Fire-rated sealing and fire stopping in Charlwood, Hampshire
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Charlwood and nearby, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Seals that don’t match their tested detail
- Service penetrations left open after M&E works
- Seals disturbed by maintenance and left open
Fire stopping near Charlwood
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Fire stopping in Charlwood
Every service that crosses a compartment wall or floor leaves an opening, and that opening needs sealing to hold back fire and smoke. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. Each seal follows the manufacturer’s tested detail. Site teams most often ask us about snag lists that include open service penetrations and unsealed joints where partitions meet the slab, across linear gaps at wall heads, joints between fire-resisting walls and floors and cable penetrations. Looking for mastic applicators who cover Charlwood? We’ve been sealing commercial buildings since 2005, CHAS accredited and a Constructionline member.
Barn and farm-building conversions near places like Charlwood 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.
We stand by our work with a 12-month guarantee. That covers our preparation and application.
- Where
- Charlwood (SO24)
- Region
- Hampshire
- Guarantee
- 12 months on every job
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Page updated
- 3 November 2026
How the job changes by surface
Metal pipes
Copper and steel pipes are a common service penetration for fire-rated sealant. The tested detail sets the pipe size range, gap, depth and whether insulation can stay on.
Linear joints
Head-of-wall joints often have to absorb slab deflection. The specified product and backing for that movement are what goes in, with no gaps along the run.
General trades versus a specialist
Site maintenance staff can often handle a short internal joint. 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.
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.
Where services cross fire walls in Charlwood
For England, the fire stopping of penetrations is dealt with in Approved Document B. 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. Central London is about 50 miles from Charlwood. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls; the gaps need the specified seal.
On a site such as Mansfield Business Park, 2.4 miles north of Charlwood, every fit-out that runs new services through a compartment wall leaves penetrations to seal with the specified product. In a building such as Monkwood Mission Church, any service penetration through a fire-resisting wall should be sealed to the specified detail.
Charlwood is about 6 miles south-west of Alton, in Hampshire. Anywhere in SO24, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. We work across 723 places in Hampshire, large and small. Sites around Southampton have their own page, roughly 19 miles from Charlwood.
We take on service penetrations across the SO24 postcode area, for business premises of every kind. Nearby places we also cover include Monkwood (1 mile south-west), Kitwood (1 mile north-west), Gilbert Street (1 mile north-west), Ropley (2 miles west) and West Tisted (2 miles south-west). Nearby towns on our patch include Basingstoke (13 miles north), Winchester (12 miles west), Havant (15 miles south), Eastleigh (15 miles south-west), Horndean (12 miles south) and Alton (6 miles north-east).
Near you in Charlwood
A little further out are Alton Community Hospital (4.7 miles north-east). The countryside around Charlwood includes Red Hill and Shutts Copse.
From enquiry to sign-off
Where the site stays busy, we agree a sequence with your contact so the disruption stays in one area at once. Each section is protected, cleaned back and sealed, then reopened once the sealant allows before we move to the next. If others near Charlwood need work, visits can be combined. A fixed quote is given before anything starts.
- We read the specification, drawings or penetration schedule you send.
- On site, each opening is checked against the tested detail it is meant to follow.
- Unsuitable fillers and loose debris are taken out of each opening.
- We fit the backing the detail asks for, to the stated depth.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- If an opening needs something other than sealant, we tell you instead of improvising.
Preparing the site
- Tell us what induction or permit system the site runs
- Confirm the product named in the specification
- Explain the parking and delivery arrangements
Getting a fixed quote
Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we’ll fill any gaps with a visit.
Advice
Questions we’re asked in Charlwood
Is Mansfield Business Park, near Charlwood, within your area?
Yes. We cover Charlwood and the area around it, including industrial estates, business parks and retail parks such as Mansfield Business Park. To start, just call 01277 525 020 or send details through our quote form with the unit, the joints involved and your access times.
What happens to BS 476 references for fire stopping in Charlwood?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
How do you deal with asbestos in old sealant?
Asbestos is possible in some older mastics, particularly in buildings from before 2000. Before we disturb old sealant in an older building, we ask to see the asbestos register or survey, and if asbestos is suspected, work stops until it’s tested. Removing asbestos is a job for asbestos specialists, not us.
Can the building stay open while you work?
Typically, yes. Phased work can be planned so areas stay in use, with each area protected and signed.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
Can you fit around our working hours?
Mention the site’s hours and access windows in your enquiry, and we’ll schedule the work to suit. You can reach the office between 8am and 5pm, Monday to Friday.
Are your applicators CSCS-carded?
Yes. We use CSCS-carded applicators, which many sites require.
What we can’t put right
Our job is the joint, not everything around it. Sealant alone won’t deal with:
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Approving the work on behalf of building control
- Walls or floors that aren’t fire-resisting to begin with
If you are not sure, just give us a call on 01277 525 020 or use the quote form and we’ll give you a straight answer before you book.
Surfaces we seal
- Joints between fire-resisting walls and floors
- Small duct penetrations where the tested detail allows
- Cable penetrations
- Linear gaps at wall heads
- Service gaps in risers
- Pipe penetrations
Owners, agents and contractors
For main contractors, we work as the sealant subcontractor. We work to your programme, your specification and your site rules, and our applicators hold CSCS cards.
Hotels, schools, healthcare sites, offices and retail units come to us directly as well. We plan around the way the building is used, so the building keeps working while we do.
Nearby places to Charlwood
Also in Charlwood
Signs you need fire stopping in Charlwood
Physical damage is another reason seals stop doing their job. Maintenance work can knock a seal, cut it back for an extra cable or remove it with an old pipe.
If one of these sounds familiar, it’s time for a closer look:
- Builders’ foam or ordinary silicone in compartment walls
- Head-of-wall gaps with no fire seal
- Damaged fire seals in risers and voids
- Old intumescent sealant that has split away
Hospital estates such as Alton Community Hospital (to the north-east of Charlwood) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.
Questions to ask before you book
- How they handle RAMS and site documents
- The terms of the workmanship guarantee
- Their approach to joint depth and backing
- The named product and why it was chosen