Fire Stopping in How Green
Need fire stopping in How Green? Send us the details for a fixed quote, backed by a 12-month guarantee on the work.
- Expanding foam used as fire stopping
- Old intumescent sealant that has split away
- Unsealed joints where partitions meet the slab
Fire stopping for How Green sites
Send drawings, photos or a joint schedule, or tell us about the site, and we’ll come back with a fixed quote.
Diagnose, treat, sign off
Working in a building that stays open takes some planning. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. For a building around How Green, tell us how to find it and who will meet us. Add it to your enquiry and we’ll build it into the plan.
- We read the specification, drawings or penetration schedule you send.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Unsuitable fillers and loose debris are taken out of each opening.
- 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.
- If an opening needs something other than sealant, we tell you instead of improvising.
Before we start on site
- Agree which areas must stay open
- Tell staff and tenants when we’ll be in
- For older buildings, check the asbestos register before work
Get a fixed quote
A handful of photographs and a postcode is the fastest way to a quote. Send them through the quote form, or phone 01277 525 020 or email a schedule or drawings to discuss it first.
Advice
Fire stopping for commercial buildings in How Green
We should be clear about what we do and don’t do. The designer, fire engineer or building control decides which fire stopping is required; sign-off sits with them too. What we bring is careful installation of the specified sealant, to the maker’s guidance in How Green and nearby. If you are dealing with builders’ foam or ordinary silicone in compartment walls and damaged fire seals in risers and voids, we can help. Searching for sealant specialists in How Green? Mastic Doctor has worked for contractors, FMs and building owners since 2005.
Barn and farm-building conversions near places like How Green 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.
We stand behind the joints we seal: 12 months, guaranteed. It covers how we prepared and applied the sealant.
- Location
- How Green (TN8)
- Region
- Kent
- Guarantee
- 12 months on every job
- Quote
- Fixed quote, scope in writing
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
Why act early in How Green
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. Converted and older buildings near places like How Green tend to move, and aged sealant cracks. The right product, sized to the joint, copes much better.
Small jobs and large programmes are priced from the same things: what’s in scope, how we reach it, what’s specified and when it needs doing. Call for a quote, and you’ll have a fixed figure to work with.
What you get with us
- Public liability insurance in place
- Work carried out by CSCS-carded applicators
- CHAS accredited
- Joints cleaned back to sound surfaces
How Green: questions and answers
How does the move away from BS 476 affect penetration seals in How Green?
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.
Is How Green too far out for you?
Not at all: smaller places are covered as well as towns. Our area covers London and the South East counties. Good photos up front let us bring everything on the first visit.
When can you be on site?
We’re in the office from 8am until 5pm, Monday to Friday. Tell us your site hours and access windows and the work will be fitted around them.
Will your applicators have CSCS cards?
Yes. We use CSCS-carded applicators, which many sites require.
Can you handle several sites?
Yes. Several buildings can share a single quote, with one point of contact across South East England, Greater London and Scotland.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
How long will the new sealant last?
There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular checks let you plan resealing before leaks or damage.
Different surfaces, different methods
Masonry and concrete
Many seals are made in blockwork, brickwork or concrete slabs. Dust and loose debris are cleared out of the opening, with backing added if the detail requires it.
Cables and cable bundles
Single cables and small bundles are often within a fire-rated sealant’s tested detail. The detail limits bundle size and the gaps between and around cables, so we check before sealing.
General trades versus a specialist
Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong normally costs more in the end than doing them right.
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are where general trades tend to cut corners.
What sealant work can’t fix
Not every problem is a sealant problem, and we’re upfront when that’s the case. It won’t fix:
- Walls or floors that aren’t fire-resisting to begin with
- Fire doors, dampers or other fire safety equipment
- Large openings beyond what any sealant detail covers
Not sure which it is? You can speak to us on 01277 525 020 or send photos by email and we will tell you honestly.
What we seal
- Service gaps in risers
- Joints between fire-resisting walls and floors
- Small duct penetrations where the tested detail allows
- Linear gaps at wall heads
- Cable penetrations
- Pipe penetrations
More services for How Green
Fire-rated sealing for How Green buildings
At about 23 miles from central London, How Green is within reach of the capital. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. 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. Our part stays the same: the specified product, installed to its tested detail.
Older community buildings such as Church of St Peter that have been rewired or given new heating can have service gaps through walls worth checking against the specification. On a hospital site such as Edenbridge and District War Memorial Hospital, which lies west of How Green, fire-rated sealant goes in where the specification calls for it, with the work planned around the estates team’s permits. For a school such as Hever Church of England Voluntary Aided Primary School, penetration sealing fits best at the end of the summer works.
How Green is about 7 miles south-west of Sevenoaks, in Kent. We cover How Green and the rest of Kent, and jobs here get the same fixed quote and 12-month guarantee as anywhere else. 931 places across Kent fall within our area, How Green among them. For work in that direction, see our London page.
We take on service penetrations across the TN8 postcode area. Among the streets we cover are Hever Road and How Green Lane. Sites close to How Green are covered too, including Hever (1 mile south), Newtown (2 miles south), Markbeech (2 miles south), Chiddingstone Causeway (3 miles east) and Chiddingstone Hoath (3 miles south-east). Bigger towns within reach include Sevenoaks (7 miles north-east), Royal Tunbridge Wells (8 miles south-east), Tonbridge (7 miles east), Swanley (14 miles north), Kings Hill (14 miles east) and Paddock Wood (12 miles east).
Around How Green
Around How Green, our work takes us to commercial buildings near The Wheatsheaf Public House and Chiddingstone Castle Park and Gardens. The closest station to How Green is Hever station, roughly 1.3 miles south-west of the centre. Well-known places in the area include Tandridge Priory (5.4 miles north-west) and Hever Castle (0.7 miles south).
For managing agents and facilities managers
FMs need a contractor who is easy to get on site. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.
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, and each stage is agreed with your contact.