The Mastic Doctor team standing beside their branded vans outside an office building
Hertfordshire · England

Expansion Joint Sealing in High Wych

Commercial sealant work in High Wych for contractors, FMs and building owners: expansion and movement joint sealing in walls, decks and floors, with a fixed quote first.

  • Sealant pulling off the joint face
  • Damp inside where a wall movement joint has failed
  • Hardened, cracked sealant on exposed facades
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS accredited
£5m PL insurance

Expansion joint sealing near High Wych

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

How we handle expansion joint sealing in High Wych

Internal floor joints take trolleys, pallet trucks and forklifts. Without a sound filler, joint edges chip and spall under load so the product has to suit both the traffic and the movement. We’ll tell you if the edges need repairing before sealing. We work on blockwork control joints, brickwork movement joints and precast concrete panel joints, and the usual reasons a site gets in touch are movement joints with split or torn sealant and rain penetration at brick or block movement joints. Looking for mastic applicators who cover High Wych? We’ve been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.

Smaller community and commercial buildings around High Wych have their own movement joints in walls and floors. They’re easily forgotten until water gets in or an edge breaks.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

Place
High Wych (CM21)
Region
Hertfordshire
Cover
12 months on every job
Quote
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Aftercare for building managers

After handover, these steps help:

  • Clear dirt from joint lines during routine cleaning
  • Raise snow-clearing blades over deck joints where possible
  • Leave barriers in place until fresh joint sealant has cured
  • Record the sealant used and the date in the O&M file

Every joint we seal is backed by a 12-month guarantee on workmanship. Record which product went into which joints in the building file so future maintenance isn’t guesswork.

When one joint fails, others of the same age are rarely far behind. Inspecting the whole run is worth the effort so you can prioritise and budget. We can suggest an order, worst joints first.

Owners, agents and contractors

Building owners and managing agents use us on everything from one building to a spread of sites around High Wych. One quote can cover more than one site, which keeps the paperwork simple.

Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

Why deal with it now?

Closing a car park for a reseal is rarely an option. 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. One visit to deal with every failing joint makes more sense than several trips to a place like High Wych, rather than one at a time. Photos of every joint help us quote for the whole job.

What a job costs comes down to how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a quote once you have the details.

Why appoint us

  • Over 20 years of commercial sealing
  • Constructionline member for supplier checks
  • 12 months’ guarantee on every job
  • Work to your specification and the manufacturer’s guidance

Read what affects the cost or our accreditations and insurance.

Where floor joints take the most wear near High Wych

Less than 3 miles from High Wych there are at least three named estates and business parks. That puts plenty of warehouse floors, service yards and car parks close by, all with joints under traffic. High Wych is about 23 miles from central London. Distribution warehouses and industrial estates are common around the motorway corridors that serve the capital; their floors carry heavy traffic every shift.

For a centre such as Harlow Retail Park, 1.7 miles south of High Wych, the service yard and car park joints usually need attention first. Sites like Rivers Hospital, 0.6 miles east of High Wych, carry ambulances, deliveries and visitors’ cars over their road and deck joints.

High Wych is about 3 miles north of Harlow, in Hertfordshire. We send applicators to High Wych for movement joints. Across Hertfordshire, 371 places are covered, High Wych among them. We also cover London, around 23 miles from High Wych.

Business premises anywhere in CM21 are within our area. Streets here include Mansfield, High Wych Lane and Broadfields. Just outside High Wych, we also work in Sawbridgeworth (1 mile east), Lower Sheering (2 miles east), Allen's Green (2 miles north), Spellbrook (2 miles north-east) and Sheering (3 miles east). A short drive away, we cover Stevenage (15 miles north-west), Bishop's Stortford (4 miles north), Welwyn Garden City (14 miles west), Hoddesdon (7 miles south-west), Cheshunt (10 miles south-west) and Hatfield (15 miles west).

Near you in High Wych

In High Wych, that means premises near The Half Moon Public House, Leventhorpe and Gibberd Garden and the streets around them. The closest station to High Wych is Harlow Mill station, about 1.3 miles south. Other landmarks nearby include Harlow Mill (1.3 miles south) and Princess Alexandra Hospital (3 miles south-west). Not far away are Sawbridgeworth Marsh.

Map of High Wych © OpenStreetMap contributors

Common questions from High Wych clients

Can you take on a job at a hospital such as Rivers Hospital?

Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.

Can you work at a site such as Riverside Business Park, by High Wych?

Yes. Estates, retail parks and business parks around High Wych, Riverside Business Park among them, are all within reach. Send details of the unit and the work through our quote form for a quick quote.

What will the job cost?

Each job is quoted on its own details. For yours, give us a call on 01277 525 020 or email drawings and photos with a description of the work.

Is it fine to apply new sealant on top of old?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Are expansion joints and movement joints the same thing?

The general name is movement joint, and expansion joint is one common type. In everyday use the two names are often swapped and the way they’re sealed is similar.

What sealant do you use in movement joints?

Whatever suits the joint and the specification. We name the proposed product in the quote, so you know what’s going in.

Can weather delay the job?

It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.

Do you need expansion joint sealing in High Wych?

Sometimes the sealant holds but the substrate breaks away. Weak or crumbling concrete, brick or render edges give the sealant nothing sound to grip so edge repair has to come before resealing.

Most enquiries start with one or more of the following:

  • Leaks through car park deck joints onto the level below
  • Rain penetration at brick or block movement joints
  • Joints packed with grit and debris
  • Weathered movement joint sealant that no longer flexes

For buildings at a park such as Riverside Business Park (1 mile south-east of High Wych), brick and panel movement joints are easy to forget until one leaks.

Questions to ask before you book

  • What site paperwork they can supply
  • How long is the guarantee, and what does it include?
  • Their pre-qualification and accreditations
  • Which product they’ll use, and why it suits the joint

How to choose a sealant contractor

Cost factors for movement joints

Before we quote, we look at:

  • Location, for remote and island sites
  • Quantities, in metres or numbers
  • How accessible the joints are
  • The size and state of each joint

There’s no price list, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.

Before you send an enquiry

However big the job, these details speed things up:

  • Your programme or deadline
  • The type of building and who uses it
  • Rough lengths or quantities, or drawings if you have them
  • A wide shot and a close-up of the area

To get a fixed quote, phone 01277 525 020 or email us with the site address and an outline of the work. Our quote form is another easy route.

From enquiry to sign-off

Occupied buildings need a little choreography. We sign and contain the area we’re in, keep walkways clear and work section by section so the rest of the building stays in use. For work around High Wych, we aim to finish in one visit, so photographs and measurements up front really help. That way the right products come on the day.

  1. First, the joints are inspected for width, movement and the type of failure.
  2. A fixed quote follows, naming the sealant and its movement class.
  3. Old sealant and filler are cut out and the joint faces cleaned back to sound material, and we tell you if any edges need repairing first.
  4. We control the depth with backing rod or, in shallow joints, bond-breaker tape.
  5. Where the maker calls for primer, it’s applied first, then the bead goes in and is tooled to a concave finish.
  6. Each joint is inspected and handed over with our 12-month guarantee.

Before we start on site

  • Send your site hours and access windows
  • Explain the parking and delivery arrangements
  • Point out any areas we must not close

Quotes

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.

Ask for a quote

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Accreditations

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