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

Fire-rated sealing and fire stopping in Sandhurst, Bracknell Forest

Fire-rated and intumescent sealing of service penetrations and linear gaps across Sandhurst, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Openings left by services added after handover
  • Fire sealant pulled out of the opening
  • Hidden openings found during inspections
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
The right sealant, to the right depth, neatly finished.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m PL insurance

Need fire stopping in Sandhurst?

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

Do you need fire stopping in Sandhurst?

Damage plays a part too. Maintenance work can knock a seal, cut it back for an extra cable or remove it with an old pipe, and the repair is often skipped.

Look out for the following:

  • Old intumescent sealant that has split away
  • Unsealed openings around new pipes and cables
  • Damaged fire seals in risers and voids
  • Expanding foam used as fire stopping

On a site such as The Meadows Business Park, 1.2 miles south of Sandhurst, every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product.

Comparing quotes

  • What level of public liability insurance do they hold?
  • Do they follow the manufacturer’s priming guidance?
  • The named product and why it was chosen
  • How joint depth will be controlled

Choosing a commercial sealant contractor

Fire stopping for commercial buildings in Sandhurst

Where pipes, cables and other services cross a compartment wall or floor, the opening around them has to be closed so fire and smoke can’t move between compartments. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. We work to the product’s tested detail for every seal rather than guesswork. If you’re dealing with fire-rated sealant that has cracked or shrunk back and builders’ foam or ordinary silicone in compartment walls, we can help, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Sandhurst is the same: the right product in a properly prepared joint.

Towns the size of Sandhurst have plenty of buildings with compartment walls: schools, care homes, surgeries, offices and blocks of flats. Whenever new services go through those walls, the gaps need sealing with the specified product.

Guaranteed is the last step of every job. You get a 12-month guarantee on our workmanship, and the quote explains what it covers.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Sandhurst (GU47, GU15)
Wider area
Bracknell Forest
Cover
A 12-month guarantee
Quote
Quoted before any work starts
Call
01277 525 020
Updated
3 November 2026

Why act early in Sandhurst

Inspections and handover checks often pick up fire stopping. Finding unsealed or improvised openings late can hold up a programme, so earlier action pays back. In a town like Sandhurst, a split, stained or mouldy joint is often the first thing visitors notice. Renewing it keeps the building looking cared for.

A quote for service penetrations depends on how many there are, their condition and the access, plus any specification you are working to. Ask us for a fixed quote.

Why clients in Sandhurst choose us

  • Constructionline member for supplier checks
  • 12-month guarantee on workmanship
  • Work to your specification and the manufacturer’s guidance
  • CSCS-carded applicators

See what affects the cost and our accreditations.

Where services cross fire walls in Sandhurst

Sandhurst is about 32 miles from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls. Fire stopping of openings and penetrations in England falls under Approved Document B. From 2 September 2029, BS 476 references are being taken out of Approved Document B, leaving BS EN 13501-2 classification as the route, subject to the Government’s transitional arrangements. Either way, we install the specified product to its tested detail.

Large healthcare estates like Broadmoor Hospital (1.4 miles north of Sandhurst) change their services often, so penetration seals are worth checking after M&E work. Halls and meeting rooms at places like St George's Church sometimes gain new services, and any compartment wall crossed needs the specified seal.

Sandhurst is about 3 miles north-west of Camberley, in Bracknell Forest. Anywhere in GU47, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Across Bracknell Forest, 48 places are covered, including Sandhurst. There’s a separate page for Reading, about 11 miles away.

Business premises anywhere in GU47 and GU15 are within our area. If your site is on Church Road, Chapel Square and High Street or close by, we can quote for service penetrations. You’ll find Sandhurst on or near the A321 and A3095. Nearby places we also cover include Owlsmoor (1 mile north), College Town (1 mile south-east), Blackwater (1 mile south), Frogmore (1 mile south-west) and York Town (1 mile south-east). Nearby towns on our patch include Bracknell (5 miles north), Wick Hill (5 miles north), Priestwood (5 miles north), Lawrence Hill (6 miles north), North Ascot (6 miles north-east) and Binfield (5 miles north). Sandhurst ranks among the main centres of Bracknell Forest, with offices, shops, schools and other public and commercial buildings, and we cover them all.

Near you in Sandhurst

We work on buildings around The Wellington Arms, College Town Primary School and Sandhurst Memorial Park. The nearest railway station is Sandhurst station, about 0.8 miles west. Well-known places in the area include Pinewood Hospital (2.5 miles north) and Staff College Museum (1.7 miles east). For a walk, there’s Wildmoor Heath and Horseshoe Lake.

Map of Sandhurst © OpenStreetMap contributors

On site: what to expect

Diagnose, treat, sign off: every visit follows that pattern. We inspect the joints and confirm what’s in scope, then we prepare and seal each joint with the specified product, and the job ends with a walk round and sign-off. If you have more than one building in Sandhurst, they can often be done on the same visit, with one quote covering them. Give us your access times and we will fit the work in.

  1. We read the specification, drawings or penetration schedule you send and raise any questions before we price.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  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

  • Agree which areas must stay open
  • Let building users know which areas are affected
  • Confirm the product named in the specification

Get a fixed quote

Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, ring 01277 525 020 or use the quote form.

Get a price

Related advice

Questions about Sandhurst

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

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.

Can you seal around new services in a hotel near Sandhurst?

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

Do you seal on top of existing sealant?

No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.

Do you work to architects’ specifications?

Yes. Send it with your enquiry, and the quote will be based on it, flagging anything that needs clarifying.

Do you cover Sandhurst?

Yes. Sandhurst is in our area, within our coverage of Greater London, South East England and Scotland. To discuss a job, phone 01277 525 020 or send details through our quote form.

Can you work while the building is occupied?

In most cases, yes. We phase the work so most of the building stays in use.

What if there’s asbestos in the old mastic?

The duty to manage asbestos sits with the building’s dutyholder, so we will ask for the register before work on an older building. If anything suspect turns up, we stop until it’s tested.

Different surfaces, different methods

Small ducts

Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Larger or fire-rated ductwork typically needs a different solution set by the designer and we flag that rather than guess.

Metal pipes

Sealant details often cover copper and steel pipework. Pipe diameter, annular gap, sealant depth and any pipe insulation all have to match the detail and we confirm each before sealing.

When something else is needed

Sealant solves a lot, but not everything, and we’re upfront when that’s the case. It won’t fix:

  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Construction that lacks the fire resistance the seal relies on
  • Openings that need collars, wraps, batts or boards rather than sealant

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.

Where we work in Sandhurst

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

How the quote is worked out

Your fixed quote is built from the real scope. It allows for:

  • Which sealant the job calls for
  • Induction, permit and paperwork requirements
  • Location, for remote and island sites
  • The size and state of each joint

Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote and we will put a fixed figure on it.

What to include in your enquiry

A few photos plus some basic facts will normally do. It helps to include:

  • Asbestos survey details if the building is older
  • Where the site is, with the postcode
  • How the joints are reached, and at what height
  • Drawings or a marked-up plan, if available

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. To get it moving, ring 01277 525 020 or email the details over.

Accreditations

Trusted. Accredited. Insured.