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

Fire-rated sealing and fire stopping in Grange, Medway

Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Grange and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Head-of-wall gaps with no fire seal
  • Openings left by services added after handover
  • Fire sealant pulled out of the opening
1
Send details
Drawings, photos, a joint schedule or a site visit.
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
Backed by a 12-month workmanship guarantee.
South East, London & Scotland
Constructionline member
Fully insured: £5m PL

Need fire stopping in Grange?

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

Compartments and services around Grange

At about 30 miles from central London, Grange is within reach of the capital. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls; the gaps need the specified seal. Fire stopping of openings and penetrations in England falls under Approved Document B. The national BS 476 classes are due to drop out of it from 2 September 2029, leaving the European BS EN 13501-2 route, subject to transitional arrangements. Either way, we install the specified product to its tested detail.

In a retail centre such as Pentagon Shopping Centre, which lies west of Grange, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail. On estates like Beechings Way Industrial Centre, 0.5 miles south of Grange, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal.

Grange is about 1 mile north of Gillingham, in Medway. We send applicators to Grange for service penetrations. Grange is one of 54 places we cover in Medway for service penetrations. There’s a separate page for London, roughly 30 miles from Grange.

We cover the ME7 and ME8 postcode districts for service penetrations. For a building on Grange Road, Lower Featherby Road and Odo Rise or nearby, we can quote for service penetrations. Close to Grange, our area also takes in Lower Twydall (1 mile south-east), Twydall (1 mile south), Gillingham (1 mile south), Darland (2 miles south-west) and Hale (2 miles south-west). A short drive away, we cover Chatham (3 miles south-west), Rochester (4 miles west), Strood (4 miles west), Park Wood (3 miles south), Lordswood (4 miles south-west) and Hoo St Werburgh (3 miles north).

Local landmarks in Grange

We work on buildings around The Robert Napier School, Our Lady of Gillingham Church and Riverside Country Park. You’ll also find The Hastings Arms (under half a mile north-west) and The Robert Napier School (1.1 miles south-west). The nearest railway station is Gillingham (Kent) station, about 1.3 miles west of the centre. Well-known places in the area include Huguenot Museum (3.3 miles west) and Pentagon Shopping Centre (2.4 miles west). Green spaces nearby include Bishop Saltings.

Map of Grange © OpenStreetMap contributors

Fire stopping for commercial buildings in Grange

We should be clear about what we do and don’t do. Deciding the specification sits with the designer, the fire engineer and building control; sign-off sits with them too. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance in Grange and nearby. Site teams most often ask us about open linear gaps along the top of fire-resisting walls and hidden openings found during inspections, on linear gaps at wall heads, service gaps in risers and small duct penetrations where the tested detail allows. For commercial sealant work in Grange, you deal with one contact from quote to sign-off, for single jobs and planned programmes alike.

Smaller places such as Grange still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.

Building owners and contractors get the same cover: a 12-month guarantee on our workmanship. It doesn’t extend to damage, faults in the building or work by others, and we’re upfront about that.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Grange (ME7, ME8)
Region
Medway
Guarantee
12 months on every job
Quote
Quoted before any work starts
Call
01277 525 020
Last updated
3 November 2026

Doing it in-house

Paperwork matters too. Main contractors and clients often ask for CSCS cards, RAMS and insurance details, and we’ll confirm the paperwork you need with the quote.

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

Why act early in Grange

Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. Putting it right is normally a modest job when the openings are accessible. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. For buildings around smaller places like Grange, water damage can go unnoticed for longer, especially where a building isn’t used daily, which gives a failed joint time to do damage. Renewing joints in good time avoids the problem.

Whether it’s a single area or a whole estate, the same things set the price: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.

Why us?

  • A Constructionline member, so easy to vet
  • A fixed quote before work starts
  • Sealing commercial buildings since 2005
  • CHAS accredited

See our cost guide or how we’re accredited.

From enquiry to sign-off

Where the site stays busy, the work is phased so only one area is out of use at a time. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. Jobs in and around smaller places like Grange are usually planned as a single visit, so photographs and measurements up front really help. That way the right products come on the day.

  1. First we go through the drawings, schedule or specification for the seals.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  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

  • Flag any permit to work we will need
  • Tell us which areas need to stay in use
  • Share your working hours and any access restrictions

Get a fixed quote

Let us know the site, the scope and your timescale, and a fixed quote will follow. The easiest way is to speak to us on 01277 525 020 or email drawings and photos.

Get a price

Advice

Questions about Grange

Will you work in a care home in Grange without moving residents out?

Yes. We work around residents’ routines, a room or two at a time. Any site rules, from signing in to infection control, are agreed before we start.

Can you work on a hospital site such as Medway Maritime Hospital?

Yes, provided the work is planned with the site’s estates team. Work is phased so departments keep running, under the site’s own rules.

Can you handle several sites?

Yes. We take on portfolio and planned maintenance work, planned site by site to suit how each building is used.

What does an EI 60 rating mean?

In short, BS EN 1366-3 and 1366-4 are the fire tests and BS EN 13501-2 is how results are classified. An EI 60 seal kept its integrity and insulation for 60 minutes as tested.

How do you choose the sealant?

The specification comes first, if there is one. If there isn’t one, it comes down to the joint: how much it moves, what it bonds to and whether it’s wet, trafficked or fire-rated.

Do you certify or sign off fire stopping?

No. We don’t certify or sign off fire stopping, and we hold no third-party fire-stopping installer certificate. Our part is fitting the specified product to its tested detail, and any records you need can be confirmed with the quote.

Will you just go over the old sealant?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

Different surfaces, different methods

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables and we work within those limits.

Small ducts

Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Bigger ducts and fire-resisting ductwork are normally handled with other products.

When it isn’t the sealant

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

  • Large openings beyond what any sealant detail covers
  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Construction that lacks the fire resistance the seal relies on

Not sure which it is? You can call the office on 01277 525 020 or send details through our quote form and we’ll tell you honestly before you book.

Surfaces we seal

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

Do you need fire stopping in Grange?

Some service penetrations were never sealed at all. Inspections, refurbishments and ceiling access normally bring them to light.

If one of these sounds familiar, it’s time for a closer look:

  • Improvised or mixed-product fire seals
  • Non-fire-rated filler around services
  • Service penetrations left open after M&E works
  • Unsealed penetrations discovered above suspended ceilings

At a university such as University of Greenwich - Medway (1.9 miles north-west of Grange), labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work.

Questions to ask before you book

  • Whether old or failed sealant will be cut out, not overlaid
  • Their pre-qualification and accreditations
  • Their public liability cover
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?

How to choose a sealant contractor

Accreditations

Trusted. Accredited. Insured.