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

Fire stopping in Gadshill

Fire stopping for Gadshill, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Seals that don’t match their tested detail
  • Unsealed openings around new pipes and cables
  • Fire sealant pulled out of the opening
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
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Signed off, with 12 months’ guarantee.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Fire stopping for businesses in Gadshill

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Commercial clients in Gadshill

CHAS accredited and a Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.

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.

Fire stopping in Gadshill

Where pipes, cables and other services cross a compartment wall or floor, the opening around them has to be closed so fire and smoke can’t move between compartments. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. We work to the product’s tested detail for every seal rather than guesswork. We work on service gaps in risers, cable penetrations and joints between fire-resisting walls and floors, and the usual reasons a site gets in touch are head-of-wall gaps with no fire seal and openings found when ceilings come down for a refit. Whether you call it commercial sealant work, mastic application or joint sealing, in Gadshill it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Barn and farm-building conversions near places like Gadshill often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

The 12-month guarantee covers our workmanship: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Location
Gadshill (ME3)
Wider area
Kent
Cover
A 12-month guarantee
Price
A fixed quote before we start
Call
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Questions we are asked in Gadshill

Is hospital work, at somewhere like French Hospital, something you do?

Yes, healthcare and care buildings are part of our work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

Is Gun Lane Business Centre, near Gadshill, within your area?

Yes, sites like Gun Lane Business Centre are within our area, along with the rest of Gadshill. A few photos and the unit address let us price the work.

How soon can the area be used again?

The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.

What about RAMS and site documents?

Requirements differ from site to site, so list what you need, whether RAMS, insurance or CSCS details, and we will confirm with the quote.

What does an EI 60 rating mean?

Penetration seals are tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. Results are classified under BS EN 13501-2. The rating applies to the product as tested.

When is resealing likely to be due?

There isn’t a single answer, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.

Is Gadshill in your area?

Yes. Gadshill falls within our area, and the simplest way to start is to give us a call on 01277 525 020 or email the details over.

From enquiry to sign-off

We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. Once we are cleared to begin, we take the joints in the sequence agreed with you. For work around Gadshill, we aim to finish in one visit, so we ask for photographs and rough sizes first. That way the right products come on the day.

  1. First we confirm the product and tested details named in the specification.
  2. We sort the openings by the detail each one needs.
  3. Improvised fillers and failed sealant are removed.
  4. Mineral wool or other backing is fitted where required.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

Preparing the site

  • Confirm the product named in the specification
  • Arrange parking or a loading space
  • Point out any areas we must not close

Get a fixed quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photographs and a few notes.

Ask for a quote

Related advice

When to bring in a specialist

For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.

There’s also the paperwork. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and our CSCS-carded applicators are used to working under those rules.

Honest limits

Honesty saves time and money. New sealant won’t cure:

  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Walls or floors that aren’t fire-resisting to begin with
  • Fire doors, dampers or other fire safety equipment

If you are not sure, just call the office on 01277 525 020 or send photos by email and we’ll give you a straight answer before you book.

Surfaces we seal

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

What we are called out for in Gadshill

Mixing products or improvising a detail breaks the link with the test evidence. Gaps beyond the tested size, shallow sealant, no backing where it was needed, or products from different systems mixed together are the usual culprits.

It’s worth sending us details if you spot any of the following:

  • Fire seals cut back for extra cables and never reinstated
  • Unsealed openings around new pipes and cables
  • Builders’ foam or ordinary silicone in compartment walls
  • Seals that don’t match their tested detail

Schools such as Strood Academy often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards.

Before you book anyone

  • Proof of insurance
  • Do they follow the manufacturer’s priming guidance?
  • Can the work be phased to keep areas open?
  • What the guarantee covers, and for how long

Choosing a commercial sealant contractor

Compartments and services around Gadshill

Gadshill lies roughly 25 miles out from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls. In England, Approved Document B covers fire stopping of openings and penetrations. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. We install whatever has been specified, to the product’s tested detail.

In a building such as Church of St John, any service penetration through a fire-resisting wall should be sealed to the specified detail. Residences at universities like University for the Creative Arts - Rochester (to the south-east of Gadshill) have compartment walls that must be resealed whenever services change.

Gadshill is about 2 miles north-west of Rochester, in Kent. Gadshill sits inside our coverage, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 931 places across Kent fall within our area, Gadshill among them. We also cover London, around 25 miles from Gadshill.

Anyone looking for fire stopping in ME3 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on Copperfield Crescent, Charles Dickens Avenue and Gravesend Road or close by, we can quote for service penetrations. Nearby places we also cover include Higham (1 mile north), Shorne Ridgeway (1 mile west), Shorne (1 mile west), Lower Higham (1 mile north) and Mockbeggar (2 miles north-east). Nearby towns on our patch include Maidstone (10 miles south), Sittingbourne (13 miles east), Dartford (10 miles west), Sevenoaks (15 miles south-west), Gravesend (4 miles west) and Northfleet (5 miles west).

Around Gadshill

Around Gadshill, our work takes us to commercial buildings near Sir John Falstaff Public House, Temple School and Higham Primary School. Gadshill’s nearest station is Higham station, roughly 1.2 miles north. Well-known places in the area include Pentagon Shopping Centre (3.3 miles south-east) and Huguenot Museum (2.3 miles south-east). The countryside around Gadshill includes Gad's Hill and Rede Common.

Map of Gadshill © OpenStreetMap contributors

Looking after the joints

To get the most from the new sealant:

  • Keep general-purpose fillers away from compartment walls
  • Agree the fire-stopping specification before services go in
  • Record which product was used where
  • Treat an open penetration as a priority repair

Once the seals are in, tell other trades they exist and must not be disturbed. If a seal has to be opened for a new service, it should be reinstated to the same detail, by someone who knows the system.

Regular walk-rounds of service areas are worth the time. A cracked or disturbed seal found early is a small job.

Accreditations

Trusted. Accredited. Insured.