The Mastic Doctor team standing beside their branded vans outside an office building
Windsor and Maidenhead · England

Fire Stopping in Datchet

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

  • Non-fire-rated filler around services
  • Fire-rated sealant that has cracked or shrunk back
  • Fire-stopping items raised at inspection or handover
1
Send details
Photos, drawings or a schedule, or we visit.
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
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
Constructionline member
£5m public liability

Fire stopping for businesses in Datchet

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

Fire stopping in Datchet

Facilities managers in Datchet often find open service penetrations when ceilings come down for other work. 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 pipe penetrations, cable penetrations and joints between fire-resisting walls and floors, and what we are called in for most is damaged fire seals in risers and voids and penetration schedules that need working through. Looking for mastic applicators who cover Datchet? We’ve been sealing commercial buildings since 2005.

Converted and extended buildings around places like Datchet can mix old and new construction, so the wall or floor a service passes through isn’t always what the drawings assume. We match the product to the substrate and service, and say so if a collar, wrap or batt is the specified item.

We stand behind the joints we seal with a 12-month guarantee. It covers how we prepared and applied the sealant, and we come back if anything isn’t right.

The Mastic Doctor team standing beside their branded vans outside an office building
Place
Datchet (SL3)
Wider area
Windsor and Maidenhead
Cover
A 12-month guarantee
Price
Quoted before any work starts
Call
01277 525 020
Page updated
3 November 2026

Fire stopping around Datchet: how the place shapes the job

Fire stopping of openings and penetrations in England falls under Approved Document B. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. A 2-mile radius around Datchet takes in plenty of hotels. In hotels, bedroom and corridor walls are typically fire-resisting, so services added in a refit need sealing with the specified product.

For a building at a site such as Portland Business Park, under half a mile to the south-west of Datchet, a check of penetration seals after each fit-out is good practice. Shop fits in centres such as Slough Retail Park, 2.8 miles north-west of Datchet, can bring new services through fire-resisting walls between units, which then need the specified seal.

Datchet is about 2 miles east of Windsor, in Windsor and Maidenhead. Datchet sits inside our coverage and the rest of Windsor and Maidenhead, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. We work across 60 places in Windsor and Maidenhead, from busy centres to rural villages. We also cover Reading, around 17 miles from Datchet.

Postcode districts covered here: SL3 for service penetrations. Buildings on High Street, London Road and Percy Place are within our area. Close to Datchet, our area also takes in Ditton (1 mile north-east), Myrke (1 mile north-west), Sunnymeads (1 mile south-east), Brands Hill (2 miles east) and Old Windsor (2 miles south). Bigger towns within reach include Maidenhead (7 miles west), Boyn Hill (7 miles west), Cookham (8 miles north-west), Furze Platt (8 miles north-west), Dedworth (3 miles west) and Broomhall (7 miles south). Datchet ranks among the main centres of Windsor and Maidenhead, with offices, shops, schools and other public and commercial buildings, and we cover them all.

Local landmarks in Datchet

Recent enquiries here include premises near Churchmead School, Home Park and The Royal Stag pub and the streets around them. Datchet has its own railway station: Datchet station. Other landmarks nearby include Museum of Eton Life (1.5 miles west) and Windsor Castle (1.2 miles west). Green spaces nearby include Staines Reservoirs.

Map of Datchet © OpenStreetMap contributors

When something else is needed

Not every problem is a sealant problem, and we’d rather tell you before you spend money. It won’t fix:

  • Gaps in walls that were never built as compartment walls
  • Deciding what a wall or floor needs, which belongs to the designer
  • Large openings beyond what any sealant detail covers

If you’re not sure, just phone 01277 525 020 or send details through our quote form and we will give you a straight answer.

Where we work in Datchet

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

Common problems we fix in Datchet

Mixing products or improvising a detail breaks the link with the test evidence. An oversized gap, too shallow a bead, missing backing or two makers’ products combined are the usual culprits.

Common reasons buildings call us in:

  • Fire-rated sealant that has cracked or shrunk back
  • Unsealed joints where partitions meet the slab
  • Unsealed penetrations discovered above suspended ceilings
  • Fire-stopping items raised at inspection or handover

On a hospital site such as Princess Margaret Hospital, 1.6 miles south-west of Datchet, fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits.

Questions to ask before you book

  • Whether old or failed sealant will be cut out, not overlaid
  • Who will actually carry out the work
  • How they handle RAMS and site documents
  • How the joint faces will be prepared and primed

Questions to ask before you appoint anyone

Datchet: questions and answers

Do you take on work at healthcare sites like Princess Margaret Hospital?

Yes, healthcare and care buildings are part of our work. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.

How does the move away from BS 476 affect penetration seals in Datchet?

References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

How many days will you need on site?

The duration is planned around your programme and the access we’re given. We’ll give you an estimate of time on site when we quote.

What’s the quickest route to a quote?

It works in four steps: send details, receive a fixed quote, we carry out the work, and it’s guaranteed. Step one needs little more than photos and a postcode.

Do you take on small jobs?

We quote for single jobs as well as large packages and programmes. Send details for a fixed quote.

Can you quote from photos?

That depends on the size and complexity of the job. Simple work can often be priced from photographs, while larger or less clear jobs get a site visit first.

Is the work guaranteed?

Yes. Our workmanship is backed for 12 months on every job.

From enquiry to sign-off

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. Work in places the size of Datchet is planned as a single visit where we can. Clear photos and measurements help us bring the right products.

  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. 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.

Before we start on site

  • Let building users know which areas are affected
  • Clear stock, furniture or equipment away from the joints
  • Have the specification and drawings to hand

Request a quote

Photos, drawings or a schedule of the joints are often enough for a fixed quote. If the job needs a look first, we will arrange a site visit.

Get a quick quote

Advice

What happens if it’s left?

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 and each detail can be checked as we go. Small buildings around Datchet suffer from failed joints as much as large ones. Catching it early means a reseal rather than repairs.

There’s no price list, because the scope varies so much from one building to the next. Call for a quote and we will price your job on its own details.

Why appoint us

  • Sealing commercial buildings since 2005
  • 12 months’ guarantee on every job
  • CHAS accredited
  • One phone line for London, the South East and Scotland

Take a look at how commercial sealant jobs are priced or our accreditations and insurance.

Cost factors for service penetrations

Quotes vary with the job. It mainly depends on:

  • Phasing around occupants
  • Access and working height
  • Backing rod, priming and other preparation
  • Location, for remote and island sites

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.

What we need to price the job

Good information means a firmer quote. Helpful details to send:

  • Access details, including height
  • What the building is and how it’s used
  • The postcode of the building
  • Any specification or named product

Quotes are fixed against the scope you send, so you know the figure before anyone is on site. To start the process, speak to us on 01277 525 020 or email drawings and photos.

Looking after the joints

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

  • Put resealing into every M&E and fit-out package
  • Get seals inspected before ceilings and boxing close
  • Agree the fire-stopping specification before services go in
  • Foam or ordinary sealant is never a fire-seal repair

After the work, brief anyone else working in the area that the openings are now sealed. Any seal cut back for a new service needs reinstating to its tested detail.

Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.

Accreditations

Trusted. Accredited. Insured.