managing agent.
For new homes near Hendon station, it’s worth checking the sealant early, while snags are still fresh. Colindale is in London, so parking needs planning: let us know about parking bays, permits or a driveway.
Colindale is about 1 mile south-east of Burnt Oak, in Greater London. Jobs in Colindale get the same care as everywhere else we work: old sealant removed completely, careful preparation and a 12-month guarantee. Across Greater London, we cover 764 places, and Colindale is one of them. There’s also a page for London, roughly 9 miles from Colindale.
We cover every part of the NW9, NW4 and HA8 postcode area for new build mastic. We cover properties on Cecil Road, Booth Road and Ajax Avenue. Colindale sits on or near the A5150. We also cover the places around Colindale: West Hendon (1 mile south), The Hyde (1 mile south), The Burroughs (1 mile east), Hendon (1 mile south-east) and Kingsbury (1 mile south-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).
Local landmarks in Colindale
Typical jobs here are in homes near Sunny Hill Park, Saracens High School and Kisharon College. For rail, the closest station is Hendon station, roughly 1 mile south-east of the centre. Well-known places in the area include Edgware Community Hospital (1.3 miles north-west) and Brent Cross Shopping Centre (1.5 miles south-east). Open spaces near Colindale include Darland's Lake and Parliament Hill.
About our new build mastic in Colindale
Some new-home owners let the house settle before resealing. That makes sense for small gaps that are just cosmetic, but a seal that is letting water through needs doing now. We’re often asked to deal with internal frame sealant that has split and worktop and upstand sealant coming away, on bathrooms & en suites, kitchens and show homes.
From brand-new flats to converted terraces with new flooring, London has every kind of floor. Wherever a floor meets a wall, a skirting or a threshold, the joint has to allow for movement, in Colindale as anywhere.
All of our work is guaranteed for twelve months, in Colindale and everywhere else we cover.
- Place
- Colindale (NW9, NW4, HA8)
- Wider area
- Greater London
- Cover
- One year on every job
- Quotes
- Quoted before any work starts
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Colindale questions
Can you do new build mastic in Colindale?
Yes, Colindale is within the area we cover. Our work covers London and the South East. Just call 0345 464 0079 or drop us an email with a few details of the job.
Is parking a problem for a job in Colindale?
London parking needs a little planning, so let us know about permits, bays or a driveway when you book. The visit is then planned around what’s available.
What information do you need?
Let us know what needs doing and where. We will ask anything else we need to know.
Is it worth resealing while the house is still settling?
That depends on the joint. Failed seals in wet areas need doing now, while small cosmetic gaps can wait a while.
Can I do it myself?
For a simple, easy-to-reach joint, a careful DIYer can do a reasonable job. Most DIY failures come from sealing over old material, wet joints or too much sealant.
Why has my new-build shower seal failed already?
New homes dry out and move in their first couple of years, and sealant is often applied quickly onto dusty surfaces. Either can make it fail early.
Where are you based?
We’re a Crawley-based firm, with over 20 years’ experience. Our area covers South East England, London and Scotland.
Will it make a mess?
We keep the work tidy. We protect what’s around the joints, and the area is left clean when we finish.
What we can’t put right
We will always be straight with you, so here’s what sealant cannot fix:
- Cracked trays, tiles or worktops
- Deciding who is responsible under a builder’s warranty
- Baths and trays that move too much for sealant to cope with
Not sure which it is? You can ring 0345 464 0079 or send us an email and we will tell you honestly.
Joints and surfaces we work on
- Show homes
- Kitchens
- Bathrooms & en suites
- Skirting & floors
- Windows & doors
- Plot handovers
What happens if it’s left?
Small cosmetic gaps can wait for the house to settle, but a leaking seal can’t. If you’re unsure which you have, call 0345 464 0079 or email us with photos. Damp from a failed joint spreads quietly in older London brickwork and timber, and once it shows in Colindale, the repair is bigger than a sealant job.
Rather than a set price list, we look at what your job involves: how many joints, what’s in them now and how we reach them. You’ll know the price before we begin.
Why Colindale customers choose us
- Colour picked to suit the job
- Quality sealants from Arbo and Everbuild
- Any old sealant cut out fully, not covered over
- White, clear, grey or another colour, product permitting
Read how sealant jobs are priced and our reviews.
Surface by surface
Plot handovers
We work through plots to your schedule, sealing each room ready for handover. Joints are prepared properly before sealing so the sealant lasts.
Skirting and floors
Where the floor meets a bath panel or kitchen plinth, the joint keeps mop water out. They get a flexible, water-resistant sealant.
Can I do it myself?
If you’ve already had a go yourself, that’s fine. We remove it and do the joint properly.
Sealing over old silicone is the commonest DIY error. Silicone does not stick to old silicone, so it lifts and traps water and mould underneath. Everything old must be removed first.
What affects the cost of new build mastic
The price is agreed before any work begins. It’s based on:
- The number of rooms or windows
- Any working-time requirements on site
- The number and length of the joints
- How easy the joints are to reach
What it costs depends on the size of the job, how hard the old material is to remove and access to the work. We give a clear quote before we start.
What we need to know
Photos help, but a description is a good start. Please mention:
- Where the property is
- The type of property
- If someone has resealed it before
- What the problem is, such as mould, gaps, leaks or cracking
Call for a quick quote, or send an email if you’d rather. Tell us about the joints that need doing and we’ll talk you through the work before giving you a price.
What happens on the day
Most of a good job is in the preparation, and we don’t rush it. Every joint is cleaned and dried before new material goes in. In total, it normally takes a few hours for most snagging lists, longer for a run of plots. In Colindale, as in most of London, parking needs a little planning. A visitor permit or a nearby bay makes the visit run more smoothly.
- Each joint is checked for movement before we start.
- Old sealant is cut out and the joints cleaned.
- Joints are dried and primed where the product calls for it.
- New sealant goes in, with baths filled first so they’re at their heaviest.
- The finished joints are checked and the cure times given.
Getting ready for the visit
- Plan for the work area to be out of bounds to pets and children
- Tell us about access, such as stairs, a lift or high-level joints
- Mention any leaks or damp you’ve noticed
Getting a quote
We quote each job on its own. Simply ring 0345 464 0079 or drop us an email and describe the job and send pictures if you have them.
Related advice
Work for landlords, hotels and businesses
Letting agents and landlords in Colindale can book us as well as householders. Sealant work between tenants keeps a property looking cared for before the next move-in.
From a single let to a portfolio, the work is the same standard: old sealant fully removed, joints prepared properly and a 12-month guarantee.