Fire stopping in Long Crendon
Fire-rated and intumescent sealing of service penetrations and linear gaps across Long Crendon, by CSCS-carded applicators. CHAS accredited and fully insured.
- Fire-rated sealant that has cracked or shrunk back
- Unsealed joints where partitions meet the slab
- Builders’ foam or ordinary silicone in compartment walls
Fire stopping for Long Crendon sites
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Compartments and services around Long Crendon
Central London is about 43 miles from Long Crendon. 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. Fire stopping of openings and penetrations in England falls under Approved Document B. 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. Our part stays the same: the specified product, installed to its tested detail.
Older community buildings such as Church of St Mary that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Holiday works at schools like Long Crendon School often leave service openings to seal before pupils return.
Long Crendon is about 2 miles north-west of Thame, in Buckinghamshire. Our applicators travel to Long Crendon for work on service penetrations. Long Crendon is one of 308 places we cover in Buckinghamshire for service penetrations. Sites around Oxford have their own page, about 10 miles away.
Commercial sites across HP18 are covered for service penetrations. Streets here include High Street, The Square and Giffard Way, and sites on any of them can send details for a fixed quote. We also cover Chearsley (2 miles north-east), Thame (2 miles south-east), Moreton (3 miles south), Haddenham (3 miles east) and Cuddington (3 miles north-east) for service penetrations. Nearby towns on our patch include Aylesbury (8 miles east), High Wycombe (15 miles south-east), Buckingham (15 miles north), Elmhurst (9 miles north-east), Southcourt (8 miles east) and Princes Risborough (8 miles south-east).
Near you in Long Crendon
Around Long Crendon, our work takes us to commercial buildings near Lord Williams's School and The Eight Bells Public House. For rail, the closest station is Haddenham & Thame Parkway station, roughly 2.3 miles east of the centre. Other landmarks nearby include Dinton Castle (4.7 miles east) and Thame Community Hospital (2.4 miles south-east). The countryside around Long Crendon includes Snakemoor.
About our fire stopping in Long Crendon
Sealant is the specified answer for plenty of openings, such as metal pipes, cables and some small ducts where the detail covers them. Other openings need collars, wraps, batts, pillows or boards. If the detail calls for something other than sealant, we say so rather than force sealant into it. Site teams most often ask us about snag lists that include open service penetrations and head-of-wall gaps with no fire seal, on small duct penetrations where the tested detail allows, cable penetrations and pipe penetrations. Searching for sealant specialists in Long Crendon? Mastic Doctor has worked for contractors, FMs and building owners since 2005, CHAS accredited and a Constructionline member.
Converted and extended buildings around places like Long Crendon can mix old and new construction, so it’s worth confirming the wall or floor type before choosing the seal. We match the product to the substrate and service, and say so if a collar, wrap or batt is the specified item.
Every job we finish is backed by a 12-month workmanship guarantee, wherever the site is. If a joint we sealed fails because of how it was installed, we come back and put it right.
- Location
- Long Crendon (HP18)
- Wider area
- Buckinghamshire
- Cover
- 12 months on every job
- Quote
- Quoted before any work starts
- Phone
- 01277 525 020
- Updated
- 3 November 2026
How a job runs
Site rules come first: signing in, inductions and any permit to work. Once we are cleared to begin, the joints are worked through in the order agreed with your site contact. Work in places the size of Long Crendon is planned as a single visit where we can. Photos with rough sizes let us arrive with everything needed.
- 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.
- The specified backing and sealant go in to depth and are finished neatly.
- We tell you about openings that need a different product.
Before we start on site
- Tell us your opening times and when work is allowed
- Flag any permit to work we will need
- Point out any areas we must not close
Get a fixed 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.
Advice
Do you need fire stopping in Long Crendon?
Linear gaps fail where a fire-resisting wall meets a slab, soffit or another wall. Movement in the frame or slab can open the joint. The tested detail for a linear joint states the width and movement it covers.
Clients normally get in touch after noticing something like this:
- Head-of-wall gaps with no fire seal
- Snag lists that include open service penetrations
- Unsealed penetrations discovered above suspended ceilings
- Fire stopping installed outside its tested range
For a hospital such as Thame Community Hospital, which lies south-east of Long Crendon, penetration sealing is typically phased ward by ward, with infection-control rules agreed first.
Before you book anyone
- The named product and why it was chosen
- Do they follow the manufacturer’s priming guidance?
- Their public liability cover
- What the guarantee covers, and for how long
Looking after the joints
A few simple habits keep the new joints working:
- Foam or ordinary sealant is never a fire-seal repair
- Make fire stopping part of every scope that crosses a fire-resisting wall
- Check with the data sheet before painting over fire sealant
- Flag new cables with no seal around them
After the work, brief anyone else working in the area that the openings are now sealed. Any seal cut back for a new service needs reinstating to its tested detail, by someone who knows the system.
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.
What the job involves on each surface
Cables and cable bundles
Data cabling added after handover is a regular cause of open service penetrations. We reseal around them to the specified detail.
Masonry and concrete
Block walls and concrete floors are common substrates for penetration seals. Dust and loose debris are cleared out of the opening, with backing added if the detail requires it.
Other services in Long Crendon
Long Crendon: questions and answers
Can you work at a site such as Crendon Industrial Estate, by Long Crendon?
Yes, sites like Crendon Industrial Estate are within our area, along with the rest of Long Crendon. To start, just give us a call on 01277 525 020 or send photos by email with the unit, the joints involved and your access times.
Is a hospital such as Thame Community Hospital somewhere you can work?
Yes. We work in healthcare settings as well as offices and schools. Before anything starts, the estates team agrees permits, inductions and infection-control measures with us.
Who decides which product is used?
Where there’s a specification, we use the product it names. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.
What about RAMS and site documents?
Each site asks for different documents, so list what you need, whether RAMS, insurance or CSCS details, and we’ll confirm with the quote.
What does an EI 60 rating mean?
Penetration seals are tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. Classification follows BS EN 13501-2. That rating only holds when the product is installed to its tested detail.
Is sealant suitable for all service openings?
No. Each fire-rated sealant is tested for particular services, gap sizes and substrates. If an opening falls outside, it needs another solution.
What changes on 2 September 2029?
From 2 September 2029, Approved Document B in England drops its references to BS 476 classes. The European route, BS EN 13501-2, then applies. Your designer will choose products with the right evidence.
When it isn’t the sealant
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Walls or floors that aren’t fire-resisting to begin with
- Deciding what a wall or floor needs, which belongs to the designer
- Plastic pipes whose detail calls for a collar or wrap
Not sure which it is? You can speak to us on 01277 525 020 or email us and we’ll tell you honestly.
Surfaces we seal
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Pipe penetrations
What affects the price in Long Crendon
What shapes the price:
- Which sealant the job calls for
- Removal of failed or old sealant
- The site’s rules and procedures
- Location, for remote and island sites
Quantities, awkward access and phased working all shape the price. Site requirements like inductions and permits play a part as well, along with the time of year for external work.
What to include in your enquiry
The more we know, the firmer the quote. Helpful details to send:
- Your programme or deadline
- The postcode of the building
- How the joints are reached, and at what height
- Approximate linear metres or a joint schedule
Pricing a project or setting a maintenance budget? Send the scope and any drawings, and we’ll return a fixed quote that you can work with. For a chat about it beforehand, ring 01277 525 020 or email us.