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

Alfold Bars fire stopping

Our CSCS-carded applicators take on fire-rated and intumescent sealing of service penetrations and linear gaps in Alfold Bars. Send details for a fixed quote.

  • Penetration schedules that need working through
  • Old intumescent sealant that has split away
  • Improvised or mixed-product fire seals
1
Send details
Tell us about the site, with photos if you have them.
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
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
Fully insured: £5m PL

Fire stopping across Alfold Bars

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

Fire stopping in Alfold Bars

We are commercial sealant applicators, CHAS accredited and a Constructionline member, with CSCS-carded applicators on site. We don’t hold a third-party fire-stopping installer certificate. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. The enquiries we see most involve hidden openings found during inspections and snag lists that include open service penetrations, on pipe penetrations, joints between fire-resisting walls and floors and small duct penetrations where the tested detail allows. Whoever orders the work in Alfold Bars, the brief is usually the same: a clear scope, tidy work and joints that don’t fail again.

For a smaller site near Alfold Bars, we plan to do all the penetrations in one go, so send the specification and photographs first. Design and sign-off belong to the designer or building control; we install what’s specified.

The 12-month guarantee covers our workmanship: preparation, application and finish. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.

Where
Alfold Bars (RH14)
Wider area
West Sussex
Cover
12 months on every job
Quotes
A fixed quote before we start
Telephone
01277 525 020
Updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Penetration seals near Alfold Bars

In England, Approved Document B covers fire stopping of 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 Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. Central London is about 34 miles from Alfold Bars. 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 The Old Brickworks Industrial Estate (2.9 miles east of Alfold Bars), has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail. Older community buildings such as Church of St Nicholas that have been rewired or given new heating can have service gaps through walls worth checking against the specification.

Alfold Bars is about 9 miles west of Horsham, in West Sussex. Across the RH14 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Alfold Bars is one of 373 places we cover in West Sussex for service penetrations. Brighton is covered too, some 25 miles away.

If you need fire stopping in RH14, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Among the streets we cover are Pigbush Lane and Oakhurst Lane. Just outside Alfold Bars, we also work in Alfold (1 mile north), Loxwood (1 mile south), Ifold (2 miles south-west), Plaistow (2 miles south-west) and Durfold Wood (3 miles west). Nearby towns on our patch include Crawley (14 miles east), Horsham (9 miles east), Broadfield (14 miles east), Storrington (12 miles south), Billingshurst (6 miles south-east) and Bewbush (13 miles east).

What’s near Alfold Bars

Recent enquiries here include premises near The Crown pub and Fir Tree Copse and the streets around them. Green spaces nearby include Shillinglee Lake.

Map of Alfold Bars © OpenStreetMap contributors

What we’re called out for in Alfold Bars

Plenty of openings were simply never closed, often hidden above suspended ceilings or behind boxing. They come to light during inspections, refits or when another trade lifts a tile.

Typical triggers for a call:

  • Old intumescent sealant that has split away
  • Fire stopping installed outside its tested range
  • Hidden openings found during inspections
  • Head-of-wall gaps with no fire seal

In a school such as Loxwood Primary School, fire-rated sealant goes in around service penetrations where it is specified.

What your quote should include

  • Is the sealant right for the movement and the substrate?
  • How the joint faces will be prepared and primed
  • Is depth set with backing rod, or bond-breaker tape in shallow joints?
  • Will failed sealant be removed rather than covered?

How to choose a sealant contractor

What happens if it’s left?

A seal that doesn’t match its tested detail gives false comfort. The fix is to remove it and reinstall to the detail, so it makes sense to get it right first time. Converted and older buildings near places like Alfold Bars tend to move, and aged sealant cracks. A sealant with the right movement capability, correctly sized, lasts far better.

Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well.

What you get with us

  • Sealing commercial buildings since 2005
  • A Constructionline member, so easy to vet
  • Products installed to the manufacturer’s instructions
  • Joints cleaned back to sound surfaces

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

Honest limits

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

  • Deciding what a wall or floor needs, which belongs to the designer
  • Large openings beyond what any sealant detail covers
  • Approving the work on behalf of building control

If in doubt, call the office on 01277 525 020 or email the details over and we’ll say what we think before you book.

Where we work in Alfold Bars

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

Aftercare for building managers

A few simple habits keep the new joints working:

  • Settle who seals which penetrations at the start of a project
  • Foam or ordinary sealant is never a fire-seal repair
  • Get seals inspected before ceilings and boxing close
  • Treat an open penetration as a priority repair

Don’t patch a fire-rated seal with anything outside its tested detail. A repair should use the original product, installed the same way unless the designer specifies otherwise.

Ask every contractor who works in risers or voids to report openings they create. It costs little and catches breaches early.

On site: what to expect

Working in a building that stays open takes some planning. The work area is signed and kept contained, keep walkways clear and work section by section so the rest of the building stays in use. Jobs in and around smaller places like Alfold Bars are typically planned as a single visit, so we ask for photos and rough sizes first. Then the right materials arrive with us.

  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. Where the detail needs backing, it goes in at the stated depth.
  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

  • Confirm the product named in the specification
  • Point out parking and an unloading spot
  • Send your site hours and access windows

Get a fixed quote

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or give us a call on 01277 525 020 or email drawings and photos if you’d rather talk the job through.

Get a price

Related advice

Owners, agents and contractors

When you manage a building on behalf of an owner, clear figures and clear communication matter. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative.

Whether you are a managing agent, a property factor or an owner’s representative: send the details, accept a fixed quote, and we carry out and guarantee the work. We can agree access arrangements and keyholder contacts beforehand.

Questions we are asked in Alfold Bars

Is a smaller place like Alfold Bars outside your area?

Not at all: smaller places are covered as well as towns. 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 at a site such as The Old Brickworks Industrial Estate, by Alfold Bars?

Yes, sites like The Old Brickworks Industrial Estate are within our area, along with the rest of Alfold Bars. To start, just phone 01277 525 020 or send details through our quote form with the unit, the joints involved and your access times.

Will fire-rated sealant work on every penetration?

No. It depends on the tested detail for that wall or floor and service. Large openings, many plastic pipes and some ducts need collars, wraps, batts or boards, and we’ll tell you when that applies.

How many days will you need on site?

We plan the time on site around your programme and access. We’ll give you an estimate of time on site when we quote.

Will you quote for a small job?

Small jobs are welcome alongside larger packages. Send details for a fixed quote.

Do you seal on top of existing sealant?

No, never. Overlaying old sealant is a frequent cause of early failure, so everything comes out first.

Which standards are fire seals tested to?

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.

Accreditations

Trusted. Accredited. Insured.