Fire Stopping in Mashbury
Fire-rated and intumescent sealing of service penetrations and linear gaps across Mashbury, carried out by CSCS-carded applicators. Fully insured and CHAS accredited.
- Fire-stopping items raised at inspection or handover
- Openings left by services added after handover
- Fire sealant pulled out of the opening
Fire stopping in Mashbury
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Fire stopping in Mashbury
No fire sealant works on its own: 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. We work on linear gaps at wall heads, joints between fire-resisting walls and floors and service gaps in risers, and the usual reasons a site gets in touch are builders’ foam or ordinary silicone in compartment walls and improvised or mixed-product fire seals. Sealant applicators who only do sealant are a different proposition from a general trade with a gun in the van: on jobs in Mashbury, preparation and product choice get the time they need.
Around smaller places like Mashbury, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.
Guaranteed is the last step of every job. Our workmanship is backed for 12 months, and the quote explains what it covers.
- Place
- Mashbury (CM1)
- Region
- Essex
- Cover
- 12 months on every job
- Price
- Quoted before any work starts
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Maintenance after handover
Keep the joints in good shape with a few simple steps:
- Check risers and ceiling voids after each round of works
- Leave fire sealant to cure fully before covering it
- Brief every trade that openings they make must be sealed
- Keep general-purpose fillers away from compartment walls
Store the specified product details somewhere the next contractor can find them. Anyone resealing later needs to know which product and detail were used.
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.
When it isn’t the sealant
Before quoting, we check that sealant is the right answer. It won’t put right:
- Fire risk assessments, a job for a competent assessor
- Designing or specifying fire stopping, which sits with the designer or fire engineer
- Openings that need collars, wraps, batts or boards rather than sealant
Not sure which it is? You can call the office on 01277 525 020 or email the details over and we’ll tell you honestly.
Joints and surfaces we work on
- Pipe penetrations
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Linear gaps at wall heads
- Joints between fire-resisting walls and floors
- Service gaps in risers
How a job runs
When we get to site, we report to your site contact and complete whatever induction the building runs. Everything around the joints gets protected before any cutting starts, with the work itself normally taking longer where risers, ceiling voids or occupied floors have to be worked through in sequence. Smaller jobs around Mashbury can be grouped with others nearby, which keeps travel down. A fixed quote is given before anything starts.
- We ask for the product and detail your designer has specified.
- We sort the openings by the detail each one needs.
- Old or wrong materials are cut out.
- Mineral wool or other backing is fitted where required.
- We gun the sealant in to the specified depth around each service and tool it.
- We walk the completed areas with you and confirm the records agreed at quote stage.
Before we start on site
- Clear stock, furniture or equipment away from the joints
- Have the specification and drawings to hand
- Let us know about inductions and permits
Get a fixed quote
Need a figure for a tender or a budget? We’ll quote against your scope and drawings you can plan around. If you have questions first, call 01277 525 020 or email drawings and photos.
Advice
Should maintenance staff do it?
For most general trades, sealant is a sideline. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
Using site staff can make sense for a small touch-up, but anything bigger is another matter: a specialist brings efficiency, a consistent finish and a 12-month guarantee.
For managing agents and facilities managers
Agents, factors and owners’ representatives all follow the same route: send the details, accept a fixed quote, and we carry out and guarantee the work. Keys, access and contacts can be agreed in advance.
We take on planned maintenance as well as one-off repairs: resealing failed joints building by building, on a schedule that suits your budget. Sites in Mashbury can sit alongside others in a wider programme across Essex.
Fire stopping around Mashbury: points for this area
At about 29 miles from central London, Mashbury is within reach of the capital. Office refits around the commuter belt bring new cabling through fire-resisting walls; the gaps need the specified seal. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. 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. We install whatever has been specified, to the product’s tested detail.
At a university such as Writtle University College Cow Watering Campus, 3.8 miles south of Mashbury, labs, lecture blocks and residences are re-serviced often, so penetration seals are best checked after M&E work. Theatres, wards and plant rooms at sites like Broomfield Hospital, 3.3 miles east of Mashbury, all have compartment walls crossed by services. Older community buildings such as Mashbury Church that have been rewired or given new heating can have service gaps through walls worth checking against the specification.
Mashbury is about 5 miles north-west of Chelmsford, in Essex. Across the CM1 postcode area, the process is the same: details in, fixed quote out, then sealing and a 12-month guarantee. Mashbury is one of 644 places we cover in Essex for service penetrations. For work in that direction, see our London page, about 29 miles away.
Postcode districts covered here: CM1 for service penetrations. For a building on Mashbury Road and Barrack Road or nearby, we can quote for service penetrations. Sites close to Mashbury are covered too, including Good Easter (2 miles west), Chalk End (2 miles south-west), Boyton Cross (2 miles south), Roxwell (3 miles south) and Margaret Roding (3 miles west). Bigger towns within reach include Chelmsford (5 miles south-east), Basildon (15 miles south), Braintree (10 miles north-east), Harlow (12 miles west), Brentwood (12 miles south) and Maldon (13 miles east).
Around Mashbury
Mashbury’s nearest station is Chelmsford station, about 4.9 miles south-east of the centre. Well-known places in the area include Broomfield Hospital (3.3 miles east) and Willingale Doe (4.2 miles south-west). For a walk, there’s Little Waltham Meadows.
Mashbury: questions and answers
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Mashbury?
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.
Would you work within a site like Broomfield Hospital?
Yes, provided the work is planned with the site’s estates team. The estates team’s permit system and infection-control rules come first, and the work is planned around them.
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. We don’t remove asbestos-containing materials.
Do you seal on top of existing sealant?
No. We cut the old material out and clean the joint back before sealing, because fresh silicone will not bond with aged silicone.
How many days will you need on site?
It depends on the scope, but the work typically takes longer where risers, ceiling voids or occupied floors have to be worked through in sequence. Larger or phased jobs take longer, and we’ll give you a timescale with the quote.
Does weather matter for sealant work?
It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so external work may be moved if conditions aren’t right. Indoors, the weather is rarely a problem.
Are you CHAS accredited?
Yes. Mastic Doctor is CHAS accredited and a Constructionline member, which helps with supplier vetting.
What sets the cost
These are the things that shape the price:
- How accessible the joints are
- Location, for remote and island sites
- Whether old sealant has to be cut out first
- Joint width, depth and condition
What a job costs comes down to the quantity of joints, what has to come out first and how the joints are reached. Call for a quote once you have the details.
Before you send an enquiry
For an accurate fixed quote, we need a clear picture of the site. Useful things to include:
- A wide shot and a close-up of the area
- Drawings or a marked-up plan, if available
- Whether the building will be occupied during the work
- Any specification or named product
Send details, get a quote, we seal, guaranteed: that’s how every job runs. To take the first step, speak to us on 01277 525 020 or send photos by email.