Fire stopping in Mop End
Fire-rated and intumescent sealing of service penetrations and linear gaps across Mop End, carried out by CSCS-carded applicators. CHAS accredited and fully insured.
- Old intumescent sealant that has split away
- Fire-stopping items raised at inspection or handover
- Openings left by services added after handover
Fire stopping in Mop End
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping for commercial buildings in Mop End
Most of our fire stopping work happens after the building is up. New cable runs, replaced pipework and extra data routes all punch holes in compartment walls. We close the openings listed on your schedule, using the specified sealant and detail. We work on small duct penetrations where the tested detail allows, service gaps in risers and joints between fire-resisting walls and floors, and the failures we’re asked to look at most are fire stopping installed outside its tested range and fire sealant pulled out of the opening. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Mop End, preparation and product choice get the time they need.
A job near Mop End is typically planned around one visit, so send the specification and photos first. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.
Building owners and contractors get the same cover: twelve months on the work we carried out. It doesn’t extend to damage, faults in the building or work by others, and we are upfront about that.
- Location
- Mop End (HP7)
- Region
- Buckinghamshire
- Cover
- A 12-month guarantee
- Quotes
- A fixed quote before we start
- Call
- 01277 525 020
- Updated
- 3 November 2026
For managing agents and facilities managers
We work for building owners and managing agents on sealant work across single buildings or whole portfolios. One quote can cover more than one site, so there’s one set of paperwork to deal with.
As a CHAS accredited contractor and Constructionline member, we make supplier vetting simple. We’re fully insured, and our insurance certificate can go with the quote.
Other services in Mop End
Diagnose, treat, sign off
Site rules come first: signing in, inductions and any permit to work. With the paperwork done, the joints are worked through in the order agreed with your site contact. Jobs in and around smaller places like Mop End are typically planned as a single visit, so photos and measurements up front really help. Then the right materials arrive with us.
- First we go through the drawings, schedule or specification for the seals.
- 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.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Before we start on site
- Tell us your opening times and when work is allowed
- Send any specification or drawings in advance
- Make sure the joints can be reached
Ask for a quote
A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or call 01277 525 020 or email the details over to discuss it first.
Advice
Looking after the joints
Cleaning and maintenance staff play a part too. Pass these on to them:
- Keep general-purpose fillers away from compartment walls
- Report damaged or disturbed seals as soon as they’re spotted
- Arrange inspection before areas are covered up
- Brief every trade that openings they make must be sealed
Never top up a fire seal with foam, ordinary silicone or filler. Repairs need the same product and detail as the original, or a new specification from the designer.
Regular walk-rounds of service areas are worth the time. Catching a damaged seal early keeps the fix small; found late, it can be one of many.
Fire stopping around Mop End: what changes locally
For England, the fire stopping of penetrations is dealt with in Approved Document B. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Our part stays the same: the specified product, installed to its tested detail. Mop End is about 27 miles from central London. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls, and the gaps need sealing with the specified product.
Older community buildings such as Church of the Holy Trinity that have been rewired or given new heating can have service gaps through walls worth checking against the specification. For an estates team at a campus like Buckinghamshire New University, which lies north-east of Mop End, summer M&E works are usually followed by a round of penetration sealing. For a school such as Curzon Church of England Combined School, penetration sealing fits best at the end of the summer works.
Mop End is about 3 miles west of Amersham, in Buckinghamshire. Across the HP7 postcode area, the process is the same: send details, get a fixed quote, we seal, and the work is guaranteed. 308 places across Buckinghamshire fall within our area, Mop End among them. For work in that direction, see our Reading page, about 20 miles away.
Business premises anywhere in HP7 are within our area. If your building is just outside Mop End, we cover Penn Street (1 mile south), Beamond End (1 mile west), Woodrow (1 mile south-east), Holmer Green (1 mile west) and Winchmore Hill (1 mile south-east). A short drive away, we cover Aylesbury (12 miles north-west), High Wycombe (4 miles south-west), Chesham (4 miles north-east), Marlow (8 miles south-west), Amersham (3 miles east) and Beaconsfield (4 miles south).
Around Mop End
Locally, jobs take us to sites close to The Squirrel pub and Holmer Green Senior School and the streets around them. The nearest railway station is Amersham station, about 2.6 miles east. Nearby you’ll also find Great Missenden (2.3 miles north-west) and Amersham Fair Organ Museum (3.1 miles east). The countryside around Mop End includes Gomm's Wood.
Honest limits
A proper diagnosis includes knowing what sealant can’t do. You’ll hear from us if the cause turns out to be one of these:
- Fire risk assessments, a job for a competent assessor
- Gaps in walls that were never built as compartment walls
- Plastic pipes whose detail calls for a collar or wrap
If in doubt, phone 01277 525 020 or send details through our quote form and we’ll say what we think before you book.
Surfaces we seal
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Cable penetrations
- Service gaps in risers
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
Questions about Mop End
Can you take on a job at a hospital such as Amersham Hospital?
Yes, hospitals are one of the sectors we cover. Work is phased so departments keep running, under the site’s own rules.
What happens to BS 476 references for fire stopping in Mop End?
From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
Can weather delay the job?
It can, when the joints are outside. Sealant won’t bond properly to a wet or frosty joint, so we watch the forecast and rearrange outside work if we have to. Internal work is far less affected.
Which sealant will you use?
The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
When can the area be used after sealing?
That comes down to the sealant and the temperature. Some take light use quickly, others need longer to cure, so we’ll confirm the curing time on the day.
What will the job cost?
That depends on the job: the volume of work, the access, the specified product and how it’s phased. Call for a quote.
Do you offer coloured sealant?
That depends on the product specified. Some ranges offer many colours, others very few, so we’ll confirm the colours available for the specified product with the quote.
Quoting for work in Mop End
To price the job, we consider:
- Distance, for remote addresses
- Phasing around occupants
- The site’s rules and procedures
- The size and state of each joint
Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote and we’ll put a fixed figure on it.
Before you send an enquiry
It doesn’t need to be a full survey. These details are enough to start:
- Approximate linear metres or a joint schedule
- The asbestos register, for older buildings
- The postcode of the building
- Anything awkward about access or site hours
Every quote starts with the facts: the joints involved, quantities, access and the product called for. Send what you have, and we’ll arrange a site visit if anything is unclear.
Different surfaces, different methods
Masonry and concrete
Openings through concrete vary from tidy cores to rough break-outs. Each gap is measured where it is widest so we know it sits within the tested range, and any outside it are raised with you.
Metal pipes
Copper and steel pipes are a common service penetration for fire-rated sealant. Pipe diameter, annular gap, sealant depth and any pipe insulation all have to match the detail.