Fire Stopping in Blackmoor
Fire-rated and intumescent sealing of service penetrations and linear gaps throughout Blackmoor and nearby, by CSCS-carded applicators. CHAS accredited and fully insured.
- Builders’ foam or ordinary silicone in compartment walls
- Improvised or mixed-product fire seals
- Openings found when ceilings come down for a refit
Fire stopping in Blackmoor
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
About our fire stopping in Blackmoor
We should be clear about what we do and don’t do. The designer, fire engineer or building control decides which fire stopping is required; sign-off sits with them too. What we bring is careful installation of the specified sealant, to the maker’s guidance on buildings around Blackmoor. We work on service gaps in risers, cable penetrations and linear gaps at wall heads, and the usual reasons a site gets in touch are snag lists that include open service penetrations and fire sealant pulled out of the opening. A specialist sealant contractor works differently from a general builder: on jobs in Blackmoor, preparation and product choice get the time they need.
Barn and farm-building conversions near places like Blackmoor often combine new partitions with old walls. A penetration seal only performs as tested if product, substrate, service, gap and depth all match the detail.
We sign every job off with a 12-month guarantee. The promise is simple: if our work fails within that year, we put it right.
- Place
- Blackmoor (GU33)
- Region
- Hampshire
- Guarantee
- 12 months on our workmanship
- Quote
- A fixed quote before we start
- Phone
- 01277 525 020
- Last updated
- 3 November 2026
From enquiry to sign-off
Occupied buildings need a little choreography. We sign and contain the area we are in, with routes through the building left open and work section by section so the rest of the building stays in use. Rural sites near Blackmoor may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
- Every penetration is compared with its detail: wall or floor type, service, gap size and depth.
- Anything that doesn’t belong in the opening, such as expanding foam or general-purpose filler, is removed.
- 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.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Preparing the site
- For older buildings, check the asbestos register before work
- Have the specification and drawings to hand
- Make sure the joints can be reached
Getting a fixed quote
Every job follows the same four steps: send details, get a quote, we seal, guaranteed. The first step is to call the office on 01277 525 020 or send details through our quote form with what you know.
Related advice
Compartment walls and floors in Blackmoor
Central London is about 44 miles from Blackmoor. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls. Approved Document B is the English guidance that covers fire stopping around openings and penetrations. 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.
Large healthcare estates like Chase Hospital, 1.4 miles north-east of Blackmoor, change their services often, so penetration seals are worth checking after M&E work. Industrial units on estates such as Southlands Industrial Park, 0.9 miles north-west of Blackmoor, often separate offices from warehouse space with fire-resisting walls, and new services through them need the specified seal.
Blackmoor is about 5 miles south-east of Alton, in Hampshire. Anywhere in GU33, it works the same way: send details, get a fixed quote, we seal, and the work is guaranteed. Across Hampshire, 723 places are covered, Blackmoor among them. Portsmouth is covered too, around 21 miles from Blackmoor.
Business premises anywhere in GU33 are within our area for service penetrations. We cover commercial and managed buildings on Blackmoor Road and Sotherington Lane and the roads nearby. Close to Blackmoor, our area also takes in Woolmer (1 mile south-east), Greatham (1 mile south), Longmoor (2 miles south-east), Passfield (2 miles east) and Weavers Down (3 miles south-east). Further afield, our area takes in Basingstoke (15 miles north-west), Farnborough (15 miles north), Fleet (13 miles north), Horndean (14 miles south-west), Aldershot (12 miles north-east) and Alton (5 miles north-west).
What’s near Blackmoor
In Blackmoor, that means premises near Mill Chase Academy. For rail, the closest station is Liss station, about 3.5 miles south of the centre. A little further out are The Romany Museum (2.3 miles west) and Chase Community Hospital (1.4 miles north-east). Open spaces near Blackmoor include Selborne Hill and Deadwater Valley.
What sealant work can’t fix
We seal joints; we don’t mend everything behind them. Sealant alone won’t deal with:
- Fire risk assessments, a job for a competent assessor
- Walls or floors that aren’t fire-resisting to begin with
- Designing or specifying fire stopping, which sits with the designer or fire engineer
Not sure which it is? You can ring 01277 525 020 or use the quote form and we’ll tell you honestly.
Joints and surfaces we work on
- Small duct penetrations where the tested detail allows
- Service gaps in risers
- Cable penetrations
- Pipe penetrations
- Joints between fire-resisting walls and floors
- Linear gaps at wall heads
Also in Blackmoor
Common problems we fix in Blackmoor
Some service penetrations were never sealed at all, often hidden above suspended ceilings or behind boxing. Inspections, refurbishments and ceiling access normally bring them to light.
If one of these sounds familiar, it’s time for a closer look:
- Non-fire-rated filler around services
- Service penetrations left open after M&E works
- Seals disturbed by maintenance and left open
- Openings found when ceilings come down for a refit
In a building such as St Matthew's Church, any service penetration through a fire-resisting wall should be sealed to the specified detail.
Before you book anyone
- Do they follow the manufacturer’s priming guidance?
- Is the sealant right for the movement and the substrate?
- Will RAMS and insurance details be available?
- What the guarantee covers, and for how long
Why it’s worth doing now in Blackmoor
The longer openings stay, the more there tend to be: every new cable or pipe adds another. Keeping on top of it after each round of works keeps the job small. Around Blackmoor, it’s better to renew all the failing joints at once. Photos of every joint help us quote for the whole job.
Quantities, awkward access and phased working all shape the price. So do site requirements such as inductions and permits, along with the time of year for external work.
Why appoint us
- A Constructionline member, so easy to vet
- One contact handling all your sites
- Work carried out by CSCS-carded applicators
- Joints cleaned back to sound surfaces
Read our cost guide and how we’re accredited.
Looking after the joints
For the best life from the joints:
- Keep general-purpose fillers away from compartment walls
- Flag new cables with no seal around them
- Arrange inspection before areas are covered up
- Ask which product is in place before decorating
New services after handover are a common way fire stopping gets breached. Building it into each contractor’s sign-off keeps the walls intact.
Ask every contractor who works in risers or voids to report openings they create. It costs little and catches breaches early.
Surface by surface
Masonry and concrete
Many seals are made in blockwork, brickwork or concrete slabs. Dust and loose debris are cleared out of the opening, so the sealant and any backing sit properly.
Linear joints
Head-of-wall gaps, slab edges and wall junctions are linear joints. Their tested detail, under BS EN 1366-4, sets the width, depth, backing and movement allowed and the installation has to fit inside those limits.
Questions we’re asked in Blackmoor
Would you work within a site like Chase Hospital?
Yes, healthcare and care buildings are part of our work. We follow the site’s permits, sign-in and infection-control procedures in every area.
What does the BS 476 change mean for fire-rated sealant in Blackmoor?
References to BS 476 classes are being removed from Approved Document B from 2 September 2029, after which BS EN 13501-2 classification is the route, subject to transitional arrangements. Our part doesn’t change: the specified product, to its tested detail.
When can the area be used after sealing?
Curing time varies by product, and we confirm it on the day, and sign any area that should be left alone.
Can the building stay open while you work?
Yes, as long as we plan it. Tell us your site hours and access windows and we’ll plan around them.
How long will the new sealant last?
There’s no fixed lifespan: movement, exposure, cleaning, traffic and the product all play a part. Treat them as maintenance items and inspect them regularly.
Can you follow the specification on our project?
Yes. Send it with your enquiry, and we’ll price the work to it, flagging anything that needs clarifying.
Do you offer coloured sealant?
Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We’ll confirm the colours available for the specified product.