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

Fire-rated sealing and fire stopping in Mountain Street, Kent

Planning work on a service penetration in Mountain Street? We look at it, seal it with the right product and hand it over with a 12-month guarantee.

  • Seals that don’t match their tested detail
  • Hidden openings found during inspections
  • Openings left by services added after handover
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
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
£5m PL insurance

Fire stopping for businesses in Mountain Street

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

Fire stopping for commercial buildings in Mountain Street

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 part is installing fire-rated and intumescent sealant at those openings and along linear gaps, where the specification calls for it. Each seal follows the manufacturer’s tested detail, not a rule of thumb. Most enquiries involve non-fire-rated filler around services and fire-stopping items raised at inspection or handover, on service gaps in risers, cable penetrations and small duct penetrations where the tested detail allows. Whoever orders the work in Mountain Street, the brief is usually the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

A job near Mountain Street is normally planned around one visit, with the specification and photos sent in advance. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.

Work we carry out in Kent comes with a 12-month guarantee. Should something we installed fail, call 01277 525 020 or email drawings and photos and we’ll come back to it.

The Mastic Doctor team standing beside their branded vans outside an office building
Location
Mountain Street (CT4)
Region
Kent
Guarantee
12 months on every job
Price
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026

Different surfaces, different methods

Linear joints

Head-of-wall gaps, slab edges and wall junctions are linear joints. Their tested detail, under BS EN 1366-4, sets the width, depth, backing and movement allowed and the installation has to fit inside those limits.

Small ducts

Some fire-rated sealant details cover small ducts. Larger or fire-rated ductwork usually needs a different solution set by the designer, and we will say if that applies.

When it isn’t the sealant

Before quoting, we check that sealant is the right answer. It won’t put right:

  • Fire risk assessments, a job for a competent assessor
  • Gaps in walls that were never built as compartment walls
  • Writing the fire-stopping specification

If in doubt, call 01277 525 020 or use the quote form and we’ll say what we think.

What we seal

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

How a job runs

Occupied buildings need a little choreography. We sign and contain the area we are in, keep walkways clear and work section by section so the rest of the building stays in use. For a building around Mountain Street, tell us how to find it and who will meet us. Add it to your enquiry and we will build it into the plan.

  1. We ask for the product and detail your designer has specified.
  2. We sort the openings by the detail each one needs.
  3. Old or wrong materials are cut out.
  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. Completed areas are checked with you, with the records agreed when we quoted.

Getting the site ready

  • Tell us what induction or permit system the site runs
  • Send your site hours and access windows
  • Point out any areas we must not close

Quotes

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Share whatever details you have and we will fill any gaps with a visit.

Ask for a quote

Read more

Should maintenance staff do it?

Redoing a failed joint usually costs more than getting it right at the outset, because the whole bead must be removed and the faces cleaned back again. That’s why many clients bring in a specialist from the beginning.

For a quick touch-up, site staff may be fine, but larger jobs are different: a specialist brings efficiency, a consistent finish and a 12-month guarantee.

Common problems we fix in Mountain 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 and later need putting right.

Site and facilities staff are often the first to spot these:

  • Fire sealant pulled out of the opening
  • Head-of-wall gaps with no fire seal
  • Improvised or mixed-product fire seals
  • Fire seals cut back for extra cables and never reinstated

Theatres, wards and plant rooms at sites like Kent and Canterbury Hospital, 5.7 miles east of Mountain Street, all have compartment walls crossed by services.

Comparing quotes

  • Can the work be phased to keep areas open?
  • What the guarantee covers, and for how long
  • Is the sealant right for the movement and the substrate?
  • Whether their applicators hold CSCS cards

How to choose a sealant contractor

What affects the price in Mountain Street

What shapes the price:

  • Access and working height
  • Working within restricted access windows
  • The product specified
  • Travel to remote or island sites

Larger quantities, tricky access or phasing all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.

Before you send an enquiry

There’s no need for a formal survey. A few details are enough to get going:

  • Any dates the work must fit around
  • How the joints are reached, and at what height
  • Specification clauses that apply
  • The asbestos register, for older buildings

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, call the office on 01277 525 020 or send details through our quote form.

Fire stopping in Mountain Street: the local picture

For England, the fire stopping of penetrations is dealt with in 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. Mountain Street is about 49 miles from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product.

For a building such as Church of St Mary, new heating or data runs are the usual reason penetrations need sealing.

Mountain Street is about 6 miles south-west of Canterbury, in Kent. Across the CT4 postcode area, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. 931 places across Kent fall within our area, including Mountain Street. Sites around London have their own page, about 49 miles away.

Anyone looking for fire stopping in CT4 gets the same process as the rest of our area: send details, get a quote, we seal, guaranteed. Nearby places we also cover include Chilham (1 mile north-east), Godmersham (1 mile south), Old Wives Lees (1 mile north), Shottenden (2 miles north-west) and Bilting (2 miles south). A short drive away, we cover Ashford (8 miles south-west), Canterbury (6 miles north-east), Sittingbourne (12 miles north-west), Folkestone (14 miles south-east), Whitstable (9 miles north) and Faversham (6 miles north-west).

Near you in Mountain Street

Recent enquiries here include premises near Woolpack Inn and Broadham Down and the streets around them. The closest station to Mountain Street is Chilham station, about 0.8 miles north-east of the centre. Well-known places in the area include Kent and Canterbury Hospital (5.7 miles east) and Chilham Castle (less than half a mile north).

Map of Mountain Street © OpenStreetMap contributors

FAQs: Mountain Street

Is Mountain Street too far out for you?

Not at all: smaller places are covered as well as towns. Our area covers London and the South East counties. Where we can, we group nearby jobs to make the most of each trip.

Is hospital work, at somewhere like Kent and Canterbury Hospital, something you do?

Yes, provided the work is planned with the site’s estates team. We follow the site’s permits, sign-in and infection-control procedures in every area.

How long will the new sealant last?

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 your workmanship covered by a guarantee?

Yes. Workmanship is guaranteed for 12 months.

Can you reseal penetrations after our M&E works?

Yes, where there is a specification for those walls and floors. Openings left by new services are among the most common jobs we see.

Can you handle several sites?

Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.

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.

Accreditations

Trusted. Accredited. Insured.