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

Fire stopping in Sewards End

Fire-rated and intumescent sealing of service penetrations and linear gaps across Sewards End, carried out by CSCS-carded applicators. CHAS accredited and fully insured.

  • Seals disturbed by maintenance and left open
  • Unsealed joints where partitions meet the slab
  • Fire-rated sealant that has cracked or shrunk back
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
A fixed quote for the work, with the scope in writing.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
Fully insured: £5m PL

Need fire stopping in Sewards End?

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Why act early in Sewards End

Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. Putting it right is usually a modest job when the openings are accessible. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. Older rural buildings around Sewards End move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.

A quote for service penetrations depends on how many there are, their condition and the access, and any specification that applies. Call for a quote.

Why us?

  • 12-month guarantee on workmanship
  • CHAS accredited contractor
  • Sealing commercial buildings since 2005
  • CSCS-carded applicators

Read our cost guide or how we’re accredited.

About our fire stopping in Sewards End

Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. That classification, such as EI 60 or EI 120, belongs to the product in its tested arrangement. Reproducing the tested arrangement on site is the part we take care of. We work on joints between fire-resisting walls and floors, pipe penetrations and cable penetrations, and the failures we are asked to look at most are fire stopping installed outside its tested range and fire seals cut back for extra cables and never reinstated. A single leaking joint is often how a building in Sewards End first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.

Barn and farm-building conversions near places like Sewards End often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant, and if something we did falls short, we return to it.

Place
Sewards End (CB10)
Region
Essex
Guarantee
A 12-month guarantee
Quotes
Quoted before any work starts
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

Signs you need fire stopping in Sewards End

A common fault is a product that was never fire-rated in the first place: builders’ foam or ordinary silicone used to fill a hole. It may look closed, but it has no tested fire performance in that position, so it has to come out.

Most enquiries start with one or more of the following:

  • Damaged fire seals in risers and voids
  • Unsealed joints where partitions meet the slab
  • Penetration schedules that need working through
  • Old intumescent sealant that has split away

For a building such as St James' Church, new heating or data runs are the usual reason penetrations need sealing.

What your quote should include

  • The named product and why it was chosen
  • Their public liability cover
  • Will RAMS and insurance details be available?
  • Are they CHAS accredited or on Constructionline?

How to choose a sealant contractor

Fire-rated sealing for Sewards End buildings

Sewards End has a number of hotels close by, all within 2 miles. 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. At about 39 miles from central London, Sewards End is within reach of the capital. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product.

Colleges such as St Mark's College, 2.7 miles west of Sewards End, add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. For a hospital such as Saffron Walden Community Hospital (no A&E) (1.2 miles west of Sewards End), penetration sealing is normally phased ward by ward, with infection-control rules agreed first.

Sewards End is about 2 miles east of Saffron Walden, in Essex. Commercial clients in Sewards End use us for work on service penetrations, as part of our coverage of Essex. Sewards End is one of 644 places in Essex on our list. London is covered too, some 39 miles away.

We cover the CB10 postcode districts for service penetrations. Buildings on Walden Road, Tylers and Radwinter Road are within our area. Just outside Sewards End, we also work in Cole End (1 mile south), Saffron Walden (2 miles west), Little Walden (3 miles north-west), Audley End (3 miles west) and Littlebury (3 miles west). Further afield, our area takes in Braintree (15 miles south-east), Great Dunmow (11 miles south), Stansted Mountfitchet (9 miles south-west), Great Notley (15 miles south-east), Bocking (15 miles south-east) and Elsenham (8 miles south).

Local landmarks in Sewards End

For rail, the closest station is Audley End station, about 3.5 miles west of the centre. Other landmarks nearby include Saffron Walden Museum (1.9 miles west) and Saffron Walden Community Hospital (1.2 miles west). For a walk, there’s Hales and Shadwell Woods.

Map of Sewards End © OpenStreetMap contributors

From enquiry to sign-off

Site rules come first: sign-in, induction and whatever permit system the building uses. With the paperwork done, the joints are worked through in the order agreed with your site contact. For a building around Sewards End, tell us how to find it and who will meet us. Add it to your enquiry and we will build it into the plan.

  1. First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  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. If an opening needs something other than sealant, we tell you instead of improvising.

Preparing the site

  • Tell us your opening times and when work is allowed
  • Warn occupants and staff about the work
  • Share the asbestos register for older buildings

Quotes

Every job follows the same four steps: send details, get a quote, we seal, guaranteed. To take the first step, ring 01277 525 020 or send details through our quote form.

Get a price

Read more

What the job involves on each surface

Small ducts

Some fire-rated sealant details cover small ducts. Bigger ducts and fire-resisting ductwork are normally handled with other products and we flag that rather than guess.

Plastic pipes

In a fire, plastic pipework melts away and leaves an opening. Some intumescent sealants are tested on smaller plastic pipes. We confirm material and size first and tell you if sealant isn’t the right product.

Aftercare for building managers

Problems stay small when the joints are checked regularly. Specifically:

  • Get seals inspected before ceilings and boxing close
  • Settle who seals which penetrations at the start of a project
  • Ask which product is in place before decorating
  • Brief every trade that openings they make must be sealed

New services after handover are a common way fire stopping gets breached. Building it into each contractor’s sign-off keeps the walls intact.

Ask every contractor who works in risers or voids to report openings they create. It costs little and catches breaches early.

Your questions answered

Would you work within a site like Saffron Walden Community Hospital (no A&E)?

Yes. Healthcare sites are among the places we work. Each area is agreed with the ward or department and the estates team in advance.

Is Sewards End off your patch?

No. Places such as Sewards End are covered as much as the big towns. London and every South East county are within our area. We plan jobs in smaller places so return trips are kept to a minimum.

What about RAMS and site documents?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.

Do you have third-party installer accreditation for fire stopping?

No, and we’d rather be clear about that. Third-party schemes aren’t a legal requirement, but many clients and main contractors ask for them, so check your contract first. Where it isn’t required, we install the specified sealant to the maker’s details.

Is it fine to apply new sealant on top of old?

No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.

Does the weather affect the work?

For external joints, yes. Sealant needs a dry joint and a temperature within the product’s range, so damp, frosty or very cold days can stop external work. Inside work is seldom held up.

Can you reseal penetrations after our M&E works?

Yes. Send the schedule or marked-up drawings and the specified product details. We can follow the services contractor floor by floor keeping pace with the programme.

Cost factors for service penetrations

What shapes the price:

  • How much existing material needs removing
  • Travel to remote or island sites
  • Site requirements such as inductions and permits
  • The total length or number of joints

Cost follows what’s involved: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a fixed quote and we’ll explain how it’s made up.

What to include in your enquiry

To price the job accurately, we need to understand the site. Send us:

  • The product your specification calls for
  • Anything awkward about access or site hours
  • Drawings or a marked-up plan, if available
  • Any dates the work must fit around

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

Accreditations

Trusted. Accredited. Insured.