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

Fire-rated sealing and fire stopping in The Frenches, Hampshire

Need fire stopping in The Frenches? It’s simple: send details, get a quote, we seal, guaranteed.

  • Openings left by services added after handover
  • Penetration schedules that need working through
  • Head-of-wall gaps with no fire seal
1
Send details
Tell us about the site, with photos if you have them.
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
12-month guarantee on our workmanship.
South East, London & Scotland
Constructionline member
£5m public liability

Fire stopping for The Frenches sites

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

Fire stopping in The Frenches, done properly

We should be clear about what we do and don’t do. Deciding the specification sits with the designer, the fire engineer and building control; sign-off sits with them too. What we bring is careful installation of the specified sealant, to the maker’s guidance in The Frenches and nearby. Most enquiries involve seals that don’t match their tested detail and unsealed openings around new pipes and cables, across small duct penetrations where the tested detail allows, joints between fire-resisting walls and floors and cable penetrations. Looking for mastic applicators who cover The Frenches? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.

Smaller places such as The Frenches still have buildings with fire-resisting walls and floors: schools, halls, care homes and commercial conversions. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.

Our workmanship is guaranteed for 12 months, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.

The Mastic Doctor team beside their liveried vans in front of an office building
Place
The Frenches (SO51)
Region
Hampshire
Cover
A 12-month guarantee
Price
Quoted before any work starts
Phone
01277 525 020
Updated
3 November 2026

What we’re called out for in The Frenches

Some service penetrations were never sealed at all because they sat out of sight above a ceiling or inside a riser. They come to light during inspections, refits or when another trade lifts a tile.

These are often picked up first by site or facilities staff:

  • Snag lists that include open service penetrations
  • Non-fire-rated filler around services
  • Unsealed joints where partitions meet the slab
  • Fire-rated sealant that has cracked or shrunk back

Wherever services are added at a hospital such as Romsey Community Hospital, 3.4 miles to the east of The Frenches, the compartment line has to be made good with the specified product.

Before you book anyone

  • Will RAMS and insurance details be available?
  • Their pre-qualification and accreditations
  • How they’ll work around occupants
  • What the guarantee covers, and for how long

How to choose a sealant contractor

On site: what to expect

Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and move on in phases so staff and visitors can carry on around us. Smaller jobs around The Frenches can be grouped with others nearby. A fixed quote is given before anything starts.

  1. The specification and schedule come first, so we know which details apply.
  2. Access, permits and the order of areas are agreed with the site team.
  3. Each opening is checked for wall or floor type, service, gap and depth.
  4. Unsuitable material is removed and the opening cleaned first.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. We tell you about openings that need a different product.

What we need from you

  • Send any specification or drawings in advance
  • Explain the parking and delivery arrangements
  • Make sure the joints can be reached

Getting a fixed quote

Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, call 01277 525 020 or email the details over.

Ask for a quote

Read more

What the job involves on each surface

Small ducts

Small ductwork can sometimes be sealed with sealant where the tested detail includes it. Bigger ducts and fire-resisting ductwork are normally handled with other products, and we’ll say if that applies.

Linear joints

Joints at the top of partitions may need to move as the slab above deflects. We use the product and backing the detail names for that movement, with no gaps along the run.

Work for main contractors and building owners

Housing associations and managing agents often need work done across blocks and communal areas. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

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

Questions about The Frenches

What happens to BS 476 references for fire stopping in The Frenches?

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.

Would you work within a site like Romsey Community Hospital?

Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.

Can you work to our specification?

Yes. Send it with your enquiry, and the quote will be based on it.

Do you need to see the site first?

Many jobs can be quoted from photographs, drawings or a joint schedule. If the job needs a look first, we’ll arrange a visit.

How do we ask for a quote?

It works in four steps: send details, get a quote, we seal, guaranteed. The first step only needs photos and a postcode.

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

No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.

Are you CHAS accredited?

Yes. We’re CHAS accredited and a Constructionline member, which helps with supplier vetting.

Site staff or a sealant specialist?

General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class.

Redoing a failed joint typically costs more than getting it right at the outset, since all of it has to come out and the faces be cleaned back again. For that reason, many FMs and contractors use a sealant specialist from the outset.

Penetration seals near The Frenches

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. What we install is set by the specification, and it goes in to the tested detail.

Older community buildings such as Church of All Saints that have been rewired or given new heating can have service gaps through walls worth checking against the specification. On a site such as Gardeners Business Park (1.7 miles south-west of The Frenches), every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product.

The Frenches is about 3 miles west of Romsey, in Hampshire. We cover The Frenches, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. Our Hampshire coverage takes in 723 places, from busy centres to rural villages. Our Southampton page has more on work in that area.

Work on service penetrations is covered throughout SO51, whatever the building. Close to The Frenches, our area also takes in Shootash (1 mile east), Plaitford Green (2 miles west), West Wellow (2 miles south-west), East Wellow (2 miles south) and Blackhill (3 miles south). A short drive away, we cover Winchester (11 miles east), Eastleigh (10 miles east), Andover (15 miles north), Totton (6 miles south-east), Chandler's Ford (8 miles east) and Hedge End (13 miles south-east).

Around The Frenches

For rail, the closest station is Mottisfont & Dunbridge station, about 2.5 miles north of the centre. Other landmarks nearby include King Johns House (2.7 miles east) and Romsey Community Hospital (3.4 miles east). Green spaces nearby include Copythorne Common.

Map of The Frenches © OpenStreetMap contributors

What happens if it’s left?

Leave a penetration open and smoke and fire can cross into the next compartment far earlier than intended. While the openings can be reached, sealing them is normally straightforward. Wait until ceilings close or areas are occupied and the same work becomes harder to reach. Halls, stores and units around places like The Frenches may not be checked every day, so a failed joint can leak for a while before anyone sees it. Resealing early avoids that.

Access often affects the price as much as the sealing: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

What you get with us

  • Joints cleaned back to sound surfaces
  • Work carried out by CSCS-carded applicators
  • Workmanship guaranteed for 12 months
  • Constructionline member

Read our cost guide or our accreditations and insurance.

Accreditations

Trusted. Accredited. Insured.