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

Fire-rated sealing and fire stopping in Southington, Hampshire

Need fire stopping in Southington? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.

  • Fire stopping installed outside its tested range
  • Fire sealant pulled out of the opening
  • Snag lists that include open service penetrations
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
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
London, the South East & Scotland
CHAS accredited
£5m PL insurance

Need fire stopping in Southington?

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

About our fire stopping in Southington

Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4 and the results are classified to BS EN 13501-2. That classification, such as EI 60 or EI 120, belongs to the product in its tested arrangement. So our job is to reproduce that arrangement faithfully. We work on service gaps in risers, linear gaps at wall heads and cable penetrations, and what we’re called in for most is fire sealant pulled out of the opening and damaged fire seals in risers and voids. Facilities teams, main contractors and managing agents in Southington tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Barn and farm-building conversions near places like Southington 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.

Every job we finish is backed by a 12-month workmanship guarantee, in Southington as everywhere else we work. If our installation lets you down in that time, we return and fix it.

Where
Southington (RG25)
Region
Hampshire
Cover
A 12-month guarantee
Quotes
Fixed quote, scope in writing
Phone
01277 525 020
Page updated
3 November 2026
Mastic Doctor team members lined up next to their branded vans outside an office building

Fire-rated sealing for Southington buildings

At about 54 miles from central London, Southington is within reach of the capital. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. In England, Approved Document B covers fire stopping of openings and penetrations. 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. Our part stays the same: the specified product, installed to its tested detail.

In a school such as Overton Church of England Primary School, fire-rated sealant goes in around service penetrations where it is specified. On estates like Ardglen Industrial Estate, 3 miles west of Southington, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal. Halls and meeting rooms at places like Church of St Mary sometimes gain new services, and any compartment wall crossed needs the specified seal.

Southington is about 8 miles west of Basingstoke, in Hampshire. We send applicators to Southington for service penetrations. Southington is one of 723 places in Hampshire on our list for service penetrations. We also cover Reading, around 19 miles from Southington.

Work on service penetrations is covered throughout RG25, whatever the building. Among the streets we cover are Vinns Lane, London Road and Dellands Lane, and sites on any of them can send details for a fixed quote. Sites close to Southington are covered too, including Overton (1 mile east), Quidhampton (1 mile north-east), Laverstoke (1 mile south-west), Freefolk (1 mile west) and Wells-in-the-Field (2 miles west). A short drive away, we cover Basingstoke (8 miles east), Winchester (13 miles south), Andover (9 miles west), Alton (14 miles south-east), Tadley (10 miles north-east) and Hook (14 miles east).

Landmarks near Southington

Recent enquiries here include premises near The Greyhound pub, among other places. The nearest railway station is Overton station, roughly 1.1 miles north-east. The countryside around Southington includes Ladle Hill.

Map of Southington © OpenStreetMap contributors

Cost factors for service penetrations

Before we quote, we look at:

  • Quantities, in metres or numbers
  • How much existing material needs removing
  • Phasing around occupants
  • How accessible the joints are

Access often affects the price as much as the sealing: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

Before you send an enquiry

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

  • Where the site is, with the postcode
  • Any dates the work must fit around
  • Whether the building will be occupied during the work
  • Whether an asbestos survey exists

Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. For a chat about it beforehand, phone 01277 525 020 or use the quote form.

Surface by surface

Plastic pipes

Plastic pipes soften and collapse in a fire. Small sizes are sometimes covered by an intumescent sealant detail, but many need a collar or wrap. We confirm material and size first and tell you if sealant isn’t the right product.

Linear joints

Head-of-wall gaps, slab edges and wall junctions are linear joints. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers, and we work within it.

Our process

Where the site stays busy, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed, then handed back before the next one starts. Smaller jobs around Southington can be grouped with others nearby, which keeps travel down. You will have a fixed quote before work starts.

  1. First we go through the drawings, schedule or specification for the seals.
  2. Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
  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. We apply the specified sealant to the depth and around the services as the detail shows.
  6. If an opening needs something other than sealant, we tell you instead of improvising.

Preparing the site

  • Share the asbestos register for older buildings
  • Let us know about inductions and permits
  • Agree which areas must stay open

Get a fixed quote

Photos, drawings or a schedule of the joints are often enough for a fixed quote. Where a site visit makes more sense, we’ll arrange one.

Get a price

Advice

When to bring in a specialist

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Certain joints really need a specialist: fire-rated seals that must follow a tested detail, trafficked floor joints and external movement joints among them. A poor seal in places like these tends to cost more to put right later.

Your questions answered

Can you work at a site such as Ardglen Industrial Estate, by Southington?

Yes, sites like Ardglen Industrial Estate are within our area, along with the rest of Southington. A few photos and the unit address let us price the work.

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

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.

Can the sealant be colour-matched?

It depends on the product specified. Some ranges offer many colours, others very few, so we will confirm the colours available for the specified product with the quote.

Do your applicators hold CSCS cards?

Yes. If you need card details for site access, let us know and we’ll send them with the quote.

Can you handle several sites?

Yes. Several buildings can share a single quote, with one point of contact across South East England, Greater London and Scotland.

Can you follow the specification on our project?

Yes. Send it with your enquiry, and we’ll price the work to it, flagging anything that needs clarifying.

Are you CHAS accredited?

Yes. We are CHAS accredited, we are a Constructionline member and we use CSCS-carded applicators.

After the work

A few simple habits keep the new joints working:

  • Report damaged or disturbed seals as soon as they’re spotted
  • Look above ceilings when tiles are lifted for other jobs
  • Put resealing into every M&E and fit-out package
  • Keep product data and details in the fire safety file

Allow the manufacturer’s stated cure time before boxing in or decorating. Not every fire-rated product can be painted, so check the product data first.

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

When something else is needed

Before quoting, we check that sealant is the right answer. It isn’t the answer for:

  • Fire risk assessments, a job for a competent assessor
  • Large openings beyond what any sealant detail covers
  • Walls or floors that aren’t fire-resisting to begin with

If you’re not sure, just give us a call on 01277 525 020 or email us and we’ll give you a straight answer before you book.

Joints and surfaces we work on

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

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