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

Fire Stopping in Liverton Street

Sealant work in Liverton Street for main contractors, managing agents and facilities managers: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.

  • Service penetrations left open after M&E works
  • Improvised or mixed-product fire seals
  • Seals disturbed by maintenance and left open
1
Send details
Send the specification, photos or a marked-up plan.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
London, the South East & Scotland
Constructionline member
£5m public liability

Fire stopping for Liverton Street sites

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 fire stopping in Liverton Street

Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We don’t hold a third-party fire-stopping installer certificate. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. Site teams most often ask us about seals that don’t match their tested detail and fire-stopping items raised at inspection or handover, across linear gaps at wall heads, small duct penetrations where the tested detail allows and joints between fire-resisting walls and floors. Looking for mastic applicators who cover Liverton Street? We’ve been sealing commercial buildings since 2005.

Smaller places such as Liverton Street still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.

Our workmanship is guaranteed for 12 months, wherever the site is. If our installation lets you down in that time, we return and fix it.

Location
Liverton Street (ME17)
Wider area
Kent
Guarantee
12 months on every job
Price
Quoted before any work starts
Phone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Our process

Working in a building that stays open takes some planning. The work area is signed and kept contained, with routes through the building left open and move on in phases so staff and visitors can carry on around us. If others near Liverton Street need work, visits can be combined. A fixed quote is given before anything starts.

  1. We read the specification, drawings or penetration schedule you send and ask about anything unclear.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  4. We fit the backing the detail asks for, to the stated depth.
  5. We apply the specified sealant to the depth and around the services as the detail shows.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

Preparing the site

  • Arrange parking or a loading space
  • Send your site hours and access windows
  • Share the asbestos register for older buildings

Getting a fixed quote

Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.

Get a quick quote

Read more

How the quote is worked out

Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:

  • How much existing material needs removing
  • Location, for remote and island sites
  • The size and state of each joint
  • Whether the work must be split into stages

Access can matter as much as the joints themselves: 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

We can often quote from photos and a few details. It helps to include:

  • Approximate linear metres or a joint schedule
  • Asbestos survey details if the building is older
  • Where the site is, with the postcode
  • Your programme or deadline

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, phone 01277 525 020 or use the quote form.

What the job involves on each surface

Linear joints

Head-of-wall gaps, slab edges and wall junctions are linear joints. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers, and we work within it.

Metal pipes

Heat travels along metal pipework, and the tested detail may ask for insulation beyond the wall. We follow whatever the detail requires and flag anything we can’t match.

Your questions answered

How does the move away from BS 476 affect penetration seals in Liverton Street?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.

Can you work around term dates at a campus such as Canterbury Christ Church University?

Yes. Tell us the term dates, vacation periods and access windows, and we will plan the work around them. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Can one quote cover more than one building?

Yes. Several buildings can share a single quote, with one point of contact.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and work stops until any suspect material has been tested. Removing asbestos is a job for asbestos specialists, not us.

Are your applicators CSCS-carded?

Yes. Our applicators hold CSCS cards.

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. Internal work is far less affected.

Is colour matching possible?

It depends on the product. Some ranges are wide, others limited, so the available colours are confirmed with the quote.

Where services cross fire walls in Liverton Street

The area within 2 miles of Liverton Street holds a number of hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail. Fire stopping of openings and penetrations in England falls under Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.

Schools such as Platts Heath Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards. Offices at parks like Roebuck Business Park, 1.7 miles north of Liverton Street, are re-cabled with each new tenant, and compartment walls need sealing afterwards to the tested detail.

Liverton Street is about 8 miles south-east of Maidstone, in Kent. Looking for fire stopping in Liverton Street? We can help. Across Kent, 931 places are covered, including Liverton Street. There’s a separate page for London, about 39 miles away.

Business premises anywhere in ME17 are within our area. Sites close to Liverton Street are covered too, including Platt's Heath (1 mile north-east), Boughton Malherbe (1 mile south-east), Grafty Green (1 mile south), Fairbourne Heath (1 mile west) and Sandway (1 mile north-east). Nearby towns on our patch include Maidstone (8 miles north-west), Ashford (10 miles south-east), Sittingbourne (9 miles north), Faversham (11 miles north-east), Minster (15 miles north) and Kings Hill (13 miles west).

Around Liverton Street

Around Liverton Street, our work takes us to commercial buildings near The Lenham School, Kiln Wood and The Kings Head Public House and the streets around them. For rail, the closest station is Lenham station, roughly 1.6 miles north-east. Nearby you will also find Coldbridge Castle (1.5 miles south-east) and The Dog Collar Museum (3 miles north-west).

Map of Liverton Street © OpenStreetMap contributors

When to call us in Liverton Street

On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is how unsuitable products and improvised details end up in compartment walls, which then have to be put right.

Clients typically get in touch after noticing something like this:

  • Improvised or mixed-product fire seals
  • Unsealed joints where partitions meet the slab
  • Unsealed openings around new pipes and cables
  • Expanding foam used as fire stopping

Halls and meeting rooms at places like Church of St Nicholas sometimes gain new services, and any compartment wall crossed needs the specified seal.

Comparing quotes

  • Their approach to joint depth and backing
  • How long is the guarantee, and what does it include?
  • Are they CHAS accredited or on Constructionline?
  • Can the work be phased to keep areas open?

Our contractor checklist

Work for main contractors and building owners

For main contractors, we work as the sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first.

Hospitality, education, healthcare, office and retail clients come to us directly as well. The work is planned around how the building runs, so the building keeps working while we do.

What sealant work can’t fix

A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be any of the following:

  • Reviewing a building’s overall fire safety
  • Writing the fire-stopping specification
  • Issuing fire ratings or certificates for seals

If in doubt, ring 01277 525 020 or email us and we’ll say what we think before you book.

Surfaces we seal

  • Cable penetrations
  • Joints between fire-resisting walls and floors
  • Pipe penetrations
  • Linear gaps at wall heads
  • Service gaps in risers
  • Small duct penetrations where the tested detail allows
Accreditations

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