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

Fire Stopping in Wonersh

Need fire stopping in Wonersh? It’s simple: send details, get a quote, we seal, guaranteed.

  • Seals disturbed by maintenance and left open
  • Unsealed openings around new pipes and cables
  • Open linear gaps along the top of fire-resisting walls
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
CHAS accredited
Fully insured: £5m PL

Fire stopping near Wonersh

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

How we handle fire stopping in Wonersh

Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Larger openings and some plastic pipes call for collars, wraps, batts or boards instead. We use sealant where it is the specified product, and we tell you when a detail calls for something else. We work on cable penetrations, service gaps in risers and pipe penetrations, and what we’re called in for most is seals disturbed by maintenance and left open and improvised or mixed-product fire seals. Facilities teams, main contractors and managing agents in Wonersh tend to want the same three things: a fixed quote, no surprises on site and a 12-month guarantee behind the result.

For a smaller site near Wonersh, we plan to do all the penetrations in one go, with the specification and photographs sent in advance. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.

We stand behind the joints we seal with a 12-month guarantee. That covers our preparation and application, and if something we did falls short, we return to it.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Wonersh (GU5)
Wider area
Surrey
Cover
12 months on every job
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Last updated
3 November 2026

For managing agents and facilities managers

We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Wonersh can form part of a wider programme.

Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we’ll confirm them with the quote.

Aftercare for building managers

Cleaning and maintenance staff play a part too. Share these points with them:

  • Don’t let anyone top up a fire seal with the wrong product
  • Check risers and ceiling voids after each round of works
  • Put resealing into every M&E and fit-out package
  • Report damaged or disturbed seals as soon as they’re spotted

Add risers, plant rooms and ceiling voids to routine fire-stopping checks. Look for cracks, unsealed new cables and gaps that have been enlarged, and report them promptly.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. Then the seal goes in while the area is open instead of being left for someone else.

Common questions from Wonersh clients

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

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.

Is Wonersh too far out for you?

No. Places such as Wonersh are covered as much as the big towns. We cover Greater London and the counties of the South East. Good photos up front let us bring everything on the first visit.

Which sealant will you use?

Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.

Are you CHAS accredited and on Constructionline?

Yes. CHAS accredited, Constructionline member, and our applicators hold CSCS cards.

What if there’s asbestos in the old mastic?

Some older mastics, especially in pre-2000 buildings, can contain asbestos. We check the asbestos register before cutting out old sealant in an older building, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.

Can you work to our specification?

Yes. The specification and the manufacturer’s installation guidance are what we work to, and any queries are raised before we start.

Do you need to see the site first?

Many jobs can be quoted from photographs, drawings or a joint schedule. Where they aren’t, we arrange a site visit before quoting.

Different surfaces, different methods

Metal pipes

Metal pipes conduct heat, so their details often call for extra measures along the pipe, and the tested detail may ask for insulation beyond the wall. We follow whatever the detail requires and flag anything we can’t match.

Risers and ceiling voids

Risers and ceiling voids hold most of a building’s service penetrations. Access to these areas is planned with you in advance.

Fire stopping in Wonersh: the local picture

There are several hotels within about 2 miles of Wonersh. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close. Wonersh lies roughly 28 miles out from central London. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal.

Hotels like Barnett Hill House Hotel (less than half a mile north-east of Wonersh) are refurbished in phases, and each phase can open up compartment walls. Theatres, wards and plant rooms at sites like Mount Alvernia Hospital (2.9 miles north of Wonersh) all have compartment walls crossed by services.

Wonersh is about 4 miles south of Guildford, in Surrey. Commercial clients in Wonersh use us for work on service penetrations. 379 places across Surrey fall within our area, including Wonersh. There’s a separate page for Reading, roughly 26 miles from Wonersh.

We take on service penetrations across the GU5 postcode area. We cover commercial and managed buildings on The Street, Woodyers Close and The Close. Nearby places we also cover include Bramley (1 mile west), Shamley Green (1 mile south-east), Birtley Green (1 mile south), Stroud Common (2 miles south-east) and Grafham (2 miles south). Further afield, our area takes in Guildford (4 miles north), Woking (8 miles north), Camberley (12 miles north-west), Epsom (15 miles north-east), Farnham (11 miles west) and Reigate (15 miles east).

Landmarks near Wonersh

In Wonersh, that means premises near Shalford Mill, Broadwater School and The Grantley Arms Public House and the streets around them. For rail, the closest station is Chilworth station, about 1.5 miles north-east of the centre. Well-known places in the area include Surrey Police Museum (2.6 miles north-west) and Guildford Castle (2.9 miles north-west). For a walk, there’s St Martha's Hill and Silent Pool.

Map of Wonersh © OpenStreetMap contributors

Diagnose, treat, sign off

We follow your site rules from the start: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact. If others near Wonersh need work, visits can be combined. You will have a fixed quote before work starts.

  1. First we confirm the product and tested details named in the specification.
  2. We sort the openings by the detail each one needs.
  3. Improvised fillers and failed sealant are removed.
  4. Mineral wool or other backing is fitted where required.
  5. We gun the sealant in to the specified depth around each service and tool it.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

What we need from you

  • Point out parking and an unloading spot
  • Warn occupants and staff about the work
  • Move anything stored against the joints

Getting a fixed quote

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to speak to us on 01277 525 020 or send photos by email with what you know.

Get a quick quote

Read more

Why it’s worth doing now in Wonersh

It is cheaper to seal service penetrations as each services package finishes than to come back for them later. Openings are visible, access is open and nothing has to be taken down. Around Wonersh, it’s better to renew all the failing joints at once. Photos of every joint help us quote for the whole job.

The price depends on the quantity of joints, how much old material needs removing and how the joints are reached. Call for a quote when you are ready.

What you get with us

  • Fixed quotes based on photographs, drawings or a visit
  • CSCS-carded applicators
  • One number for every site we cover
  • Workmanship guaranteed for 12 months

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

Common problems we fix in Wonersh

When a seal departs from its tested detail, the evidence no longer covers it. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are what we find most often.

Most enquiries start with something like this:

  • Hidden openings found during inspections
  • Penetration schedules that need working through
  • Builders’ foam or ordinary silicone in compartment walls
  • Damaged fire seals in risers and voids

Tenant changes at parks like Broadford Business Park, 1.6 miles north-west of Wonersh, bring new data and services, and openings through fire-resisting walls need the specified seal.

Questions to ask before you book

  • Proof of insurance
  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?
  • Is the sealant right for the movement and the substrate?

How to choose a sealant contractor

Accreditations

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