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

Fire-rated sealing and fire stopping in Cobham, Surrey

Fire stopping for Cobham, from a contractor working since 2005. Fully insured and CHAS accredited.

  • Unsealed penetrations discovered above suspended ceilings
  • Head-of-wall gaps with no fire seal
  • Expanding foam used as fire stopping
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
Scope agreed and priced before anything starts.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
Constructionline member
Fully insured: £5m PL

Need fire stopping in Cobham?

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

What we’re called out for in Cobham

Openings in fire-resisting walls typically appear when services are added or changed. New cabling, rerouted pipework or a data route drilled through a riser leaves an opening that nobody returns to. Across several fit-outs, the openings add up.

What tends to prompt an enquiry:

  • Builders’ foam or ordinary silicone in compartment walls
  • Hidden openings found during inspections
  • Fire sealant pulled out of the opening
  • Seals that don’t match their tested detail

Hospital estates such as Cobham Community Hospital and Health Centre (0.5 miles west of Cobham) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

Comparing quotes

  • Will failed sealant be removed rather than covered?
  • Will CSCS-carded applicators be on site?
  • Their pre-qualification and accreditations
  • Can the work be phased to keep areas open?

Choosing a commercial sealant contractor

About our fire stopping in Cobham

Opened ceilings and riser doors often reveal service openings nobody sealed. Where the walls and floors already have a fire-stopping specification, we can work to it. With no specification in place, the first step sits with your designer or fire engineer, not with us. We work on joints between fire-resisting walls and floors, service gaps in risers and linear gaps at wall heads, and the usual reasons a site gets in touch are penetration schedules that need working through and damaged fire seals in risers and voids. Facilities teams, main contractors and managing agents in Cobham tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Buildings in a smaller place such as Cobham 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.

Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

Where
Cobham (KT11)
Wider area
Surrey
Cover
12 months on our workmanship
Price
A fixed quote before we start
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Our process

In a busy building, we agree a sequence with your contact so the disruption stays in one area at once. Each area is protected, prepared and sealed, then reopened once the sealant allows before we move to the next. For a site in Cobham, we plan so the whole job is done in one go where possible. Photos with rough sizes let us arrive with everything needed.

  1. We read the specification, drawings or penetration schedule you send and raise any questions before we price.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  3. Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
  4. Mineral wool or other backing goes in wherever the detail asks.
  5. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Getting the site ready

  • Tell us which areas need to stay in use
  • Flag any permit to work we’ll need
  • Send asbestos survey details if the building is pre-2000

Request a quote

Need a figure for a tender or a budget? Send the scope and any drawings, and we will return a fixed quote you can plan around. If you have questions first, phone 01277 525 020 or email drawings and photos.

Get a price

Read more

What sealant work can’t fix

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

  • Approving the work on behalf of building control
  • Construction that lacks the fire resistance the seal relies on
  • Reviewing a building’s overall fire safety

Not sure which it is? You can call 01277 525 020 or use the quote form and we’ll tell you honestly.

Joints and surfaces we work on

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

Quoting for work in Cobham

Each job is priced on its own details. The main factors are:

  • Whether old sealant has to be cut out first
  • Specialist products, such as fire-rated or hygienic sealants
  • Joint width, depth and condition
  • Quantities, in metres or numbers

The specified product makes a difference, and so does the preparation, such as cutting out, priming or new backing rod. Access, phasing and site rules also count.

Details that help us quote

It doesn’t need to be a full survey. A few details are enough to get going:

  • The product your specification calls for
  • The postcode of the building
  • Drawings or a marked-up plan, if available
  • Photos of the joints, close up and from further back

Tell us about the building, the joints and when you need the work done, and we will put a fixed quote together. To get it moving, call the office on 01277 525 020 or email us.

Cobham: questions and answers

Do you seal service penetrations in hotels around Cobham?

Yes, where fire-rated sealant is the specified product. Each seal follows the tested detail, and rooms are done in turn.

Will you take on work at estates like Hersham Place Technology Park, close to Cobham?

Yes. We cover Cobham and the area around it, including industrial estates, business parks and retail parks such as Hersham Place Technology Park. Photos and a short description are enough for a first look.

Does weather matter for sealant work?

Outside, yes. The joint has to be dry and within the product’s temperature range, so damp, frosty or very cold days can stop external work. Internal work is rarely affected.

How do you deal with asbestos in old sealant?

Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and work stops until any suspect material has been tested. We don’t remove asbestos-containing materials.

Can you fit around our working hours?

Give us your site hours and any access windows in your enquiry, and we will plan around them. You can reach the office between 8am and 5pm, Monday to Friday.

Will you quote for a small job?

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

Can you send site paperwork?

Let us know which documents the site needs, such as RAMS, an insurance certificate or CSCS details, and we will confirm them with the quote.

Fire-rated sealing for Cobham buildings

Fire stopping of openings and penetrations in England falls under 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. There are four care or nursing homes within about 2 miles of Cobham. Care settings depend on compartmentation, so service penetrations made during maintenance or refurbishment need sealing with the specified product. Where that’s fire-rated sealant, we install it to the manufacturer’s tested detail.

On a site such as Hersham Place Technology Park, 2.4 miles north of Cobham, every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product. Schools such as St Andrew's CofE Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards.

Cobham is about 6 miles west of Epsom, in Surrey. Our applicators travel to Cobham for work on service penetrations. Across Surrey, 379 places are covered, Cobham among them. London is covered too, around 17 miles from Cobham.

Anyone looking for fire stopping in KT11 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. If your site is on High Street, Summerhays and Fairfield Park or close by, send details and we’ll quote for service penetrations. Nearby places we also cover include Stoke D'Abernon (1 mile south-east), Oxshott (2 miles east), West End (2 miles north), Pachesham Park (3 miles east) and Esher (3 miles north-east). Further afield, our area takes in Guildford (10 miles south-west), Woking (8 miles west), Camberley (14 miles west), Epsom (6 miles east), Horley (15 miles south-east) and Redhill (12 miles south-east).

What’s near Cobham

Recent enquiries here include premises near The Running Mare pub and West End Common, among other places. For rail, the closest station is Cobham & Stoke Dabernon station, roughly 1.1 miles south of the centre. Nearby you’ll also find Elmbridge Museum (3 miles north-east) and Chessington Castle Hill (4.9 miles east). Open spaces near Cobham include Jubilee Wood and Claremont Lake.

Map of Cobham © OpenStreetMap contributors

Owners, agents and contractors

Main contractors use us as their sealant subcontractor, on new build and refurbishment alike. Programme, specification and site rules come first, with CSCS-carded applicators on site.

Hospitality, education, healthcare, office and retail clients book us directly too. We plan around the way the building is used, so guests, pupils, patients or staff are disturbed as little as possible.

Maintenance after handover

Sealant joints are maintenance items, and their life depends on movement, exposure, cleaning and use. We suggest:

  • Put resealing into every M&E and fit-out package
  • Foam or ordinary sealant is never a fire-seal repair
  • Treat an open penetration as a priority repair
  • Check with the data sheet before painting over fire sealant

Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.

Regular walk-rounds of service areas are worth the time. Catching a damaged seal early keeps the fix small; found late, it can be one of many.

Accreditations

Trusted. Accredited. Insured.