Fire Stopping in Longstock
Commercial sealant work in Longstock for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, with a fixed quote first.
- Snag lists that include open service penetrations
- Head-of-wall gaps with no fire seal
- Openings left by services added after handover
Fire stopping for businesses in Longstock
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Compartment walls and floors in Longstock
In England, Approved Document B covers fire stopping of openings and penetrations. Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. Either way, we install the specified product to its tested detail. Longstock is about 65 miles from central London. Office refits around the commuter belt bring new cabling through fire-resisting walls.
In a hotel such as Sheriff House Hotel, which lies south of Longstock, new pipework or cabling through bedroom and corridor walls needs sealing with the specified product. In a school such as Test Valley School, fire-rated sealant goes in around service penetrations where it is specified.
Longstock is about 5 miles south of Andover, in Hampshire. Commercial clients in Longstock can call on us for service penetrations. Across Hampshire, 723 places are covered, Longstock among them. There’s a separate page for Southampton, about 15 miles away.
If you need fire stopping in SO20, the process matches everywhere else we work: details, then a fixed price, then sealing and a 12-month guarantee. Close to Longstock, our area also takes in Leckford (1 mile east), Stockbridge (1 mile south), Fullerton (2 miles north-east), Cottonworth (2 miles north-east) and Chilbolton (3 miles north-east). A short drive away, we cover Winchester (9 miles south-east), Eastleigh (13 miles south-east), Andover (5 miles north), Totton (15 miles south), Chandler's Ford (11 miles south-east) and Romsey (10 miles south).
Local landmarks in Longstock
Locally, jobs take us to sites close to Longstock Park and The Peat Spade Public House and the streets around them. Well-known places in the area include Andover War Memorial Hospital (5.8 miles north). Not far away are Mill Lake.
Fire stopping for commercial buildings in Longstock
Where pipes, cables and other services cross a compartment wall or floor, the opening around them has to be closed so fire and smoke can’t move between compartments. Our job is fitting fire-rated and intumescent sealant at those service penetrations, and along linear gaps, where it is the specified product. We work to the product’s tested detail for every seal. If you’re dealing with openings found when ceilings come down for a refit and fire stopping installed outside its tested range, we can put it right. Looking for mastic applicators who cover Longstock? Mastic Doctor has worked for contractors, FMs and building owners since 2005, with CSCS-carded applicators.
A job near Longstock is usually planned around one visit, with the specification and photos sent in advance. Design and sign-off belong to the designer or building control; we install what’s specified.
We sign every job off with a 12-month guarantee. It’s a plain promise: if the work we did fails within twelve months, we return to fix it.
- Place
- Longstock (SO20)
- Region
- Hampshire
- Cover
- A 12-month guarantee
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
What sets the cost
Your fixed quote is built from the real scope. It takes account of:
- Induction, permit and paperwork requirements
- Phasing around occupants
- Access and working height
- Removal of failed or old sealant
Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Tell us how the joints are reached and call for a quote.
Before you send an enquiry
Whether it’s one area or a whole building, the same details help:
- A wide shot and a close-up of the area
- How the joints are reached, and at what height
- Approximate linear metres or a joint schedule
- Where the site is, with the postcode
Need a figure for a tender or a budget? Send the scope and any drawings, and we’ll return a fixed quote you can plan around. For a chat about it beforehand, call the office on 01277 525 020 or email a schedule or drawings.
What sealant work can’t fix
Honesty saves time and money. New sealant won’t cure:
- Fire risk assessments, a job for a competent assessor
- Openings that need collars, wraps, batts or boards rather than sealant
- Gaps in walls that were never built as compartment walls
If you’re not sure, just give us a call on 01277 525 020 or send photos by email and we will give you a straight answer.
Where we work in Longstock
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Service gaps in risers
- Cable penetrations
- Small duct penetrations where the tested detail allows
- Linear gaps at wall heads
Places near Longstock
Also in Longstock
What the job involves on each surface
Linear joints
Linear joints run along the head of a wall, at a slab edge or between two fire-resisting elements. BS EN 1366-4 testing sets the joint widths, depths, backing and movement a seal covers, and we work within it.
Metal pipes
Metal pipes conduct heat, so their details often call for extra measures along the pipe. If the detail needs something beyond sealant, we tell you.
Longstock: questions and answers
Can you take on a job at a hospital such as Andover War Memorial Hospital?
Yes. We work in healthcare settings as well as offices and schools. Each area is agreed with the ward or department and the estates team in advance.
What does the BS 476 change mean for fire-rated sealant in Longstock?
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.
How do I request a quote?
It works in four steps: send details, get a quote, we seal, guaranteed. The first step only needs photos and a postcode.
How much does the work cost?
We don’t publish prices, as every site differs. Send photographs or drawings and we’ll price it at a fixed figure.
Can weather delay the job?
It can, for external work. 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.
Do you take on multi-site work?
Yes. Multi-site work and planned programmes are a core part of the service, with each site phased to suit its occupants.
Do you seal on top of existing sealant?
No, never. Sealing over old material is one of the classic causes of early joint failure, so it all comes out first.
Our process
At the end of each section, the masking comes off, the area is cleaned and every joint is checked, ready for your sign-off. If an area should be left alone while the sealant cures, we say how long and put signs out. If others near Longstock need work, visits can be combined. You’ll have a fixed quote before work 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.
- Where the detail needs backing, it goes in at the stated depth.
- Fire-rated or intumescent sealant goes in around the services and is tooled off.
- Completed areas are checked with you, with the records agreed when we quoted.
Preparing the site
- Send your site hours and access windows
- Make sure the joints can be reached
- Tell us what induction or permit system the site runs
Request a quote
The quickest route to a quote is a few photos and the site postcode. Send them through the quote form, or call 01277 525 020 or email us if you’d rather talk the job through.
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Maintenance after handover
Cleaning and maintenance staff play a part too. Share these points with them:
- Keep general-purpose fillers away from compartment walls
- Settle who seals which penetrations at the start of a project
- File the specified details where the next contractor can find them
- Treat an open penetration as a priority repair
After every round of M&E works, check that the openings created have been sealed. Building it into each contractor’s sign-off keeps the walls intact.
A simple record of seal locations and products helps. It tells the next contractor exactly what to reinstate, which saves guesswork.
Signs you need fire stopping in Longstock
Plenty of openings were simply never closed, often hidden above suspended ceilings or behind boxing. They come to light during inspections, refits or when another trade lifts a tile.
What tends to prompt an enquiry:
- Old intumescent sealant that has split away
- Unsealed openings around new pipes and cables
- Seals disturbed by maintenance and left open
- Snag lists that include open service penetrations
Theatres, wards and plant rooms at sites like Andover War Memorial Hospital, 5.8 miles north of Longstock, all have compartment walls crossed by services.
Questions to ask before you book
- How long is the guarantee, and what does it include?
- Their pre-qualification and accreditations
- Is depth set with backing rod, or bond-breaker tape in shallow joints?
- How they handle RAMS and site documents