The Mastic Doctor team standing beside their branded vans outside an office building
Greater London · England

Primrose Hill facade sealing

Our CSCS-carded applicators take on facade joint and window perimeter sealing on commercial buildings in Primrose Hill and the surrounding area. Send photographs or drawings for a fixed quote.

  • Air leaks through failed facade joints
  • Weathered joints at frame-to-structure perimeters
  • Damp patches beside frames after rain
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Facade sealing across Primrose Hill

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

When to bring in a specialist

Redoing a failed joint typically costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

About our facade sealing in Primrose Hill

Every facade quote starts with how the joints will be reached. Tell us about access: whether scaffold is already up, what the client is arranging, and any restrictions on the site, so the price covers the real job. We work on stone and brick facade joints, shopfront frames and cladding panel joints, and what we are called in for most is gaps between rainscreen or cladding panels and staining on stone next to old sealant. A single leaking joint is often how a building in Primrose Hill first comes to us: we look at the rest while we are there and tell you what we find.

Building sites in London tend to be tight: small compounds, delivery slots and shared hoists and scaffold. Mastic is usually one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.

Our 12-month guarantee is about workmanship, not wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we’re clear about what is covered before work starts.

Where
Primrose Hill (NW3, NW1, NW8)
Wider area
Greater London
Guarantee
A 12-month guarantee
Price
Fixed quote, scope in writing
Call
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

How a job runs

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. Once we’re cleared to begin, the joints are worked through in the order agreed with your site contact, and each area is checked before we leave it. In Primrose Hill, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. Access, site rules and timing are settled with the client up front.
  2. Weather and temperature are checked against the product’s limits.
  3. Each joint is cut out and the edges inspected.
  4. Joints are cleaned, primed if required and fitted with backing rod.
  5. Facade-grade sealant goes in and is tooled to a tidy concave profile.
  6. We hand over with our 12-month workmanship guarantee.

Preparing the site

  • Send any specification or drawings in advance
  • Explain the parking and delivery arrangements
  • Let us know about inductions and permits

Ask for a quote

Send us photographs, drawings or a joint schedule and a fixed quote comes back to you. If the job needs a look first, we’ll arrange a site visit.

Get a price

Related advice

Different surfaces, different methods

Brick and stone facades

Stone can absorb plasticisers from the wrong sealant. The specified stone-compatible sealant is what we use, and mask the edges carefully.

Precast concrete panels

Concrete edges can be dusty or weak. We clean back to sound material and flag edges that need repair.

When it isn’t the sealant

Being straight saves everyone time. Fresh joints won’t solve:

  • Joints whose design needs changing by the specifier
  • Cracked or spalling substrates that need repair before sealing
  • Replacing glass or failed glazing units

If in doubt, speak to us on 01277 525 020 or email drawings and photos and we will say what we think.

Joints and surfaces we work on

  • Cladding panel joints
  • Stone and brick facade joints
  • Coping and flashing joints
  • Perimeter joints where frames meet the structure
  • Window and door perimeters
  • Shopfront frames

Your questions answered

Can you work on a hospital site such as Hospital of St John and St Elizabeth?

Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.

Can work at a site such as Regent's University London fit around teaching?

Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Can you handle several sites?

Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.

Will rain stop the work?

Wet joints or temperatures outside the product’s range mean waiting. The programme allows for it and we tell you if the forecast changes things.

When is resealing likely to be due?

Nobody can honestly give a figure in years, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

When can the area be used after sealing?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

Are you fully insured?

Yes. We’re fully insured, and the certificate can go with your quote.

Building owners, agents and FMs in Primrose Hill

We work for building owners and managing agents on everything from one building to a spread of sites around Primrose Hill. Several sites can go on one quote, which keeps the paperwork simple.

Hotels, schools, healthcare sites, offices and retail units book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

Facade sealing in Primrose Hill: the local picture

The ULEZ covers the whole of Greater London, Primrose Hill included, so site vehicles need to meet its standards or pay the daily charge. London sites also mean booked deliveries and limited storage, which the mastic programme has to allow for. There are plenty of hotels within about 2 miles of Primrose Hill. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included.

On a campus such as Regent's University London, 1 mile south of Primrose Hill, new teaching buildings and residences are typically built and refurbished around the academic year. New units and refits on sites such as Regis Road Business Park (1 mile north-east of Primrose Hill) need their panel and perimeter joints sealed to the specification. Hotel extensions and refits, at places such as Queen's Hotel, under half a mile east of Primrose Hill, usually run between busy periods, so the sealing is squeezed into short windows.

Primrose Hill is about 1 mile south-east of Hampstead, in Greater London. Businesses, contractors and managing agents in Primrose Hill can call on us for facade joints. Primrose Hill is one of 764 places in Greater London on our list.

We take on facade joints across the NW3, NW1 and NW8 postcode area. Streets here include Eton Road, Oval Road and Regal Lane, and sites on any of them can send details for a fixed quote. Access to Primrose Hill is via the A5205 among other routes. Nearby places we also cover include Haverstock (1 mile north), Belsize Park (1 mile north), Chalk Farm (1 mile north-east), South Hampstead (1 mile west) and Swiss Cottage (1 mile west). Nearby towns on our patch include London (4 miles south-east), Kensington (3 miles south-west), Shoreditch (4 miles east), Walthamstow (7 miles north-east), Hoxton (3 miles east) and Whitechapel (4 miles south-east).

Local landmarks in Primrose Hill

Recent enquiries here include premises near Cecil Sharp House, Haverstock School and Regent's Park and the streets around them. Other local landmarks include St. Mary's Town and Country School (0.5 miles north-west) and Princess of Wales pub (under half a mile east). For rail, the closest station is Kentish Town West station, about 0.7 miles north-east. Well-known places in the area include Montfichet's Tower (3.1 miles south-east) and Wellington Hospital (0.7 miles south-west). Green spaces nearby include Parliament Hill and Adelaide Nature Reserve.

Map of Primrose Hill © OpenStreetMap contributors

Quoting for work in Primrose Hill

Your fixed quote is built from the real scope. It takes account of:

  • Specialist products, such as fire-rated or hygienic sealants
  • Distance, for remote addresses
  • Whether the work must be split into stages
  • Induction, permit and paperwork requirements

There’s no price list, because the scope varies so much from one building to the next. Call for a quote.

What we need to price the job

Whether it’s one area or a whole building, these details speed things up:

  • The asbestos register, for older buildings
  • Where the site is, with the postcode
  • Photos of the joints, close up and from further back
  • Rough lengths or quantities, or drawings if you have them

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, speak to us on 01277 525 020 or email a schedule or drawings.

Accreditations

Trusted. Accredited. Insured.