Fire Stopping in Wherwell
Fire stopping for Wherwell, from a contractor working since 2005. Fully insured and CHAS accredited.
- Fire seals cut back for extra cables and never reinstated
- Fire sealant pulled out of the opening
- Builders’ foam or ordinary silicone in compartment walls
Fire stopping in Wherwell
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
About our fire stopping in Wherwell
No fire sealant works on its own: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. We match each opening to that detail before any sealant goes in. Most enquiries involve seals that don’t match their tested detail and fire-rated sealant that has cracked or shrunk back, across pipe penetrations, joints between fire-resisting walls and floors and linear gaps at wall heads. Looking for mastic applicators who cover Wherwell? We’ve been sealing commercial buildings since 2005.
Barn and farm-building conversions near places like Wherwell often combine new partitions with old walls. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
Every job we finish is backed by a 12-month workmanship guarantee. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Wherwell (SP11)
- Wider area
- Hampshire
- Cover
- 12 months on our workmanship
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Building owners, agents and FMs in Wherwell
Main contractors use us as their sealant subcontractor. We work to your programme, your specification and your site rules.
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. Our insurance certificate can be sent along with the quote.
What we’re called out for in Wherwell
On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is how unsuitable products and improvised details end up in compartment walls and later need putting right.
What tends to prompt an enquiry:
- Builders’ foam or ordinary silicone in compartment walls
- Service penetrations left open after M&E works
- Openings found when ceilings come down for a refit
- Improvised or mixed-product fire seals
Where a unit on an estate such as Harewood Forest Industrial Estate, 1.9 miles to the north-east of Wherwell, has fire-resisting walls between offices and warehouse, any new service through them should be sealed to the tested detail.
What to look for in a quote
- Which product they’ll use, and why it suits the joint
- How long is the guarantee, and what does it include?
- How the joint faces will be prepared and primed
- Their public liability cover
Cost factors for service penetrations
Quotes vary with the job. Expect it to depend on:
- Specialist products, such as fire-rated or hygienic sealants
- Any access equipment needed
- Working within restricted access windows
- The site’s rules and procedures
What a job costs comes down to how many linear metres there are, how much old material needs removing and how the joints are reached. Call for a fixed quote once you have the details.
What to include in your enquiry
We can often quote from photos and a few details. It helps to include:
- Anything awkward about access or site hours
- Specification clauses that apply
- Any dates the work must fit around
- Approximate linear metres or a joint schedule
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Send what you have, and we will arrange a site visit if anything is unclear.
Fire-rated sealing for Wherwell buildings
Wherwell is about 63 miles from central London. Office refits around the commuter belt bring new cabling through fire-resisting walls. Approved Document B is the English guidance that covers fire stopping around 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.
Large healthcare estates like Andover War Memorial Hospital (to the north-west of Wherwell) change their services often, so penetration seals are worth checking after M&E work. Schools such as Wherwell Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards.
Wherwell is about 3 miles south-east of Andover, in Hampshire. Businesses, contractors and managing agents in Wherwell can call on us for service penetrations. 723 places across Hampshire fall within our area, including Wherwell. There’s a separate page for Southampton, about 17 miles away.
Work on service penetrations is covered throughout SP11. Among the streets we cover are High Street, Fair Piece and Beech Grove. Nearby places we also cover include Wherwell Wood (1 mile north-west), Cottonworth (1 mile south-west), Chilbolton (1 mile south), Fullerton (1 mile south-west) and South Harewood (1 mile north-east) for service penetrations. Nearby towns on our patch include Winchester (9 miles south-east), Eastleigh (14 miles south), Andover (3 miles north-west), Chandler's Ford (13 miles south), Romsey (12 miles south) and Hyde (9 miles south-east).
Local landmarks in Wherwell
In Wherwell, that means premises near White Lion Public House and Longstock Park and the streets around them. For rail, the closest station is Andover station, about 3.7 miles north-west of the centre. Nearby you’ll also find Andover Museum (3.3 miles north-west) and Andover War Memorial Hospital (4 miles north-west). The countryside around Wherwell includes Mill Lake and Anton Lakes.
Places near Wherwell
More services for Wherwell
Looking after the joints
Once the work is signed off, 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
- Foam or ordinary sealant is never a fire-seal repair
- File the specified details where the next contractor can find them
Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.
Regular walk-rounds of service areas are worth the time. A cracked or disturbed seal found early is a small job compared with dozens found at once.
Surface by surface
Cables and cable bundles
New data and power cables are the most common breach we see. Openings around new cables are resealed to the detail, and we tell you if the bundle exceeds what sealant covers.
Risers and ceiling voids
Service risers and the voids above ceilings are where openings collect. Access to these areas is planned with you in advance along with any permits your site needs.
How a job runs
Before we leave any area, the masking comes off, the area is cleaned and every joint is checked. Where the sealant needs time to cure before use, we tell you and sign the area. Smaller jobs around Wherwell can be grouped with others nearby, which keeps travel down. You’ll have a fixed quote before work starts.
- First we go through the drawings, schedule or specification for the seals and ask about anything unclear.
- On site, each opening is checked against the tested detail it is meant to follow.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- We fit the backing the detail asks for, to the stated depth.
- We apply the specified sealant to the depth and around the services as the detail shows.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Before we start on site
- Confirm the product named in the specification
- Share the asbestos register for older buildings
- Tell staff and tenants when we’ll be in
Ask for a quote
To get a fixed quote, speak to us on 01277 525 020 or email us with the site address and an outline of the work. You can also send details through our quote form.
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Your questions answered
Is a hospital such as Andover War Memorial Hospital somewhere you can work?
Yes. We work in healthcare settings as well as offices and schools. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
What does the BS 476 change mean for fire-rated sealant in Wherwell?
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.
Do you need to see the site first?
Many jobs can be quoted from photos, drawings or a joint schedule. If the job needs a look first, we’ll arrange a visit before quoting.
How much does the work cost?
That depends on the job: quantities, access, the product and any phasing. Call for a fixed quote and we will price it properly.
Do you guarantee your work?
Yes. The 12-month guarantee covers our preparation and application, though not damage or work by other trades.
Can the sealant be colour-matched?
In many cases, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We confirm what’s available for the specified product when we quote.
Can staff carry on working while you are here?
Yes, with some planning. Tell us your site hours and access windows and we’ll plan around them.