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

Woking fire stopping

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

  • Snag lists that include open service penetrations
  • Fire-rated sealant that has cracked or shrunk back
  • Unsealed joints where partitions meet the slab
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.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Need fire stopping in Woking?

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

Fire stopping for commercial buildings in Woking

Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Other openings need collars, wraps, batts, pillows or boards. We use sealant where it is the specified product, and we tell you when a detail calls for something else. If you’re dealing with expanding foam used as fire stopping and unsealed openings around new pipes and cables, we can put it right, on joints between fire-resisting walls and floors, pipe penetrations and small duct penetrations where the tested detail allows alike. A specialist sealant contractor works differently from a general builder: in Woking, that means joint design, primers and backing rod as standard.

On larger sites around Woking, fire-rated sealing typically follows the M&E trades floor by floor. Design and sign-off of fire stopping rest with the designer, fire engineer or building control; we install what has been specified.

Work we carry out in Surrey comes with a 12-month guarantee. If an installation problem shows up, call 01277 525 020 or email the details over and we will arrange a return visit.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Woking (GU21, GU22, GU24, GU3)
Wider area
Surrey
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Call
01277 525 020
Page updated
3 November 2026

What sealant work can’t fix

A few problems need another trade or a different fix, and we point that out rather than sealing over them:

  • Reviewing a building’s overall fire safety
  • Plastic pipes whose detail calls for a collar or wrap
  • Designing or specifying fire stopping, which sits with the designer or fire engineer

Not sure which it is? You can call the office on 01277 525 020 or email the details over and we will tell you honestly.

What we seal

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

Questions we’re asked in Woking

Can work at a site such as University of Surrey fit around teaching?

Yes. Tell us the term dates, vacation periods and access windows, and we’ll plan the work around them. We are CHAS accredited and a Constructionline member, and paperwork such as RAMS is confirmed with the quote.

What does the BS 476 change mean for fire-rated sealant in Woking?

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.

Are you CHAS accredited?

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

How long do sealant joints last?

It depends on movement, UV and weather, cleaning, traffic and the product. Treat them as maintenance items and inspect them regularly.

Is any job too small?

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

Is Woking in your area?

Yes. Woking falls within our area, and the simplest way to start is to ring 01277 525 020 or send details through our quote form.

How do I request a quote?

You can use the quote form on this site; alternatively, speak to us on 01277 525 020 or email us. Include photos or drawings if you have them.

How a job runs

Tell us your site hours and access windows and we will plan around them. On the day, the work area is kept contained and tidy, and your contact hears from us before we move to the next area. Sites in a big town such as Woking frequently have reception sign-in, inductions and permits to work. Tell us about inductions, permits and site hours so the plan fits.

  1. We start with your penetration schedule, drawings or specification.
  2. We plan the sequence of floors, risers and voids with you.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned first.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. We tell you about openings that need a different product.

Preparing the site

  • Let us know about inductions and permits
  • Point out any areas we must not close
  • Share your working hours and any access restrictions

Ask for a quote

For a fixed quote, speak to us on 01277 525 020 or email a schedule or drawings with the site address and an outline of the work. You can also send details through our quote form.

Get a quick quote

Related advice

Owners, agents and contractors

As a CHAS accredited contractor and Constructionline member, we’re straightforward to vet for your supplier list. We are fully insured, and our insurance certificate can go with the quote.

We take on planned maintenance as well as one-off repairs: working through a building or an estate in stages that fit your budget. Sites in Woking can sit alongside others in a wider programme.

General trades versus a specialist

Putting right a botched joint often costs more than sealing it well at the start, since all of it has to come out and the faces be cleaned back again. That’s why many clients bring in a specialist from the beginning.

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, which is what makes a joint last.

How the job changes by surface

Cables and cable bundles

Single cables and small bundles are often within a fire-rated sealant’s tested detail. Bundle size, cable type and the space between cables all matter, so we check before sealing.

Plastic pipes

Plastic waste pipes through slabs come up often. Whether sealant alone is acceptable depends entirely on the tested detail, and we’ll never swap a specified collar for sealant.

Fire stopping in Woking: the local picture

At about 24 miles from central London, Woking is within reach of the capital. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls. The area within 2 miles of Woking holds a number of hotels. Bedroom-to-corridor walls in hotels are normally fire-resisting, so new cabling or pipework through them has to be sealed to the tested detail.

Colleges such as Woking College, 1.3 miles south-east of Woking, add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. Hotels such as DoubleTree by Hilton Hotel Woking, 0.9 miles to the north-east of Woking, rely on fire-resisting walls between bedrooms and corridors, and refits that add services leave penetrations to seal where fire-rated sealant is specified.

Woking is about 24 miles south-west of London, in Surrey. Woking sits inside our coverage, with the same fixed quotes and 12-month guarantee as everywhere else. 379 places across Surrey fall within our area, including Woking. There’s a separate page for Reading, about 20 miles away.

We take on service penetrations across the GU21, GU22, GU24 and GU3 postcode area, whatever the building. Buildings on High Street, Market Walk and Gloucester Square are within our area. You will find Woking on or near the A247 and A320. Just outside Woking, we also work in Goldsworth Park (1 mile west), St John's (1 mile west), Horsell (1 mile north-east), Westfield (1 mile south-east) and Mimbridge (2 miles north). Bigger towns within reach include Guildford (5 miles south), Camberley (7 miles west), Epsom (13 miles east), Farnham (12 miles south-west), Ewell (14 miles east) and Egham (8 miles north). Woking ranks among the main centres of Surrey, with offices, shops, schools and other public and commercial buildings.

Around Woking

Recent enquiries here include premises near The Red Lion pub, Woking High School and Hoe Valley Linear Park, among other places. For rail, the closest station is Woking station, roughly 0.7 miles east of the centre. Nearby you will also find The Peacocks (0.6 miles east) and The Hockey Museum (0.7 miles east). Not far away are Brookwood Lye.

Map of Woking © OpenStreetMap contributors

When to call us in Woking

Most open service penetrations are left by later work. A new cable pulled by an electrician, a pipe rerouted by a plumber or a data run drilled through a riser leaves an opening that nobody returns to. Across several fit-outs, the openings add up.

Any of the following is a good reason to get the joints checked over:

  • Snag lists that include open service penetrations
  • Unsealed penetrations discovered above suspended ceilings
  • Fire stopping installed outside its tested range
  • Unsealed joints where partitions meet the slab

Theatres, wards and plant rooms at sites like Woking Community Hospital, 0.7 miles east of Woking, all have compartment walls crossed by services.

What to look for in a quote

  • Are they CHAS accredited or on Constructionline?
  • What site paperwork they can supply
  • Proof of insurance
  • The terms of the workmanship guarantee

Choosing a commercial sealant contractor

Accreditations

Trusted. Accredited. Insured.