Fire-rated sealing and fire stopping in Lower Green, Hampshire
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Lower Green and nearby, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Non-fire-rated filler around services
- Seals that don’t match their tested detail
- Penetration schedules that need working through
Fire stopping for businesses in Lower Green
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
How we handle fire stopping in Lower Green
A fire-rated sealant is only one part of a tested system: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. Before we seal anything, we check the opening against the detail it is meant to follow, and we say so if it doesn’t fit. The enquiries we see most involve openings found when ceilings come down for a refit and seals that don’t match their tested detail, on cable penetrations, joints between fire-resisting walls and floors and linear gaps at wall heads. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: in Lower Green, that means joint design, primers and backing rod as standard.
Barn and farm-building conversions near places like Lower Green 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.
What our 12-month guarantee covers is the way we did the job: the preparation, the sealing and the tooling. Damage, later alterations by others and movement beyond what the joint was designed for sit outside it.
- Where
- Lower Green (GU33)
- Wider area
- Hampshire
- Guarantee
- 12 months on our workmanship
- Price
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
When it isn’t the sealant
A proper diagnosis includes knowing what sealant can’t do. We will tell you if the real problem is one of these:
- Construction that lacks the fire resistance the seal relies on
- Deciding what a wall or floor needs, which belongs to the designer
- Signing off or certifying a building’s fire stopping
If in doubt, speak to us on 01277 525 020 or email drawings and photos and we’ll say what we think.
Joints and surfaces we work on
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Cable penetrations
- Linear gaps at wall heads
- Small duct penetrations where the tested detail allows
Places near Lower Green
Other services in Lower Green
After the work
Every sealant joint needs some looking after, and their life depends on movement, exposure, cleaning and use. We suggest:
- Have penetrations checked while they can still be seen
- Flag new cables with no seal around them
- Include service cupboards in routine inspections
- Settle who seals which penetrations at the start of a project
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.
Keep a register of where seals are and what they are made of. When a new service goes through, everyone knows which product and detail to match, which saves guesswork.
Why deal with it now?
Inspections and handover checks often pick up fire stopping. Late discoveries can delay handover while openings are reopened and resealed which is why earlier is better. Halls, stores and units around places like Lower Green may not be checked every day, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.
The work involved drives the cost: removing old material, preparing the joints, the product, the access and how the work is phased. Call for a quote.
Why appoint us
- Fully insured, including public liability cover
- Constructionline member
- Commercial sealant work since 2005
- Clear, fixed quotes
Take a look at our cost guide or how we’re accredited.
Common questions from Lower Green clients
Is a smaller place like Lower Green outside your area?
No. Places such as Lower Green are covered as much as the big towns. We work across Greater London and the South East. Good photos up front let us bring everything on the first visit.
What does the BS 476 change mean for fire-rated sealant in Lower Green?
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 one quote cover more than one building?
Yes. Several buildings can share a single quote, and you deal with one contact throughout.
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 before quoting.
Are you CHAS accredited and on Constructionline?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.
How soon can the area be used again?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, so we will confirm the curing time on the day.
Will you just go over the old sealant?
No. Overlaying old sealant is a frequent cause of early failure, so it all comes out first.
Signs you need fire stopping in Lower Green
Damage plays a part too. Seals get knocked during maintenance, cut back to add a cable or pulled out when services are swapped, and the repair is often skipped.
Common reasons buildings call us in:
- Service penetrations left open after M&E works
- Expanding foam used as fire stopping
- Penetration schedules that need working through
- Seals that don’t match their tested detail
Theatres, wards and plant rooms at sites like Petersfield Community Hospital, 4.1 miles to the south of Lower Green, all have compartment walls crossed by services.
Before you book anyone
- Health and safety accreditation such as CHAS
- Do they follow the manufacturer’s priming guidance?
- Will RAMS and insurance details be available?
- How they’ll work around occupants
Fire stopping in Lower Green: the local picture
Fire stopping of openings and penetrations in England falls under Approved Document B. References to the older BS 476 classes are being removed from it from 2 September 2029, after which the European classification, BS EN 13501-2, is the route, subject to transitional arrangements. What we install is set by the specification, and it goes in to the tested detail. Central London is about 47 miles from Lower Green. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product.
Tenant changes at parks like Ham Barn Business Park (to the east of Lower Green) bring new data and services, and openings through fire-resisting walls need the specified seal. For a building such as Church of St Peter and St Paul, new heating or data runs are the usual reason penetrations need sealing.
Lower Green is about 4 miles north of Petersfield, in Hampshire. Anywhere in GU33, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. Across Hampshire, 723 places are covered, Lower Green among them. For work in that direction, see our Portsmouth page.
Commercial sites across GU33 are covered for service penetrations. Sites close to Lower Green are covered too, including Hawkley (1 mile south), Oakshott (1 mile south), Empshott (1 mile north-east), Steep Marsh (2 miles south) and Selborne (3 miles north). A short drive away, we cover Havant (14 miles south), Fleet (15 miles north), Horndean (11 miles south), Aldershot (15 miles north-east), Alton (6 miles north) and Waterlooville (13 miles south).
What’s near Lower Green
Around Lower Green, our work takes us to commercial buildings near Hawkley Inn, among other places. Lower Green’s nearest station is Liss station, roughly 2.3 miles south-east of the centre. Other landmarks nearby include The Romany Museum (2.3 miles north) and Petersfield Community Hospital (4.1 miles south). The countryside around Lower Green includes Goleigh Hill and Liss Riverside Railway Walk North.
When to bring in a specialist
Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.
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.
Our process
We schedule the visit to fit the site hours and access windows you give us. While we’re working, the area stays contained and tidy, and your contact hears from us before we move to the next area. For work around Lower Green, we aim to finish in one visit, so photos and measurements up front really help. That way the right products come on the day.
- We start with your penetration schedule, drawings or specification.
- Access, permits and the order of areas are agreed with the site team.
- Each opening is checked for wall or floor type, service, gap and depth.
- Unsuitable material is removed and the opening cleaned first.
- Backing and fire-rated sealant are installed to the detail and tooled.
- Anything outside the detail is reported to you rather than sealed.
Getting the site ready
- Send asbestos survey details if the building is pre-2000
- Explain the parking and delivery arrangements
- Confirm the product named in the specification
Ask for a quote
Specifications, drawings and tender packages are welcome with any enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.