Expansion and movement joint sealing in Green Street, Hertfordshire
Expansion and movement joint sealing in walls, decks and floors in Green Street. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Sealant peeling off one face of the joint
- Weathered movement joint sealant that no longer flexes
- Rain penetration at brick or block movement joints
Expansion joint sealing near Green Street
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
About our expansion joint sealing in Green Street
Joints in car park decks and ramps are among the hardest-working in any building. Wheel loads, grit and de-icing salts attack the seal and the concrete either side, so failed seals soon lead to leaks onto the level below and broken edges. A sealant suited to traffic and the expected movement goes in and the work can be phased so parts of the car park stay open. If you’re dealing with joints where the bead has lost adhesion and car park joints leaking onto vehicles below, we can help, on precast concrete panel joints, car park decks and ramps and blockwork control joints alike. For commercial sealant work in Green Street, you deal with one contact from quote to sign-off, whether it’s one building or several.
For a site near Green Street, measurements and photos up front mean one trip where possible. Note joint widths and the traffic that uses them, and we’ll take it from there.
Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.
- Where
- Green Street (WD6)
- Region
- Hertfordshire
- Guarantee
- 12 months on every job
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in Green Street
Agents, factors and owners’ representatives all follow the same route: send details, get a fixed quote, we seal, guaranteed. We can agree access arrangements and keyholder contacts beforehand.
Building owners and managing agents use us on everything from one building to a spread of sites. One quote can cover more than one site, which keeps the paperwork simple.
Our process
We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. With the paperwork done, we take the joints in the sequence agreed with you. If others near Green Street need work, visits can be combined. You will have a fixed quote before work starts.
- The first job is to check each joint: how wide it is, how it moves and why the old seal let go.
- You get a fixed quote with the product and its movement capability stated.
- We strip out the old seal and prepare the faces.
- Closed-cell backing rod is set to depth, or bond-breaker tape in shallow joints.
- Primer goes on where the manufacturer specifies it, followed by the sealant, which is then tooled off.
- We check every joint before sign-off, and the work carries our 12-month guarantee.
Before we start on site
- Arrange parking or a loading space
- Send any specification or drawings in advance
- Warn occupants and staff about the work
Quotes
Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to call the office on 01277 525 020 or email drawings and photos.
Related advice
What affects the price in Green Street
There’s no standard rate for sealant work, since sites vary so much. What we take into account:
- Distance, for remote addresses
- Whether the work must be split into stages
- Removal of failed or old sealant
- How accessible the joints are
Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote and we will explain how it’s made up.
Details that help us quote
A good diagnosis starts with the right details. Tell us:
- Whether the building will be occupied during the work
- The asbestos register, for older buildings
- Your programme or deadline
- Specification clauses that apply
Need a figure for a tender or a budget? We will quote against your scope and drawings you can plan around. For a chat about it beforehand, give us a call on 01277 525 020 or email us.
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. Tell us what has to stay open and we’ll plan around it. Around Green Street, it’s better to renew all the failing joints at once, rather than one at a time. Send photos of each area and we will quote for the lot.
Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. Send the details and a fixed figure follows.
What you get with us
- Products installed to the manufacturer’s instructions
- A range of standard colours, depending on the product
- Sealing commercial buildings since 2005
- Fully insured
Take a look at our cost guide and how we’re accredited.
Expansion joint sealing in Green Street: the local picture
Green Street is about 14 miles from central London. Distribution warehouses and industrial estates are common around the motorway corridors that serve the capital, and their floor joints take forklift and pallet-truck traffic all day. Green Street sits in one of the drier corners of the country, the South East. External slab and deck joints still need a dry, clean joint to seal, and where de-icing salt is spread in winter, open joints let it in.
For a school such as Parkside Community Primary School, playground and building joints can be done in the holidays. Another example is Borehamwood Shopping Park, 1.3 miles south of Green Street, where floors and yards would be done in stages around the occupiers. A healthcare site such as Kingsley Green Hospital (to the north-west of Green Street) depends on car parks, ramps and service yards whose joints take traffic all day.
Green Street is about 1 mile north of Borehamwood, in Hertfordshire. Businesses, contractors and managing agents in Green Street use us for work on movement joints, as part of our coverage of Hertfordshire. Our Hertfordshire coverage takes in 371 places, large and small. There’s a separate page for London, roughly 14 miles from Green Street.
Business premises anywhere in WD6 are within our area. Buildings on Stapleton Road, Green Street and Cowley Hill are within our area. Just outside Green Street, we also work in Well End (1 mile south-east), Borehamwood (1 mile south), Shenley (1 mile north-west), Ridge (2 miles north-east) and Rowley Green (2 miles south-east). Further afield, our area takes in Watford (5 miles west), Hemel Hempstead (10 miles north-west), St Albans (6 miles north-west), Welwyn Garden City (9 miles north), Harpenden (10 miles north) and Hoddesdon (12 miles north-east).
Local landmarks in Green Street
We work on buildings around The White Horse Public House and Hertswood Academy, among other places. The closest station to Green Street is Elstree & Borehamwood station, about 1.6 miles south. Other landmarks nearby include Hilfield Castle (3 miles south-west) and Shenley Hospital (1.6 miles north-west). For a walk, there’s Darland's Lake and Arkley Lane and Pastures.
Nearby places to Green Street
More services for Green Street
What the job involves on each surface
Joints between different materials
Different materials meeting at a joint rarely move in step. The product must bond to both substrates and cope with the movement.
Car park decks and ramps
Car park joints are some of the hardest-working joints in any building. We use a sealant made for wheel loads and the expected movement with bays done in phases so the car park keeps running.
Your questions answered
Is a hospital such as Kingsley Green Hospital somewhere you can work?
Yes. We work in healthcare settings as well as offices and schools. Work is phased so departments keep running, under the site’s own rules.
Is Green Street off your patch?
No. Small places get the same service as large ones. We cover Greater London and the counties of the South East. Good photographs up front let us bring everything on the first visit.
What guarantee do you give on joint sealing?
The workmanship is guaranteed for 12 months from sign-off, and we are fully insured for public liability. Keeping joints clear of debris helps them last.
Does weather matter for sealant work?
It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.
Can the sealant be colour-matched?
It depends on the product. Some ranges are wide, others limited, so we will confirm the colours available for the specified product with the quote.
How long will the new sealant last?
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.
What exactly is a movement joint?
The general name is movement joint, and expansion joint is one common type. On site, people tend to use them interchangeably, and the sealing method is much the same.
Maintenance after handover
After handover, a little attention goes a long way:
- Inspect exposed joints once the cold weather has passed
- Act on the first tear or lifting edge rather than waiting
- Record the sealant used and the date in the O&M file
- Brief car park operatives to protect joint lines during winter clearance
On car parks, winter clearance can damage deck joint sealant. Lifting the blade at each joint avoids tearing the bead.
Joints sealed at the same time generally fail around the same time. It pays to check every joint, not just the obvious one, so the work can be planned rather than rushed. We will tell you which movement joints need doing now and which can wait.