Construction and new-build mastic in Pinner, Greater London
We carry out mastic packages for new-build and refurbishment projects in Pinner and the surrounding area. Send photographs or drawings for a fixed quote.
- A mastic package split between trades with no clear owner
- A long mastic snag list close to completion
- Old sealant on a refurbishment that needs stripping before new work
Construction mastic near Pinner
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Construction mastic in Pinner, done properly
Getting a subcontractor through site induction should be simple. We’re a Constructionline member and CHAS accredited, and every applicator holds a CSCS card, and we are fully insured. RAMS, an insurance certificate and CSCS details can be confirmed with the quote if you tell us what you need. The enquiries we see most involve mastic snags holding up handover and existing joints on a refurb that need cutting out and resealing, on cladding and panel joints, floor and skirting junctions and window and door perimeters. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Pinner, preparation and product choice get the time they need.
Building sites in London tend to be tight: small compounds, delivery slots and shared hoists and scaffold. Mastic is typically one of the last trades on each elevation or floor, so we keep to the programme and the order of trades the site sets.
Building owners and contractors get the same cover: twelve months on the work we carried out. Faults in the structure, damage and other trades’ work fall outside it, and we say so plainly.
- Location
- Pinner (HA5)
- Wider area
- Greater London
- Guarantee
- 12 months on our workmanship
- Price
- A fixed quote before we start
- Phone
- 01277 525 020
- Updated
- 3 November 2026
Diagnose, treat, sign off
Tell us your site hours and access windows and we’ll plan around them. On the day, the work area is kept contained and tidy, and we check in with your contact before moving on to each new area. All of Greater London is in the ULEZ, and kerbside space in Pinner can be scarce. Let us know about any on-site parking or loading arrangements when you send the job details.
- We start with the drawings, specification and programme.
- We take off quantities and return a fixed quote.
- We agree with the site team which areas come first.
- Each area is sealed when it’s released.
- Joints are prepared, backed and sealed to the specification.
- After snagging, the work is handed over under our 12-month guarantee.
Before we start on site
- Have the specification and drawings to hand
- Point out any areas we must not close
- Clear stock, furniture or equipment away from the joints
Ask for a quote
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To ask for one, give us a call on 01277 525 020 or send details through our quote form.
Related advice
Common questions from Pinner clients
Can you cope with the access rules in a London building?
Yes. Inductions, permits and timed loading are routine for us in London. Send the building rules and access times with your enquiry. All of Greater London is inside the ULEZ, and our planning allows for it
Do you cover business parks and estates near Pinner, such as Waverley Industrial Park?
Yes, sites like Waverley Industrial Park are within our area, along with the rest of Pinner. To start, just ring 01277 525 020 or email the details over with the unit, the joints involved and your access times.
How long does a job like this take?
It depends on the scope, though a typical visit typically takes a day or two on a small fit-out and several weeks on a large multi-storey package. For bigger or phased jobs, we will set out a timescale with the quote.
How do you deal with asbestos in old sealant?
The duty to manage asbestos sits with the building’s dutyholder, so we will ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.
How do you choose the sealant?
The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Do you cover Pinner?
Yes. We cover Pinner, within our coverage of Greater London, South East England and Scotland. For a quote, call 01277 525 020 or email us.
What else we do in Pinner
Cost factors for mastic packages
These are the things that shape the price:
- Travel to remote or island sites
- Whether old sealant has to be cut out first
- The size and state of each joint
- The product specified
Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Tell us how the joints are reached and call for a quote.
What we need to price the job
A few photographs plus some basic facts will normally do. It helps to include:
- When you need the work done
- The type of building and who uses it
- The postcode of the building
- A wide shot and a close-up of the area
Tell us about the building, the joints and when you need the work done, and we’ll put a fixed quote together. The easiest way is to phone 01277 525 020 or email a schedule or drawings.
When something else is needed
Sealant solves a lot, but not everything, and we’re upfront when that’s the case. These need a different solution:
- Approving fire stopping as compliant
- Glazing units that are cracked or misted
- Frames fitted out of tolerance
Not sure which it is? You can speak to us on 01277 525 020 or email us and we’ll tell you honestly before you book.
Surfaces we seal
- Sanitary and kitchen joints
- Floor and skirting junctions
- Brick and block movement joints
- Window and door perimeters
- Internal decorators’ caulk
- Cladding and panel joints
Maintenance after handover
Keep the joints in good shape with a few simple steps:
- Note which sealant went where at handover
- Release areas for mastic once other trades have finished in them
- Ask for joint and product checks before the package is urgent
- Plan external elevations with the weather in mind
Tell the builders’ clean team which areas have new sealant. Scrapers used on frames and worktops can nick or lift a new bead so keep them off the joints.
Frames with gaps too wide for sealant need sorting before the mastic goes on. Sealant stretched over an oversized gap won’t last. We raise them during our first walk of the area.
Contractors’ notes for Pinner
Every borough of Greater London is inside the ULEZ, and that applies to contractors’ vehicles on any job in Pinner. Delivery slots and scarce storage shape how and when the mastic goes in.
For contractors on a campus like Westminster University, which lies east of Pinner, facade and perimeter sealing has to fit around students and term dates. Further education sites such as Christ the Redeemer College (1.4 miles south-east of Pinner) are extended and refurbished from time to time, with mastic often programmed into the summer break. Units on estates such as Waverley Industrial Park (to the east of Pinner) tend to be reclad and refitted as tenants change, and each job leaves cladding and perimeter joints to seal.
Pinner is about 1 mile north-east of Ruislip, in Greater London. Looking for construction mastic in Pinner? We can help, as we do across Greater London. Pinner is one of 764 places we cover in Greater London for mastic packages. London is covered too, around 14 miles from Pinner.
Anyone looking for construction mastic in HA5 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. Buildings on Love Lane, Tudor Road and Marsh Road are within our area. Nearby places we also cover include Pinner Green (1 mile north-west), Eastcote (1 mile south), North Harrow (1 mile south-east), Roxbourne (1 mile south) and Rayners Lane (2 miles south-east) for mastic packages. Further afield, our area takes in London (14 miles south-east), City of Westminster (12 miles south-east), Marylebone (12 miles south-east), Kensington (10 miles south-east), St Pancras (13 miles east) and Shoreditch (14 miles east).
Near you in Pinner
Locally, jobs take us to sites close to Pinner High School, Heathfield School and The Oddfellows Arms and the streets around them. The closest station to Pinner is Hatch End station, about 1.4 miles north-east of the centre. A little further out are Northwood and Pinner Cottage Hospital (1.3 miles north-west) and St. George's Shopping Centre (2.3 miles east). Open spaces near Pinner include Horse Shoe Bay and Northala Fields.
How the job changes by surface
External facade and movement joints
Many facade substrates need a primer before sealing. Primer goes on where the sealant maker calls for it and work only when conditions suit.
Window and door perimeters
Frames sealed into the opening keep rain out of the reveal. We use the specified perimeter sealant, typically a low-modulus neutral-cure silicone, with backing rod in deeper gaps.
Should maintenance staff do it?
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.
Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.