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

Lidsing fire stopping

Looking for fire stopping in Lidsing? It’s simple: send details, get a quote, we seal, guaranteed.

  • Service penetrations left open after M&E works
  • Fire seals cut back for extra cables and never reinstated
  • Unsealed penetrations discovered above suspended ceilings
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
The right sealant, to the right depth, neatly finished.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping in Lidsing

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Fire stopping for commercial buildings in Lidsing

Facilities managers in Lidsing often find open service penetrations when ceilings come down for other work. Where the walls and floors already have a fire-stopping specification, we can work to it. Where there isn’t one, the designer or fire engineer needs to set one first. The enquiries we see most involve builders’ foam or ordinary silicone in compartment walls and openings left by services added after handover, across joints between fire-resisting walls and floors, pipe penetrations and cable penetrations. Looking for mastic applicators who cover Lidsing? We have been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.

Barn and farm-building conversions near places like Lidsing 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 is for workmanship rather than wear and tear. Sealant wears with time, and movement, weather, cleaning and use decide how fast, so we are clear about what is covered before work starts.

Where
Lidsing (ME7)
Wider area
Kent
Guarantee
12 months on our workmanship
Quotes
A fixed quote before we start
Phone
01277 525 020
Last updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

After the work

Regular inspection catches problems early. In particular:

  • Keep product data and details in the fire safety file
  • Brief every trade that openings they make must be sealed
  • Keep general-purpose fillers away from compartment walls
  • Look above ceilings when tiles are lifted for other jobs

Once the seals are in, tell other trades they exist and must not be disturbed. Any seal cut back for a new service needs reinstating to its tested detail, by someone who knows the system.

Keep a register of where seals are and what they are made of. When a new service goes through, everyone knows which product and detail to match, which saves guesswork.

Work for main contractors and building owners

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

For main contractors, we work as the sealant subcontractor. We work to your programme, your specification and your site rules, with CSCS-carded applicators on site.

FAQs: Lidsing

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

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. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.

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

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

How long do sealant joints last?

There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

Do you work to architects’ specifications?

Yes. We follow the specification, along with the manufacturer’s installation guidance, and any queries are raised before we start.

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

No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.

How long before the joints can be used?

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

Is colour matching possible?

That depends on the product. Some ranges are wide, others limited, so we will confirm the colours available for the specified product with the quote.

What happens if it’s left?

Sealing behind the M&E trades area by area beats a sweep at the end. Openings are visible, access is open and nothing has to be taken down and each detail can be checked as we go. Converted and older buildings near places like Lidsing tend to move, and aged sealant cracks. The right product, sized to the joint, copes much better.

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 will have a fixed figure to work with.

Why choose Mastic Doctor in Lidsing

  • Fully insured, including public liability cover
  • Over 20 years of commercial sealing
  • 12 months’ guarantee on every job
  • Health and safety: CHAS accredited

Read what affects the cost and how we’re accredited.

How a job runs

Tell us your site hours and access windows and we will plan around them. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. Smaller jobs around Lidsing can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  1. First we confirm the product and tested details named in the specification.
  2. Openings are measured and grouped by detail.
  3. Improvised fillers and failed sealant are removed.
  4. Mineral wool or other backing is fitted where required.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

What we need from you

  • Arrange parking or a loading space
  • Clear stock, furniture or equipment away from the joints
  • Agree which areas must stay open

Ask for a quote

Let us know the site, the scope and your timescale, and we will put a fixed quote together. The easiest way is to speak to us on 01277 525 020 or use the quote form.

Ask for a quote

Advice

Should maintenance staff do it?

Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong usually costs more in the end than doing them right.

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

What the job involves on each surface

Linear joints

Joints at the top of partitions may need to move as the slab above deflects. The specified product and backing for that movement are what goes in.

Cables and cable bundles

Cable penetrations are frequently sealed with fire-rated sealant where the detail allows. The detail limits bundle size and the gaps between and around cables and we work within those limits.

Fire stopping around Lidsing: points for this area

Lidsing lies roughly 31 miles out from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal. For England, the fire stopping of penetrations is dealt with in Approved Document B. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail.

Industrial units on estates such as Lordswood Industrial Estate, 0.8 miles to the west of Lidsing, often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. Theatres, wards and plant rooms at sites like Spire Alexandra Hospital (to the west of Lidsing) all have compartment walls crossed by services. For a building such as Church of St Peter, new heating or data runs are the usual reason penetrations need sealing.

Lidsing is about 2 miles south-east of Chatham, in Kent. We send applicators to Lidsing for service penetrations, handled exactly as we handle every other area. Our Kent coverage takes in 931 places, large and small. Our London page has more on work in that area, about 31 miles away.

We take on service penetrations across the ME7 postcode area, whatever the building. We also cover Dunn Street (1 mile south-east), Bredhurst (1 mile east), Lordswood (1 mile north-west), Kemsley Street (1 mile east) and Scragged Oak (1 mile south-east). A short drive away, we cover Maidstone (5 miles south), Sittingbourne (7 miles east), Gravesend (11 miles north-west), Tonbridge (15 miles south-west), Faversham (14 miles east) and Northfleet (12 miles north-west).

Around Lidsing

We work on buildings around Greenacre Academy, South Wood and The Harrow pub, among other places. The nearest railway station is Rainham (Kent) station, roughly 3.3 miles north-east of the centre. Nearby you’ll also find Allington Castle (3.3 miles south-west) and Medway megaliths (2.8 miles west). The countryside around Lidsing includes Burham Down and Boxley Hills.

Map of Lidsing © OpenStreetMap contributors
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