Mastic contractors in Upper Holloway
Need construction mastic in Upper Holloway? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- External joints sealed in damp or cold conditions that are now failing
- Inconsistent sealant finishes from plot to plot
- Sealant knocked or painted over by other trades
Construction mastic in Upper Holloway
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
About our construction mastic in Upper Holloway
Mastic tends to be one of the final packages before handover. Mastic Doctor takes on mastic packages for main contractors and developers on schemes in Upper Holloway, following the trades through the building as rooms and elevations become ready. We work on internal decorators’ caulk, floor and skirting junctions and sanitary and kitchen joints, and what we are called in for most is different trades sealing to different standards and internal caulk splitting as the building dries out. Searching for sealant specialists in Upper Holloway? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.
Construction in a London area such as Upper Holloway means working on constrained sites: small compounds, delivery slots and shared hoists and scaffold. Mastic is normally one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.
- Location
- Upper Holloway (N19, N7, N6)
- Region
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Construction mastic around Upper Holloway: how the place shapes the job
A 2-mile radius around Upper Holloway takes in plenty of hotels. Hotel refurbishments often run to tight programmes between busy periods, and perimeter and sanitary sealant has to keep up. As part of Greater London, Upper Holloway is inside the ULEZ, which applies to every van on site. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for.
On a campus such as American University in London, 0.8 miles east of Upper Holloway, new teaching buildings and residences are normally built and refurbished around the academic year. For a contractor working at a hospital such as The Whittington Hospital, less than half a mile to the north-west of Upper Holloway, perimeter and facade sealing is planned around patients and deliveries.
Upper Holloway is about 2 miles east of Hampstead, in Greater London. Across the N19 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. We work across 764 places in Greater London.
Commercial sites across N19, N7 and N6 are covered. Buildings on Ward Road, Kiver Road and Foxham Road are within our area for mastic packages. With the A103 nearby, Upper Holloway is easy to get to with materials and equipment. Sites close to Upper Holloway are covered too, including Tufnell Park (1 mile south), Dartmouth Park (1 mile south-west), Highgate (1 mile north-west), Nag's Head (1 mile south-east) and Holloway (1 mile south-east). Bigger towns within reach include London (5 miles south), City of Westminster (4 miles south), Marylebone (3 miles south), Kensington (5 miles south-west), St Pancras (3 miles south) and Shoreditch (4 miles south-east).
Landmarks near Upper Holloway
Locally, jobs take us to sites close to City of London Academy, Whittington Park and The Mother Red Cap pub, among other places. Nearby too are Asanté Academy of Chinese Medicine (1.2 miles north-west) and Vaughan Williams Memorial Library (2 miles south). There’s a railway station in Upper Holloway itself: Upper Holloway station. Well-known places in the area include The Mall Wood Green (2.3 miles north-east) and Royal Northern Hospital (0.5 miles south-east). Green spaces nearby include Dartmouth Park Hill and Parkland Walk.
Your questions answered
Can you take on a job at a hospital such as The Whittington Hospital?
Yes, provided the work is planned with the site’s estates team. Work is phased so departments keep running, under the site’s own rules.
Will you take on work at estates like Bush Industrial Estate, close to Upper Holloway?
Yes, sites like Bush Industrial Estate are within our area, along with the rest of Upper Holloway. Send details of the unit and the work through our quote form for a quick quote.
Can fire-rated sealing at service penetrations be included?
Where it’s specified, yes. We’ll flag if the detail needs a different product.
What hours do you work?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
Can you clear a mastic snag list before handover?
Yes. We clear snags by redoing joints rather than patching them.
How many days will you need on site?
The duration is planned around your programme and the access we are given. We’ll give you an estimate of time on site when we quote.
How do you choose the sealant?
A specification, where there is one, decides it. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
What the job involves on each surface
Snagging before handover
Snags usually come from damage by following trades, missed joints or poor earlier work. We price snagging as part of the package or as a separate visit.
Fire-rated sealant where specified
Fire-rated sealant is one type of fire-stopping product. Collars, wraps, batts and boards are specified for other services, and we’ll tell you if the detail calls for something else. Record requirements are agreed with the quote.
Owners, agents and contractors
Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.
If you look after buildings for someone else, you need clear quotes and clear reporting. You get a fixed quote, an agreed scope and a walk round at the end, plus a 12-month guarantee.
On site: what to expect
Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and work section by section so the rest of the building stays in use. For a job in Upper Holloway, access comes first. Give us the hours we can be on site and we’ll schedule to suit.
- Drawings, the sealant specification and your programme come to us for pricing.
- You receive a fixed quote listing scope, products and phasing.
- Any site paperwork you need (RAMS, insurance certificate, CSCS details) is confirmed with the quote.
- Work follows the programme, area by area, as rooms and elevations become ready.
- Every joint is prepared, set to depth and sealed with the specified product.
- We close out snagging and hand over with a 12-month guarantee.
Getting the site ready
- Send your site hours and access windows
- Tell staff and tenants when we will be in
- Tell us which areas need to stay in use
Getting a fixed quote
To get a fixed quote, call the office on 01277 525 020 or email a schedule or drawings, telling us the site location and the nature of the job. Our quote form is another easy route.
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Leave it or put it right?
It helps to bring the mastic subcontractor in before the package is urgent. We can check joint widths, flag frames with gaps that won’t seal and confirm products against the specification. Called in at the end, the same issues surface during handover. In Upper Holloway, each extra visit means more notices, permits and disruption, so a proper job first time, with the old sealant fully removed, is worth it.
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you will have a fixed figure to work with.
Why choose Mastic Doctor in Upper Holloway
- One contact handling all your sites
- Constructionline member
- Our applicators hold CSCS cards
- Fully insured, including public liability cover
Take a look at what affects the cost and our accreditations and insurance.
What we can’t put right
Honesty saves time and money. Fresh joints won’t solve:
- Oversized gaps that need packing or adjustment by others
- Joint design decisions that belong to the architect or engineer
- Defective windows, doors or glazing units (the supplier or installer’s job)
If you’re not sure, just call 01277 525 020 or email the details over and we will give you a straight answer.
Surfaces we seal
- Window and door perimeters
- Floor and skirting junctions
- Internal decorators’ caulk
- Cladding and panel joints
- Sanitary and kitchen joints
- Brick and block movement joints
What we are called out for in Upper Holloway
Swapping the specified sealant for a cheaper general-purpose product is a common cause of failure. A sealant that isn’t right for the substrate or the movement will fail ahead of time. We use what’s specified, and any substitute goes to you for acceptance.
These are often picked up first by site or facilities staff:
- A mastic package split between trades with no clear owner
- Oversized or tapered gaps around new frames
- Sealant knocked or painted over by other trades
- Old sealant on a refurbishment that needs stripping before new work
Hotels like St George Hotel (0.6 miles north-east of Upper Holloway) rarely close for long, so refurbishment mastic is phased floor by floor.
What to look for in a quote
- Whether primer will be used where the manufacturer specifies it
- Which product they’ll use, and why it suits the joint
- Their public liability cover
- Are they CHAS accredited or on Constructionline?