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

Fire-rated sealing and fire stopping in Chilworth, Hampshire

Our CSCS-carded applicators take on fire-rated and intumescent sealing of service penetrations and linear gaps in Chilworth. Send photographs or drawings for a fixed quote.

  • Penetration schedules that need working through
  • Open linear gaps along the top of fire-resisting walls
  • Fire-rated sealant that has cracked or shrunk back
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
CSCS-carded applicators, the right product for each joint.
4
Guaranteed
Signed off, with 12 months’ guarantee.
Covering the South East & Scotland
CHAS accredited
£5m PL insurance

Fire stopping in Chilworth

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

For managing agents and facilities managers

Facilities managers want contractors who arrive with the paperwork sorted. Let us know the documents you need (RAMS, insurance certificate, CSCS details) and we will confirm them with the quote.

Main contractors use us as their sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first, and our applicators hold CSCS cards.

About our fire stopping in Chilworth

A lot of fire-stopping work comes after M&E installation, a refit or a tenant fit-out. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls, often unnoticed. We close the openings listed on your schedule, using the specified sealant and detail. Site teams most often ask us about fire seals cut back for extra cables and never reinstated and old intumescent sealant that has split away, across linear gaps at wall heads, service gaps in risers and small duct penetrations where the tested detail allows. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Chilworth, that means joint design, primers and backing rod as standard.

Rural conversions around Chilworth can put new fire-resisting partitions inside older structures. 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 is signed off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.

Where
Chilworth (SO16)
Region
Hampshire
Guarantee
A 12-month guarantee
Quotes
A fixed quote before we start
Telephone
01277 525 020
Last updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

When to call us in Chilworth

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.

Look out for the following:

  • Penetration schedules that need working through
  • Openings left by services added after handover
  • Expanding foam used as fire stopping
  • Fire seals cut back for extra cables and never reinstated

In a hotel such as DoubleTree by Hilton Hotel Southampton, 0.5 miles to the south-east of Chilworth, new pipework or cabling through bedroom and corridor walls needs sealing with the specified product.

Questions to ask before you book

  • The named product and why it was chosen
  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?
  • Their public liability cover

Questions to ask before you appoint anyone

Looking after the joints

After handover, a little attention goes a long way:

  • Make fire stopping part of every scope that crosses a fire-resisting wall
  • Agree the fire-stopping specification before services go in
  • Flag new cables with no seal around them
  • Record which product was used where

After every round of M&E works, check that the openings created have been sealed. Building it into each contractor’s sign-off keeps the walls intact.

The simplest way to keep compartment walls intact is to plan fire stopping into every job that crosses them. Then the seal goes in while the area is open instead of being left for someone else.

Questions we are asked in Chilworth

Can you work around term dates at a campus such as University of Southampton?

Yes. We plan campus work around teaching, exams and residence turnarounds. Any paperwork you need, from RAMS to our insurance certificate and CSCS details, is confirmed with the quote.

Is Chilworth off your patch?

Not at all. Chilworth is within our area. We work across Greater London and the South East. Where we can, we group nearby jobs to make the most of each trip.

Do you design or specify fire stopping?

No. Deciding what is needed sits with the designer, fire engineer and building control. Our role is fitting the specified fire-rated sealant, following the maker’s tested details.

How do I request a quote?

You can use the quote form on this site; alternatively, call 01277 525 020 or email a schedule or drawings. Include photos or drawings if you have them.

Can weather delay the job?

It can, for external work. Sealant won’t bond properly to a wet or frosty joint, so external work may be moved if conditions aren’t right. Internal work is far less affected.

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

No. We don’t hold a third-party fire-stopping installer certificate. We are CHAS accredited and a Constructionline member, and our applicators are CSCS-carded. If your contract requires third-party installer certification, we are not the right fit for that package.

Do you need to see the site first?

Photos, drawings or a schedule are often enough to quote. Where they aren’t, we arrange a site visit.

Compartment walls and floors in Chilworth

Chilworth has a number of hotels close by, all within 2 miles. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. There are two care or nursing homes within about 2 miles of Chilworth. Care homes rely on fire-resisting walls and floors, and maintenance work that breaks through them leaves openings to seal.

Colleges such as Barton Peveril Sixth Form College, 1.9 miles east of Chilworth, add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product. Large healthcare estates like Princess Anne Hospital (1.9 miles south-west of Chilworth) change their services often, so penetration seals are worth checking after M&E work.

Chilworth is about 2 miles south-west of Chandler's Ford, in Hampshire. Our applicators travel to Chilworth for work on service penetrations, handled exactly as we handle every other area. Our Hampshire coverage takes in 723 places, large and small.

We cover the SO16 postcode districts. We cover commercial and managed buildings on Heatherlands Road, Roman Road and Pinelands Road and the roads nearby. Nearby places we also cover include Chilworth Old Village (1 mile north-west), Bassett (1 mile south), Lordswood (1 mile south-west), Highfield (2 miles south) and North Baddesley (2 miles north-west). Nearby towns on our patch include Winchester (8 miles north-east), Gosport (15 miles south-east), Eastleigh (3 miles east), Fareham (12 miles south-east), Totton (5 miles south-west) and Hedge End (5 miles south-east).

Around Chilworth

In Chilworth, that means premises near Lakeside Country Park and Saint George Catholic Voluntary Aided College Southampton. The nearest railway station is Swaythling station, about 1.9 miles south-east of the centre. A little further out are Princess Anne Hospital (1.9 miles south-west) and Marlands Shopping Centre (3.6 miles south). The countryside around Chilworth includes Flexford Nature Reserve.

Map of Chilworth © OpenStreetMap contributors

How the job changes by surface

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 will say if that applies.

Cables and cable bundles

Data cabling added after handover is a regular cause of open service penetrations. Openings around new cables are resealed to the detail.

Diagnose, treat, sign off

Tell us your site hours and access windows and we will plan around them. While we are working, the area stays contained and tidy, and we check in with your contact before moving on to each new area. For work around Chilworth, we aim to finish in one visit, so we ask for photographs and rough sizes first. That way the right products come on the day.

  1. First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
  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. 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.

What we need from you

  • Have the specification and drawings to hand
  • Tell staff and tenants when we’ll be in
  • Tell us your opening times and when work is allowed

Quotes

Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.

Get a quick quote

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What sealant work can’t fix

Being straight saves everyone time. New sealant won’t cure:

  • Openings that need collars, wraps, batts or boards rather than sealant
  • Designing or specifying fire stopping, which sits with the designer or fire engineer
  • Reviewing a building’s overall fire safety

If in doubt, ring 01277 525 020 or email us and we’ll say what we think before you book.

Joints and surfaces we work on

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

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