Fire Stopping in Chalk
Planning work on a service penetration in Chalk? We look at it, seal it with the right product and hand it over with a 12-month guarantee.
- Openings left by services added after handover
- Builders’ foam or ordinary silicone in compartment walls
- Improvised or mixed-product fire seals
Fire stopping in Chalk
Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.
Common questions from Chalk clients
How does the move away from BS 476 affect penetration seals in Chalk?
Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes the route, subject to transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
Do you cover business parks and estates near Chalk, such as Lion Business Park?
Yes, sites like Lion Business Park are within our area, along with the rest of Chalk. To start, just call 01277 525 020 or email us with the unit, the joints involved and your access times.
What if there’s asbestos in the old mastic?
Managing asbestos is the dutyholder’s responsibility, so we will ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.
How do I request a quote?
There are four steps: send details, get a quote, we seal, guaranteed. Step one needs little more than photos and a postcode.
Will you come and look before quoting?
That depends on the size and complexity of the job. Simple work can often be priced from photographs, and bigger or more complex jobs usually get a visit.
Can you handle several sites?
Yes. Multi-site work and planned programmes are a core part of the service, planned site by site to suit how each building is used.
Which sealant will you use?
Where there’s a specification, we use the product it names. Otherwise, we recommend a product to suit the joint’s movement, the substrate and the conditions, following the manufacturer’s guidance.
Fire stopping for commercial buildings in Chalk
Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4 and the results are classified to BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. So our job is to reproduce that arrangement faithfully. If you are dealing with unsealed openings around new pipes and cables and fire stopping installed outside its tested range, we can put it right. Most enquiries from Chalk start with one failed joint and grow into a wider look at the building: we look at the rest while we’re there and tell you what we find.
Around smaller places like Chalk, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. Any service penetration through those walls should be closed with the specified product, set out as its test evidence shows.
A 12-month guarantee applies to all our work in Kent. Should something we installed fail, give us a call on 01277 525 020 or send details through our quote form and we will come back to it.
- Where
- Chalk (DA12)
- Wider area
- Kent
- Cover
- A 12-month guarantee
- Price
- Fixed quote, scope in writing
- Call
- 01277 525 020
- Last updated
- 3 November 2026
When something else is needed
We check first that sealant really is the fix. It isn’t the answer for:
- Plastic pipes whose detail calls for a collar or wrap
- Fire doors, dampers or other fire safety equipment
- Signing off or certifying a building’s fire stopping
If in doubt, call the office on 01277 525 020 or send photos by email and we will say what we think before you book.
Joints and surfaces we work on
- Joints between fire-resisting walls and floors
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Pipe penetrations
- Linear gaps at wall heads
- Service gaps in risers
Looking after the joints
For the best life from the joints:
- Flag new cables with no seal around them
- Have penetrations checked while they can still be seen
- Keep product data and details in the fire safety file
- Settle who seals which penetrations at the start of a project
New services after handover are a common way fire stopping gets breached. A short check at the end of each job saves a long hunt later.
Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job compared with dozens found at once.
What happens if it’s left?
Sealing behind the M&E trades area by area beats a sweep at the end. While the area is still open, every opening is easy to see and reach and each detail can be checked as we go. For buildings around smaller places like Chalk, water damage can go unnoticed for longer, especially where a building isn’t used daily, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.
Pricing service penetrations depends on quantities, condition and access, and any specification that applies. Ask us for a fixed quote.
Why choose Mastic Doctor in Chalk
- One phone line for London, the South East and Scotland
- Constructionline member
- Products installed to the manufacturer’s instructions
- CHAS accredited contractor
Read how commercial sealant jobs are priced and our accreditations and insurance.
What affects the price in Chalk
Each job is priced on its own details. The main factors are:
- Distance, for remote addresses
- The total length or number of joints
- Access and working height
- The product specified
No two sites price the same: joint size, product, access and site hours all play a part. Send the details and a fixed figure follows.
Before you send an enquiry
We can often quote from photos and a few details. It helps to include:
- How the joints are reached, and at what height
- Whether the building will be occupied during the work
- Your programme or deadline
- Where the site is, with the postcode
If there’s a specification, drawings or a tender package, send it with your enquiry, and we’ll price the work to it. Smaller jobs need nothing more than photos and a few notes.
Where services cross fire walls in Chalk
Chalk lies roughly 22 miles out from central London. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls. A 2-mile radius around Chalk takes in several hotels. In hotels, bedroom and corridor walls are normally fire-resisting, so services added in a refit need sealing with the specified product.
In a building such as Church of St Mary, any service penetration through a fire-resisting wall should be sealed to the specified detail. In a retail centre such as Imperial Retail Park, which lies north-west of Chalk, any fire-resisting wall between units that is crossed by new services needs sealing to the tested detail. Tenant changes at parks like Lion Business Park (to the north-west of Chalk) bring new data and services, and openings through fire-resisting walls need the specified seal.
Chalk is about 1 mile east of Gravesend, in Kent. Any commercial site in Chalk is covered. Our Kent coverage takes in 931 places. There’s a separate page for London, roughly 22 miles from Chalk.
Business premises anywhere in DA12 are within our area. If your site is on Chalk Road, Castle Lane and Orlick Road or close by, we can quote for service penetrations. Just outside Chalk, we also work in Upper Ifield (1 mile south), Thong (1 mile south), Shorne (1 mile south-east), Shorne Ridgeway (2 miles south-east) and Higham (2 miles south-east). Bigger towns within reach include Maidstone (12 miles south-east), Sittingbourne (15 miles south-east), Dartford (8 miles west), Sevenoaks (14 miles south-west), Northfleet (3 miles west) and Swanley (10 miles west).
Around Chalk
Around Chalk, our work takes us to commercial buildings near Shorne Woods Country Park, Westcourt Primary School and St John's Catholic Comprehensive, among other places. Chalk’s nearest station is Gravesend station, roughly 2 miles west. Other landmarks nearby include Rochester Castle (4.8 miles south-east) and Gravesham Museum (1.9 miles north-west). For a walk, there’s Gad's Hill and Rede Common.
From enquiry to sign-off
At the end of each section, we remove the tape, clean down and inspect every joint with your site contact. Where the sealant needs time to cure before use, we tell you and sign the area. Jobs in and around smaller places like Chalk are normally planned as a single visit, so we ask for photographs and rough sizes first. That way the right products come on the day.
- We read the specification, drawings or penetration schedule you send.
- 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.
- Mineral wool or other backing goes in wherever the detail asks.
- 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.
Getting the site ready
- Let building users know which areas are affected
- Tell us which areas need to stay in use
- Tell us your opening times and when work is allowed
Get a fixed quote
A handful of photos and a postcode is the fastest way to a quote. Send them through the quote form, or give us a call on 01277 525 020 or use the quote form to discuss it first.
Advice
What the job involves on each surface
Linear joints
Head-of-wall gaps, slab edges and wall junctions are linear joints. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers.
Cables and cable bundles
Single cables and small bundles are often within a fire-rated sealant’s tested detail. Bundle size, cable type and the space between cables all matter and we work within those limits.