Expansion and movement joint sealing in Charlton, Hertfordshire
Planning work on a movement joint in Charlton? We assess it, carry out the work and guarantee our workmanship for 12 months.
- New sealant over old, now failing
- Joints where the bead has lost adhesion
- Debris jammed in movement joints
Expansion joint sealing for Charlton sites
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
On site: what to expect
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact. Rural sites near Charlton may need directions, gate codes or a contact on site. Add it to your enquiry and we’ll build it into the plan.
- We start with photos, approximate lengths and any drawings, visiting where needed.
- We compare each joint’s width with the movement and the sealant’s capability, and flag anything that needs an engineer.
- Old sealant and debris are cut out of every joint.
- Any broken arrises or friable edges are flagged before work goes further.
- A sealant suited to the movement and traffic is laid to depth and tooled.
- Areas reopen once cured, and the work carries our 12-month guarantee.
Getting the site ready
- Send your site hours and access windows
- Explain the parking and delivery arrangements
- Send asbestos survey details if the building is pre-2000
Request a quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.
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Expansion joint sealing for commercial buildings in Charlton
If you need expansion joint sealing in Charlton, start with photos and joint lengths. We’ll come and look where photographs don’t show enough, then send a fixed quote that names the sealant. To discuss the joints first, speak to us on 01277 525 020 or email us. If you’re dealing with spalled or broken joint edges in floors and decks and new sealant over old, now failing, we can put it right. Whether you call it commercial sealant work, mastic application or joint sealing, in Charlton it comes down to the same thing: the right product in a properly prepared joint.
In and around smaller places like Charlton, the concrete floors we see are often in converted farm buildings, small workshops and storage units. Joints in those slabs take vehicles, trolleys and foot traffic, and need a filler or sealant to match.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If our installation lets you down in that time, we return and fix it.
- Where
- Charlton (SG5)
- Wider area
- Hertfordshire
- Cover
- A 12-month guarantee
- Price
- A fixed quote before we start
- Telephone
- 01277 525 020
- Updated
- 3 November 2026
How the job changes by surface
Podium joints
On podiums, the joint can belong to a larger waterproofing detail. We reseal the joint where sealant is the specified fix, and tell you if the problem looks like the waterproofing below.
Brickwork and blockwork joints
A brick movement joint full of old mortar or debris can’t close. Everything is raked out before backing and sealant go in, and tell you if the joint looks too narrow for the movement.
Slabs, ramps and loading bays in Charlton
Charlton is in the South East, one of the UK’s drier regions. Outside joints in yards and car parks still have to be dry before sealing, and winter de-icing salt on car parks and ramps works into any open joint. At about 31 miles from central London, Charlton is within reach of the capital. Warehousing clusters around the motorways that ring and radiate from London; their floors carry heavy traffic every shift.
Hospital campuses such as Pinehill Hospital (1.3 miles north-east of Charlton) grow in stages, leaving movement joints wherever new blocks meet old.
Charlton is about 1 mile south-west of Hitchin, in Hertfordshire. We send applicators to Charlton for movement joints, handled exactly as we handle every other area. Our Hertfordshire coverage takes in 371 places, large and small. London is covered too, around 31 miles from Charlton.
Commercial sites across SG5 are covered. Just outside Charlton, we also work in Gosmore (1 mile south-east), Hitchin (1 mile north-east), Benslow (1 mile north-east), Bearton (1 mile north) and Westmill (1 mile north). Nearby towns on our patch include Hemel Hempstead (15 miles south-west), Stevenage (5 miles south-east), St Albans (13 miles south), Welwyn Garden City (11 miles south), Harpenden (9 miles south) and Hatfield (12 miles south).
What’s near Charlton
Locally, jobs take us to sites close to Hitchin Boys' School, The Three Moorhens Public House and Kingshott School. The closest station to Charlton is Hitchin station, roughly 1.4 miles north-east. Nearby you will also find North Hertfordshire Museum (0.8 miles north-east) and Lister Hospital (3.3 miles east). For a walk, there’s Markham's Hill and Oughtonhead Nature Reserve.
Questions about Charlton
Do we have to stop operations in Charlton while the joints are sealed?
Typically not: we work in sections and hand each one back once it has cured. The phasing plan comes with the quote.
Can you work on a hospital site such as Pinehill Hospital?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
What happens if it rains on the day?
Sealing onto a damp surface leads to adhesion failure so we’d rather rearrange than seal in the rain. The work is simply moved to the next suitable day.
Are you fully insured?
Yes. We’re fully insured, and the certificate can go with your quote.
Is Charlton in your area?
Yes. We cover Charlton and the rest of Hertfordshire, within our coverage of Greater London, South East England and Scotland. To discuss a job, call 01277 525 020 or email the details over.
Can you fit around our working hours?
The office is staffed Monday to Friday, from 8am until 5pm. Tell us your site hours and access windows and the work will be fitted around them.
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 need expansion joint sealing in Charlton?
Some joints were never sealed with the right product. Products not classed for the movement fail early. Movement capability is set out in BS EN ISO 11600.
Clients normally get in touch after noticing one or more of the following:
- Layers of sealant in a movement joint
- Weathered movement joint sealant that no longer flexes
- Joints where the bead has lost adhesion
- Expansion joints filled with dirt and stones
Schools like Highbury Infant School and Nursery often have long brick elevations with movement joints that age quietly.
What your quote should include
- Who will actually carry out the work
- How long is the guarantee, and what does it include?
- Are they CHAS accredited or on Constructionline?
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
Also in Charlton
General trades versus a specialist
Redoing a failed joint usually costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.
What we can’t put right
A few problems need another trade or a different fix, and we point that out rather than sealing over them:
- Waterproofing layers buried beneath the sealant
- Structural movement beyond what the joints were designed for (that needs a structural engineer)
- Damaged metal nosings or cover plates over a joint
If you’re not sure, just call the office on 01277 525 020 or use the quote form and we’ll give you a straight answer.
Where we work in Charlton
- Brickwork movement joints
- Blockwork control joints
- Podiums and floor movement joints
- Precast concrete panel joints
- Car park decks and ramps
- Cladding panel joints
Leave it or put it right?
Sealing over a failed movement joint is a common shortcut. A bead laid on top of the failed one neither grips nor flexes properly. We cut out the old seal and prepare the faces every time. Around Charlton, it’s better to renew all the failing joints at once, rather than one at a time. Photos of every joint help us quote for the whole job.
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
What you get with us
- 12-month guarantee on workmanship
- Fully insured, including public liability cover
- Clear, fixed quotes
- Colour agreed before work starts
See how commercial sealant jobs are priced or our accreditations.