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

Hockenden fire stopping

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

  • Head-of-wall gaps with no fire seal
  • Fire-stopping items raised at inspection or handover
  • Seals disturbed by maintenance and left open
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
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping across Hockenden

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

Service penetrations in Hockenden buildings

London’s office and residential buildings are refitted constantly, and each round of cabling or pipework can leave open penetrations. We install fire-rated sealant where it is specified and work within the building manager’s permit system. A number of hotels sit less than 2 miles from Hockenden. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal.

For a hospital such as Queen Mary's Hospital, which lies north-west of Hockenden, penetration sealing is normally phased ward by ward, with infection-control rules agreed first. Campus buildings at universities such as University of Greenwich Avery Hill Campus, 4.4 miles to the north-west of Hockenden, see constant changes to data and services, and fire-rated sealant goes in around new penetrations where it is specified.

Hockenden is about 2 miles north-east of Orpington, in Greater London. Anywhere in BR8, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. 764 places across Greater London fall within our area, including Hockenden. For work in that direction, see our London page, about 13 miles away.

Business premises anywhere in BR8 are within our area. Close to Hockenden, our area also takes in Upper Ruxley (1 mile north-west), Stonehill Green (1 mile north-east), Ruxley (1 mile north-west), Puddledock (2 miles north-east) and Hextable (2 miles north-east). Bigger towns within reach include London (13 miles north-west), City of Westminster (15 miles north-west), Marylebone (15 miles north-west), St Pancras (14 miles north-west), Shoreditch (13 miles north-west) and Walthamstow (15 miles north-west).

Local landmarks in Hockenden

In Hockenden, that means premises near Foots Cray Meadows and Orchards Academy. Hockenden’s nearest station is Swanley station, roughly 1 mile south-east of the centre. Well-known places in the area include London Borough of Bromley Museum (2.6 miles south-west) and Eynsford Castle (3.4 miles south-east). For a walk, there’s The Warren and Summer Hill.

Map of Hockenden © OpenStreetMap contributors

About our fire stopping in Hockenden

We should be clear about what we do and don’t do. The designer, fire engineer or building control decides which fire stopping is required; sign-off sits with them too. We fit the specified fire-rated sealant following that specification and the maker’s installation guidance in Hockenden and nearby. We work on cable penetrations, pipe penetrations and joints between fire-resisting walls and floors, and what we’re called in for most is seals that don’t match their tested detail and openings left by services added after handover. One point of contact handles commercial sealant work in Hockenden from the first photographs to the final walk-round, for single jobs and planned programmes alike.

In London, higher-risk residential buildings under the Building Safety Act bring extra scrutiny of fire-stopping records. Our part is installing the specified fire-rated sealant; tell us what records you need and we will confirm with the quote.

Work we carry out comes with a 12-month guarantee. Should something we installed fail, give us a call on 01277 525 020 or use the quote form and we’ll come back to it.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
Hockenden (BR8)
Region
Greater London
Guarantee
12 months on every job
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Updated
3 November 2026

Leave it or put it right?

The longer openings stay, the more there tend to be: each new service adds to the list. Keeping on top of it after each round of works keeps the job small. Repeat call-outs disrupt occupied London buildings, so a proper job first time, with the old sealant fully removed, is worth it.

The product called for affects the cost, and so does the preparation. Access, phasing and site requirements come into it too.

Why us?

  • Old sealant cut out, never sealed over
  • Work carried out by CSCS-carded applicators
  • A fixed quote before work starts
  • One number for every site we cover

Read how commercial sealant jobs are priced and how we’re accredited.

When to bring in a specialist

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

For most general trades, sealant is a sideline. A specialist brings correct preparation, depth control with backing rod and a product suited to that particular joint.

Do you need fire stopping in Hockenden?

Head-of-wall joints and wall-to-wall junctions are frequent weak points. Deflection and building movement can open these gaps. The tested detail for a linear joint states the width and movement it covers.

Common reasons buildings call us in:

  • Hidden openings found during inspections
  • Openings left by services added after handover
  • Non-fire-rated filler around services
  • Seals disturbed by maintenance and left open

Colleges such as Bird College (2.8 miles north-west of Hockenden) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product.

What to look for in a quote

  • Whether old or failed sealant will be cut out, not overlaid
  • Their plan for phasing and protecting the area
  • What site paperwork they can supply
  • Do they follow the manufacturer’s priming guidance?

How to choose a sealant contractor

FAQs: Hockenden

How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Hockenden?

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 take on a job at a hospital such as Queen Mary's Hospital?

Yes, provided the work is planned with the site’s estates team. Each area is agreed with the ward or department and the estates team in advance.

Will you quote for a small job?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

How long does a job like this take?

The duration is planned around your programme and the access we are given. We will give you an estimate of time on site when we quote.

Are you CHAS accredited?

Yes. Mastic Doctor is CHAS accredited and a Constructionline member.

How much does the work cost?

Each job is quoted on its own details. For yours, ring 01277 525 020 or use the quote form.

Are you insured?

Yes. We’re fully insured, including public liability cover.

Surface by surface

Plastic pipes

In a fire, plastic pipework melts away and leaves an opening. Small sizes are sometimes covered by an intumescent sealant detail, but many need a collar or wrap. We check the pipe material and diameter against the detail before we start.

Risers and ceiling voids

Openings above suspended ceilings are easy to miss. We work through the areas on your schedule methodically.

On site: what to expect

When we get to site, we report to your site contact and complete whatever induction the building runs. Floors, finishes and fittings next to the joints are covered before anything is cut or cleaned, and the work usually takes a single visit for a short list of penetrations, or a phased programme for a whole building. In Hockenden, most buildings stay in use during the work, so we agree zones and timings with the building or facilities manager. Areas are handed back as each section is finished.

  1. First we go through the drawings, schedule or specification for the seals 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. Mineral wool or other backing goes in wherever the detail asks.
  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.

Before we start on site

  • Confirm the product named in the specification
  • Tell staff and tenants when we’ll be in
  • Explain the parking and delivery arrangements

Ask for a quote

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To ask for one, speak to us on 01277 525 020 or email a schedule or drawings.

Get a quick quote

Advice

What affects the price in Hockenden

The price varies from site to site. It mainly depends on:

  • Location, for remote and island sites
  • Working within restricted access windows
  • Which sealant the job calls for
  • The site’s rules and procedures

Every site prices differently: the joint sizes, the specified product, access and working hours each have a bearing. A fixed quote follows once we understand the job.

Before you send an enquiry

We can often quote from photographs and a few details. Please tell us:

  • The type of building and who uses it
  • The postcode of the building
  • Specification clauses that apply
  • Clear photographs of the problem areas

A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.

Accreditations

Trusted. Accredited. Insured.