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

Fire-rated sealing and fire stopping in Mount Pleasant, East Sussex

Fire stopping in Mount Pleasant, backed by over 20 years in commercial sealing. Fully insured and CHAS accredited.

  • Head-of-wall gaps with no fire seal
  • Improvised or mixed-product fire seals
  • Openings left by services added after handover
1
Send details
Tell us about the site, with photos if you have them.
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
Our workmanship is guaranteed for 12 months.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Fire stopping for Mount Pleasant sites

Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.

How the job changes by surface

Plastic pipes

Plastic pipes soften and collapse in a fire. Some intumescent sealants are tested on smaller plastic pipes. We check the pipe material and diameter against the detail before we start.

Linear joints

Linear joints run along the head of a wall, at a slab edge or between two fire-resisting elements. Their tested detail, under BS EN 1366-4, sets the width, depth, backing and movement allowed and the installation has to fit inside those limits.

Fire stopping in Mount Pleasant

Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We hold no third-party fire-stopping installer certificate. What we offer is careful installation of the specified sealant to its tested detail, with a 12-month guarantee on our workmanship. Most enquiries involve penetration schedules that need working through and fire-rated sealant that has cracked or shrunk back, on service gaps in risers, joints between fire-resisting walls and floors and small duct penetrations where the tested detail allows. One point of contact handles commercial sealant work in Mount Pleasant from the first photos to the final walk-round, whether it’s one building or several.

Barn and farm-building conversions near places like Mount Pleasant 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.

A 12-month guarantee applies to all our work. Should something we installed fail, give us a call on 01277 525 020 or email the details over and we’ll come back to it.

Place
Mount Pleasant (BN8)
Region
East Sussex
Guarantee
12 months on every job
Price
A fixed quote before we start
Call
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team beside their liveried vans in front of an office building

From enquiry to sign-off

Before we leave any area, we remove the tape, clean down and inspect every joint. If an area should be left alone while the sealant cures, we say how long and put signs out. Jobs in and around smaller places like Mount Pleasant are usually planned as a single visit, so photos and measurements up front really help. That way the right products come on the day.

  1. The specification and schedule come first, so we know which details apply.
  2. We plan the sequence of floors, risers and voids with you.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned first.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. Anything outside the detail is reported to you rather than sealed.

What we need from you

  • Explain the parking and delivery arrangements
  • For older buildings, check the asbestos register before work
  • Send your site hours and access windows

Request a quote

If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price against exactly what is specified. Smaller jobs need nothing more than photos and a few notes.

Ask for a quote

Read more

Building owners, agents and FMs in Mount Pleasant

Blocks and communal areas make up much of the work for housing associations and agents. We phase the work so people keep access, with each stage agreed with your site contact.

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

Service penetrations in Mount Pleasant buildings

Central London is about 40 miles from Mount Pleasant. 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. In England, Approved Document B covers fire stopping of openings and penetrations. 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. Our part stays the same: the specified product, installed to its tested detail.

Industrial units on estates such as Diplocks industrial estate, 2.9 miles to the south-east of Mount Pleasant, often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal. For a building such as St Bartholomews, new heating or data runs are the usual reason penetrations need sealing. In a school such as Barcombe Church of England Primary School, fire-rated sealant goes in around service penetrations where it is specified.

Mount Pleasant is about 4 miles north of Lewes, in East Sussex. Businesses, contractors and managing agents in Mount Pleasant use us for work on service penetrations. 308 places across East Sussex fall within our area, including Mount Pleasant. Brighton is covered too, around 10 miles from Mount Pleasant.

Anyone looking for fire stopping in BN8 gets the same process as the rest of our area: details, then a fixed price, then sealing and a 12-month guarantee. If your building is just outside Mount Pleasant, we cover Barcombe Cross (1 mile south-west), Barcombe Mills (1 mile south), Barcombe (1 mile south), Isfield (2 miles east) and Upper Wellingham (2 miles south). Further afield, our area takes in Eastbourne (15 miles south-east), Seaford (11 miles south), Lewes (4 miles south), Hailsham (11 miles south-east), Crowborough (10 miles north-east) and Uckfield (4 miles north-east).

Near you in Mount Pleasant

Recent enquiries here include premises near Royal Oak pub and Chailey School and the streets around them. The nearest railway station is Cooksbridge station, about 2.5 miles south-west. Other landmarks nearby include Museum of Agricultural Bygones (3.9 miles south-east) and Uckfield Community Hospital (4.2 miles north-east). Open spaces near Mount Pleasant include Offham Hill and Malling Down.

Map of Mount Pleasant © OpenStreetMap contributors

Common questions from Mount Pleasant clients

Will you take on work at estates like Diplocks industrial estate, close to Mount Pleasant?

Yes. Our area takes in Mount Pleasant and its surroundings, with estates and business parks such as Diplocks industrial estate included. A few photos and the unit address let us price the work.

What happens to BS 476 references for fire stopping in Mount Pleasant?

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.

What will the job cost?

That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote and we’ll price it properly.

When can the area be used after sealing?

That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we will confirm the curing time on the day.

Will your applicators have CSCS cards?

Yes. If you need card details for site access, tell us and we will confirm them with the quote.

Is any job too small?

Whatever the size, the process is the same: details, then a fixed price, then sealing, then a 12-month guarantee.

How many days will you need on site?

That varies with the scale of the job, though a typical visit typically takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence. For bigger or phased jobs, we’ll set out a timescale with the quote.

After the work

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

  • Leave fire sealant to cure fully before covering it
  • Keep product data and details in the fire safety file
  • Don’t let anyone top up a fire seal with the wrong product
  • Put resealing into every M&E and fit-out package

Keep the product data and installation details with the building’s fire safety information. Anyone resealing later needs to know which product and detail were used.

Specify fire stopping early on refits, not as an afterthought. The designer can then choose details that suit the services planned, and installation follows the programme.

Quoting for work in Mount Pleasant

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

  • Location, for remote and island sites
  • Removal of failed or old sealant
  • How accessible the joints are
  • Joint width, depth and condition

What a job costs comes down to how many linear metres there are, how much old material needs removing and the access. Call for a fixed quote when you’re ready.

Details that help us quote

Good information means a firmer quote. When you get in touch, include:

  • Any specification or named product
  • Drawings or a marked-up plan, if available
  • Whether the building will be occupied during the work
  • The postcode of the building

Photos, drawings or a schedule of the joints and a fixed quote comes back to you. Where a site visit makes more sense, we’ll arrange one.

What we can’t put right

Not every problem is a sealant problem, and we’re upfront when that’s the case. These need a different solution:

  • Writing the fire-stopping specification
  • Fire doors, dampers or other fire safety equipment
  • Construction that lacks the fire resistance the seal relies on

Not sure which it is? You can speak to us on 01277 525 020 or email us and we’ll tell you honestly.

Surfaces we seal

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

Trusted. Accredited. Insured.