Expansion Joint Sealing in Pinner
Expansion and movement joint sealing in walls, decks and floors in Pinner. CHAS accredited and fully insured, with a 12-month guarantee.
- New sealant over old, now failing
- Joints packed with grit and debris
- Torn sealant in brick or block movement joints
Expansion joint sealing across Pinner
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
When something else is needed
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Movement on a scale no sealant is meant to absorb
- Joints too narrow for the movement, which need redesigning by the engineer
- Crumbling edges that would give a new bead nothing sound to grip
If in doubt, call the office on 01277 525 020 or email a schedule or drawings and we will say what we think before you book.
Where we work in Pinner
- Brickwork movement joints
- Car park decks and ramps
- Cladding panel joints
- Podiums and floor movement joints
- Precast concrete panel joints
- Blockwork control joints
Expansion joint sealing in Pinner, done properly
Mastic Doctor has sealed movement joints since 2005. Our applicators are CSCS-carded, we are CHAS accredited and a Constructionline member, and we carry five million pounds of public liability insurance. Workmanship is backed by our 12-month guarantee. We work on blockwork control joints, cladding panel joints and precast concrete panel joints, and the failures we are asked to look at most are sealant peeling off one face of the joint and arrises breaking up along floor joints. Most enquiries from Pinner start with one failed joint and grow into a wider look at the building: we look at the rest while we are there and tell you what we find.
London’s floor joints are concentrated in warehouses and trade units, car parks, podiums and decks. Planning a job in Pinner means thinking about access, loading times and the ULEZ as well as the joints.
Every job is signed off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Place
- Pinner (HA5)
- Region
- Greater London
- Guarantee
- 12 months on every job
- Price
- A fixed quote before we start
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Why deal with it now?
On a car park, resealing joints in phases keeps the deck open. Phased work by bay or zone lets the rest stay in use, compared with a full closure. We agree phasing with you before work starts. In Pinner, each extra visit means more notices, permits and disruption, so a proper job first time, with the old sealant fully removed, is worth it.
What a job costs comes down to the quantity of joints, what has to come out first and the access. Call for a fixed quote when you are ready.
Why appoint us
- CHAS accredited contractor
- One contact handling all your sites
- Colours confirmed for the specified product
- Public liability insurance in place
Take a look at how commercial sealant jobs are priced and our accreditations.
Diagnose, treat, sign off
The first thing on site is a walk round with your contact, to confirm the scope, the order of work and any areas we must keep clear. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. In Pinner, most buildings stay in use during the work, so zones and timings are agreed with whoever manages the building. Phased work keeps the rest of the building in use.
- First the joints are inspected, widths measured and the type of failure noted.
- You receive a fixed quote stating the product and the movement it is rated for.
- Phasing is agreed so decks, floors or entrances can stay in use where needed.
- We strip the old sealant or filler and prepare each face until it’s sound and dry.
- Depth is controlled with backing, the faces are primed where the maker calls for it, then the bead is laid and tooled.
- We check each joint with you, confirm the cure time and sign off under our 12-month guarantee.
What we need from you
- Arrange parking or a loading space
- Send your site hours and access windows
- Let us know about inductions and permits
Quotes
Pricing a project or setting a maintenance budget? We’ll quote against your scope and drawings that you can work with. If you have questions first, call the office on 01277 525 020 or email us.
Related advice
What sets the cost
Quotes vary with the job. It mainly depends on:
- Which sealant the job calls for
- Whether old sealant has to be cut out first
- The total length or number of joints
- Phasing around occupants
Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.
What we need to price the job
A few photographs plus some basic facts will normally do. Please tell us:
- What the building is and how it’s used
- The asbestos register, for older buildings
- Anything awkward about access or site hours
- The site address and postcode
Send us photographs, drawings or a joint schedule are often enough for a fixed quote. Where a site visit makes more sense, we will arrange one.
Towns and villages near Pinner
What else we do in Pinner
Slabs, ramps and loading bays in Pinner
London car parks, loading bays and podium decks often can’t close for long, so we seal in sections and hand areas back as each cures. Pinner has at least three named business or industrial parks inside a 3-mile radius. Floors, loading bays and yards on sites like these are where floor and movement joints work hardest.
University campuses such as Westminster University (3.1 miles east of Pinner) have car parks, paved walkways and building elevations with movement joints. Phasing is what makes joint work possible on busy sites such as Harrovian Business Village (2.3 miles south-east of Pinner): one bay, aisle or car park row at a time.
Pinner is about 1 mile north-east of Ruislip, in Greater London. Looking for expansion joint sealing in Pinner? We can help, as we do across Greater London. 764 places across Greater London fall within our area, Pinner among them. London is covered too, around 14 miles from Pinner.
Work on movement joints is covered throughout HA5, for business premises of every kind. Streets here include Love Lane, Tudor Road and Marsh Road, and sites on any of them can send details for a fixed quote. Just outside Pinner, we also work in 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). Nearby towns on our patch include 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, among other places. For rail, the closest station is Hatch End station, roughly 1.4 miles north-east. 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). For a walk, there’s Horse Shoe Bay and Northala Fields.
How the job changes by surface
Joints between different materials
Some mixed-material joints suit a hybrid sealant. We pick the product for the materials and the movement, and confirm it in the quote.
Car park decks and ramps
Water coming through deck joints is the usual first sign. The old seal comes out, the edges are prepared and the joint resealed, and we’ll tell you if any edges need repairing first.
Common problems we fix in Pinner
Weathering wears down sealant on exposed elevations and decks. In time the bead chalks, stiffens and cracks and opens at the next temperature swing.
If one of these sounds familiar, it’s time for a closer look:
- Rain penetration at brick or block movement joints
- Hardened, cracked sealant on exposed facades
- Expansion joints filled with dirt and stones
- Sealant pulling off the joint face
Estates like Waverley Industrial Park (2 miles east of Pinner) combine warehouse slabs, yards and loading bays, all with joints under wheels.
What your quote should include
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- How the joint faces will be prepared and primed
- How they handle RAMS and site documents
- Health and safety accreditation such as CHAS
Your questions answered
Do you take on work at healthcare sites like Cygnet Hospital?
Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.
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. Share the building’s contractor rules and we will work to them. The ULEZ covers the whole of Greater London, which we allow for
Can staff carry on working while you are here?
Yes, as long as we plan it. Tell us your site hours and access windows and we’ll plan around them.
Can you follow the specification on our project?
Yes. We follow the specification, along with the manufacturer’s installation guidance, and we raise anything unclear before work begins.
What exactly is a movement joint?
It’s a deliberate gap that lets the structure move without cracking. Expansion joint is a name often used for the same thing, and either way it needs a sound seal.
Is colour matching possible?
That depends on the product. Some ranges offer many colours, others very few, so we will confirm the colours available for the specified product with the quote.
Do you need to see the site first?
Many jobs can be quoted from photos, drawings or a joint schedule. If the job needs a look first, we’ll arrange a visit before quoting.