Primrose Hill construction mastic
Construction mastic in Primrose Hill, backed by over 20 years in commercial sealing. Fully insured, with a 12-month guarantee.
- Inconsistent sealant finishes from plot to plot
- Missed perimeter joints on a new elevation
- Perimeter gaps outside the sealant’s range
Construction mastic for Primrose Hill sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic for commercial buildings in Primrose Hill
Site managers want applicators who turn up with the right cards and paperwork. We’re a Constructionline member and CHAS accredited, and every applicator holds a CSCS card, with public liability insurance in place. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. If you have oversized or tapered gaps around new frames and inconsistent sealant finishes from plot to plot, we can put it right, on cladding and panel joints, floor and skirting junctions and internal decorators’ caulk alike. Whoever orders the work in Primrose Hill, the brief is usually the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
A great deal of London construction is refurbishment of occupied or part-occupied buildings, alongside new blocks. Replacement windows, recladding and fit-outs leave perimeter and facade joints to seal, often next to people still using the building.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Where
- Primrose Hill (NW3, NW1, NW8)
- Wider area
- Greater London
- Cover
- A 12-month guarantee
- Quote
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Updated
- 3 November 2026
Surface by surface
External facade and movement joints
Movement joints in the facade are sealed with a product suited to the expected movement. We set the depth with backing rod to avoid three-sided adhesion.
Internal decorators’ caulk
Caulking is often done in a hurry by whoever’s on site. Done properly, it saves decorators time and gives a clean line and keeps the snag list down.
How a job runs
Site rules come first: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, we take the joints in the sequence agreed with you, and each area is checked before we leave it. Planning a London job such as one in Primrose Hill starts with access. Send the building rules and access times with your enquiry.
- First we look at the scope on site or from drawings.
- You receive a fixed quote covering scope, products and sequence.
- Paperwork is agreed and applicators are inducted on site.
- Sealing follows the programme as areas are released.
- Any frame gaps or issues outside our scope are flagged to the site team.
- Final snagging is completed and the 12-month guarantee applies.
Before we start on site
- Tell us what induction or permit system the site runs
- Send any specification or drawings in advance
- Clear stock, furniture or equipment away from the joints
Request a quote
Send details, get a quote, we seal, guaranteed: that’s how every job runs. The first step is to phone 01277 525 020 or send photos by email with what you know.
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Nearby places to Primrose Hill
What else we do in Primrose Hill
Construction mastic in Primrose Hill: the local picture
As part of Greater London, Primrose Hill is inside the ULEZ, which applies to every van on site. Delivery slots and scarce storage shape how and when the mastic goes in. Primrose Hill has a good number of hotels close by, all within 2 miles. When hotels extend or refit, the work is typically squeezed between peak periods, mastic included.
For contractors at a college like WM College, which lies east of Primrose Hill, perimeters and internal sealant are timed for the holidays. 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.
Primrose Hill is about 1 mile south-east of Hampstead, in Greater London. Primrose Hill sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. We work across 764 places in Greater London.
Postcode districts covered here: NW3, NW1 and NW8. If your site is on Eton Road, Oval Road and Regal Lane or close by, we can quote for mastic packages. Access to Primrose Hill is via the A5205, so getting applicators and materials to site is simple. 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). Further afield, our area takes in 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).
Near you in Primrose Hill
In Primrose Hill, that means premises near Cecil Sharp House, Haverstock School and Regent's Park. Nearby too are St. Mary's Town and Country School (0.5 miles north-west) and Princess of Wales pub (under half a mile east). Primrose Hill’s nearest station is Kentish Town West station, about 0.7 miles north-east. Nearby you will also find Montfichet's Tower (3.1 miles south-east) and Wellington Hospital (0.7 miles south-west). For a walk, there’s Parliament Hill and Adelaide Nature Reserve.
Quoting for work in Primrose Hill
The price varies from site to site. Expect it to depend on:
- Site requirements such as inductions and permits
- Specialist products, such as fire-rated or hygienic sealants
- How much there is to seal
- Whether old sealant has to be cut out first
No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.
What we need to price the job
Whether it’s one area or a whole building, these details speed things up:
- Your programme or deadline
- Drawings or a marked-up plan, if available
- The type of building and who uses it
- Clear photos of the problem areas
If there’s a specification, drawings or a tender package, send it with your enquiry, and we will price the work to it. Smaller jobs need nothing more than photographs and a few notes.
Primrose Hill: questions and answers
Do you work in London buildings with loading restrictions?
Yes. Booked loading bays, goods lifts and permit-to-work systems are normal for London jobs. Say when the building is occupied and when it’s quiet, and we’ll plan accordingly. All of Greater London is inside the ULEZ, and our planning allows for it
Will you plan work around the academic year at somewhere like Regent's University London?
Yes. Education sites normally want the work in vacations or in phases during term, and we plan to suit. Tell us which site documents you need, such as RAMS, our insurance certificate or CSCS details, and they’re confirmed with the quote.
Can you send site paperwork?
Each site asks for different documents, so tell us what you need and we will confirm it when we quote.
How do you deal with asbestos in old sealant?
Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
Can the building stay open while you work?
Yes, as long as we plan it. We agree a sequence with your contact so just one area at a time is disrupted.
Can you seal external joints in wet or cold weather?
Conditions have to suit the product before external work starts. Wet or cold joints cause adhesion problems so it’s better to wait.
When can you be on site?
Mention the site’s hours and access windows in your enquiry, and we’ll plan around them. You can reach the office between 8am and 5pm, Monday to Friday.
Leave it or put it right?
A cheaper sealant can look like an easy saving on a large package. The saving is small next to the cost of callbacks and defects, especially externally. Where an alternative is genuinely suitable, we will say so. Failed sealant in a building in Primrose Hill can quickly affect neighbours, tenants or the floor below: water travels through shared structures, and a small leak becomes a dispute between occupiers. Dealing with it early is simpler for everyone.
Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.
What you get with us
- Our applicators hold CSCS cards
- Fully insured, including public liability cover
- Colours confirmed for the specified product
- CHAS accredited contractor
Take a look at our cost guide or our accreditations.
Keeping the joints sound
Cleaning and maintenance staff play a part too. Pass these on to them:
- Stick to the specified sealant rather than a generic substitute
- Brief the final clean team to avoid blades near sealant
- Note which sealant went where at handover
- Ask for joint and product checks before the package is urgent
Once an area is sealed, protect it from following trades. Fresh sealant needs its cure time before it’s cleaned, painted near or knocked; we confirm the time for each product.
External joints sealed in poor weather are a common cause of early failure. Waiting for a dry joint and the right temperature is better than redoing work so external sequencing builds in some flexibility.
When to call us in Primrose Hill
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.
Things that typically lead to an enquiry:
- Window and door perimeters that won’t pass inspection
- Inconsistent sealant finishes from plot to plot
- Oversized or tapered gaps around new frames
- Caulk cracking where joints are moving more than expected
On a campus such as Regent's University London, which lies south of Primrose Hill, new teaching buildings and residences are normally built and refurbished around the academic year.
What your quote should include
- Is the sealant right for the movement and the substrate?
- Whether primer will be used where the manufacturer specifies it
- How they’ll work around occupants
- How joint depth will be controlled