Mastic contractors in New Barnet
Mastic packages for new-build and refurbishment projects throughout New Barnet and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Bath and shower joints scraped during the final clean
- Window and door perimeters that won’t pass inspection
- A mastic package split between trades with no clear owner
Construction mastic for businesses in New Barnet
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
FAQs: New Barnet
Do you cover business parks and estates near New Barnet, such as Hadley Manor Trading Estate?
Yes. Estates, retail parks and business parks around New Barnet, Hadley Manor Trading Estate among them, are all within reach. A few photos and the unit address let us price the work.
Can you work on a hospital site such as Barnet Hospital?
Yes, hospitals are one of the sectors we cover. We follow the site’s permits, sign-in and infection-control procedures in every area.
How do you work with the site programme?
We seal plot by plot or floor by floor as areas are released. The sequence is agreed with the site manager at the start and updated as the programme moves.
Can fire-rated sealing at service penetrations be included?
Fire-rated sealant can be included where it’s specified, installed to the product’s tested detail. The design and sign-off belong to the designer, fire engineer or building control.
How long does a job like this take?
It depends on the scope, though a typical visit normally takes anything from a day of snagging to several weeks of plot-by-plot sealing on a phased scheme. For bigger or phased jobs, we will set out a timescale with the quote.
What joints do you seal on a new build?
The scope comes from the specification and drawings, but frames, sanitary, kitchens, caulk where specified and snagging are typical.
What do you charge?
That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we’ll price it properly.
Construction mastic for commercial buildings in New Barnet
Perimeter sealing outside needs a dry joint and the right temperature. Cold or damp mornings, frost and condensation on frames can all hold external sealing up so it helps to sequence elevations with some flexibility. Internal areas can usually carry on while the outside waits. If you have a mastic package split between trades with no clear owner and oversized or tapered gaps around new frames, we can put it right, on window and door perimeters, brick and block movement joints and floor and skirting junctions alike. Facilities teams, main contractors and managing agents in New Barnet tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.
Around New Barnet, as across London, much of the work is refurbishing existing buildings as well as building new ones. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.
Every job ends the same way: guaranteed. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Where
- New Barnet (EN5, EN4, N20)
- Region
- Greater London
- Cover
- A 12-month guarantee
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
When to call us in New Barnet
Three-sided adhesion is a frequent fault on new work. Bonded to the base of the joint and both sides, sealant can’t stretch evenly.
Look out for the following:
- New external sealant already peeling away
- Window and door perimeters that won’t pass inspection
- Bath and shower joints scraped during the final clean
- Failed sealant in an existing building being refurbished
New wings at hospitals like Barnet Hospital, 1.9 miles west of New Barnet, bring long runs of window and panel joints to seal.
Before you book anyone
- Whether their applicators hold CSCS cards
- Which product they’ll use, and why it suits the joint
- How they’ll work around occupants
- Health and safety accreditation such as CHAS
What sealant work can’t fix
Before quoting, we check that sealant is the right answer. It isn’t the answer for:
- Defective windows, doors or glazing units (the supplier or installer’s job)
- Joints damaged after sign-off by following trades
- Joint design decisions that belong to the architect or engineer
Not sure which it is? You can give us a call on 01277 525 020 or email drawings and photos and we will tell you honestly before you book.
Joints and surfaces we work on
- Sanitary and kitchen joints
- Cladding and panel joints
- Internal decorators’ caulk
- Floor and skirting junctions
- Window and door perimeters
- Brick and block movement joints
Surface by surface
Snagging before handover
The last pass before handover is where mastic snags are cleared. We can work through the snag list area by area.
External facade and movement joints
Brickwork, blockwork and panel movement joints need a sealant with the right movement capability. Depth is controlled with backing rod so the bead bonds to two sides only.
Diagnose, treat, sign off
A typical day starts with protection: tape along each joint edge and covers over finishes, stock and equipment close by. The work itself usually takes a few days on a modest refurbishment and longer on multi-plot or multi-storey schemes, and we clear our waste as we work. All of Greater London is in the ULEZ, and kerbside space in New Barnet can be scarce. If there’s a loading bay, a car park or a permit we can use, tell us when you send details.
- We walk the site or review drawings to understand the package.
- You receive a fixed quote covering scope, products and sequence.
- Paperwork is agreed and applicators are inducted on site.
- We seal plot by plot or floor by floor in line with the programme.
- Problems we find, such as oversized gaps, are raised straight away.
- The package is closed out, snags cleared and backed by our 12-month guarantee.
What we need from you
- Explain the parking and delivery arrangements
- Have the specification and drawings to hand
- Share your working hours and any access restrictions
Quotes
The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or ring 01277 525 020 or email a schedule or drawings to discuss it first.
Advice
Contractors’ notes for New Barnet
The area within 2 miles of New Barnet holds several hotels. Hotel extensions and refits typically have to fit around bookings, so mastic dates are tight. Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in New Barnet. Deliveries are booked and storage is tight, so mastic materials come in as needed.
On a campus such as Middlesex University (4.5 miles south-west of New Barnet), new teaching buildings and residences are normally built and refurbished around the academic year. For contractors at a college like Oak Hill College, 1 mile to the east of New Barnet, perimeters and internal sealant are timed for the holidays.
New Barnet is about 1 mile east of Barnet, in Greater London. Anywhere in EN5, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. New Barnet is one of 764 places in Greater London on our list for mastic packages. London is covered too, some 11 miles away.
Postcode districts covered here: EN5, EN4 and N20 for mastic packages. Streets here include York Road, Park Road and Henry Road, and sites on any of them can send details for a fixed quote. Close to New Barnet, our area also takes in Barnet (1 mile west), Cockfosters (1 mile north-east), East Barnet (1 mile south-east), Underhill (1 mile west) and Whetstone (1 mile south). Nearby towns on our patch include London (11 miles south), City of Westminster (9 miles south), Marylebone (9 miles south), Kensington (10 miles south), St Pancras (8 miles south) and Shoreditch (9 miles south-east).
Landmarks near New Barnet
Recent enquiries here include premises near Trent School Cockfosters, East Barnet School and The Alexandra pub and the streets around them. There’s a railway station in New Barnet itself: New Barnet station. Other landmarks nearby include Spires Shopping Centre (1.6 miles north-west) and Francis Skaryna Belarusian Library and Museum (2 miles south). Green spaces nearby include Greenhill Gardens and Darland's Lake.
Leave it or put it right?
Patching snags as they appear can feel quicker than a proper close-out. But one planned snagging pass through each area usually clears more for less disruption and saves applicators coming back again and again. We can run snagging as its own phase before handover. Access in London is hard enough to arrange once, so while access is arranged it pays to renew all failing joints, not just the worst.
The work involved drives the cost: stripping out, preparation, sealing, access and phasing. Call for a fixed quote.
Why us?
- 12-month guarantee on workmanship
- Fully insured
- One contact handling all your sites
- A range of standard colours, depending on the product
Take a look at what affects the cost or our accreditations.
Towns and villages near New Barnet
Other services in New Barnet
What sets the cost
Before we quote, we look at:
- Backing rod, priming and other preparation
- Whether old sealant has to be cut out first
- Phasing around occupants
- Access and working height
The price depends on the quantity of joints, what has to come out first and how the joints are reached. Call for a quote once you have the details.
What to include in your enquiry
To price the job accurately, we need to understand the site. Send us:
- Rough lengths or quantities, or drawings if you have them
- Photos of the joints, close up and from further back
- Specification clauses that apply
- When you need the work done
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.