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

Fire-rated sealing and fire stopping in Hoo St Werburgh, Medway

Planning work on a service penetration in Hoo St Werburgh? We assess it, carry out the work and guarantee our workmanship for 12 months.

  • Fire sealant pulled out of the opening
  • Fire-stopping items raised at inspection or handover
  • Builders’ foam or ordinary silicone in compartment walls
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
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Fire stopping for Hoo St Werburgh sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

Fire stopping in Hoo St Werburgh, done properly

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. What we bring is careful installation of the specified sealant, to the maker’s guidance on sites in Hoo St Werburgh. The enquiries we see most involve openings found when ceilings come down for a refit and fire-rated sealant that has cracked or shrunk back, on linear gaps at wall heads, cable penetrations and pipe penetrations. Whether you call it commercial sealant work, mastic application or joint sealing, in Hoo St Werburgh it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Buildings in a smaller place such as Hoo St Werburgh that need fire-rated sealing are typically schools, care homes, surgeries, small offices and flats over shops. Around those penetrations, fire-rated sealant is installed if specified, with depth, backing and gap all as tested.

Work we carry out in Medway comes with a 12-month guarantee. Should something we installed fail, speak to us on 01277 525 020 or email drawings and photos and we will come back to it.

Location
Hoo St Werburgh (ME3)
Wider area
Medway
Cover
A 12-month guarantee
Quotes
Quoted before any work starts
Call
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Different surfaces, different methods

Risers and ceiling voids

Risers and ceiling voids hold most of a building’s service penetrations. Access is often tight, so we agree it with you in advance along with any permits your site needs.

Drylining partitions

Holes in board are often cut larger than needed. An oversized hole may be outside the sealant’s range.

When it isn’t the sealant

Honesty saves time and money. Fresh joints won’t solve:

  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Approving the work on behalf of building control
  • Plastic pipes whose detail calls for a collar or wrap

If in doubt, phone 01277 525 020 or use the quote form and we will say what we think before you book.

Where we work in Hoo St Werburgh

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

Building owners, agents and FMs in Hoo St Werburgh

Hospitality, education, healthcare, office and retail clients book us directly too. The work is planned around how the building runs, so the building keeps working while we do.

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we’ll confirm with the quote.

Should maintenance staff do it?

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.

A short, simple internal joint is often within reach of a maintenance team. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Aftercare for building managers

After handover, a little attention goes a long way:

  • Leave fire sealant to cure fully before covering it
  • Have penetrations checked while they can still be seen
  • Record which product was used where
  • Look above ceilings when tiles are lifted for other jobs

Give the sealant its full cure time before ceilings, boxing or decoration go over it. Some fire-rated sealants accept paint and some don’t, so check the product data first.

A simple record of seal locations and products helps. It tells the next contractor exactly what to reinstate.

Your questions answered

Is Hoo St Werburgh too far out for you?

Not at all. Hoo St Werburgh is within our area. London and every South East county are within our area. Where we can, we group nearby jobs to make the most of each trip.

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

Yes, hospitals are one of the sectors we cover. Each area is agreed with the ward or department and the estates team in advance.

What do BS EN 1366-3 and BS EN 13501-2 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. That rating only holds when the product is installed to its tested detail.

When is resealing likely to be due?

Nobody can honestly give a figure in years, 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 guarantee your work?

Yes. It runs for twelve months and covers how we prepared and sealed the joints, though not damage or work by other trades.

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

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

What site paperwork can you supply?

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

On site: what to expect

Occupied buildings need a little choreography. The work area is signed and kept contained, keep walkways clear and move on in phases so staff and visitors can carry on around us. For a job in Hoo St Werburgh, the main thing is a clear picture of the work. A fixed quote follows.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Foam, ordinary sealant and debris come out first.
  5. The specified backing and sealant go in to depth and are finished neatly.
  6. Anything outside the detail is reported to you rather than sealed.

Getting the site ready

  • Let us know about inductions and permits
  • Make sure the joints can be reached
  • Share your working hours and any access restrictions

Request a quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, call the office on 01277 525 020 or send details through our quote form.

Get a quick quote

Advice

Fire-rated sealing for Hoo St Werburgh buildings

Approved Document B is the English guidance that covers fire stopping around openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Either way, we install the specified product to its tested detail. Hoo St Werburgh is about 29 miles from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.

Where a unit on an estate such as Pier Road Industrial Estate (2.1 miles south of Hoo St Werburgh), has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail. Large healthcare estates like Medway Maritime Hospital (to the south of Hoo St Werburgh) change their services often, so penetration seals are worth checking after M&E work. At a college such as MidKent College Gillingham Campus, 2.3 miles south of Hoo St Werburgh, checking penetration seals after summer M&E works is good practice.

Hoo St Werburgh is about 4 miles north-east of Rochester, in Medway. Looking for fire stopping in Hoo St Werburgh? We can help, as we do across Medway. We work across 54 places in Medway, large and small. There’s a separate page for London, about 29 miles away.

Postcode districts covered here: ME3. Streets here include Walters Road, St Johns Road and Bell's Lane, and sites on any of them can send details for a fixed quote. If your building is just outside Hoo St Werburgh, we cover Chattenden (1 mile west), Sharnal Street (1 mile north-east), Lower Upnor (2 miles south-west), Kingsnorth (2 miles east) and Tunbridge Hill (2 miles north-east). A short drive away, we cover Gillingham (4 miles south), Chatham (5 miles south), Rochester (4 miles south-west), Rainham (5 miles south-east), Strood (4 miles south-west) and Luton (4 miles south). Hoo St Werburgh ranks among the main centres of Medway, with offices, shops, schools and other public and commercial buildings, and we cover them all.

Local landmarks in Hoo St Werburgh

Recent enquiries here include premises near The Hundred of Hoo Academy and The Chequer's Public House. Hoo St Werburgh’s nearest station is Gillingham (Kent) station, about 2.7 miles south. Well-known places in the area include Upnor Castle (1.9 miles south-west) and Huguenot Museum (3.5 miles south-west). Green spaces nearby include Bishop Saltings and Gad's Hill.

Map of Hoo St Werburgh © OpenStreetMap contributors
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