Fire stopping in North Waltham
Fire-rated and intumescent sealing of service penetrations and linear gaps in North Waltham. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.
- Old intumescent sealant that has split away
- Open linear gaps along the top of fire-resisting walls
- Non-fire-rated filler around services
Fire stopping in North Waltham
Photos, a specification or a quick description of the joints is enough to start a fixed quote.
Keeping the joints sound
Keep the joints in good shape with a few simple steps:
- Get seals inspected before ceilings and boxing close
- Flag new cables with no seal around them
- Put resealing into every M&E and fit-out package
- Settle who seals which penetrations at the start of a project
Keep the product data and installation details with the building’s fire safety information. It makes later repairs much easier to match.
Ask every contractor who works in risers or voids to report openings they create. Small habits like this stop openings building up.
About our fire stopping in North Waltham
Every service that crosses a compartment wall or floor leaves an opening, and that opening needs sealing to hold back fire and smoke. Our part is installing fire-rated and intumescent sealant at those openings and along linear gaps, where the specification calls for it. We work to the product’s tested detail for every seal rather than guesswork. If you are dealing with fire-rated sealant that has cracked or shrunk back and builders’ foam or ordinary silicone in compartment walls, we can put it right. Sealant contractors, mastic applicators, sealant specialists: whatever the job title on the order, in North Waltham it comes down to the same thing: failed joints cut out, faces prepared and the right sealant laid to the right depth.
For a smaller site near North Waltham, we plan to do all the penetrations in one go, so send the specification and photographs first. Design and sign-off belong to the designer or building control; we install what’s specified.
Every job we finish is backed by a 12-month workmanship guarantee. If our installation lets you down in that time, we return and fix it.
- Where
- North Waltham (RG25)
- Wider area
- Hampshire
- Guarantee
- A 12-month guarantee
- Quotes
- Quoted before any work starts
- Call
- 01277 525 020
- Updated
- 3 November 2026
Our process
We follow your site rules from the start: sign-in, induction and whatever permit system the building uses. Once we’re cleared to begin, we take the joints in the sequence agreed with you. Smaller jobs around North Waltham 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.
- Openings are measured and grouped by detail.
- 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
- Explain the parking and delivery arrangements
- Confirm the product named in the specification
- Send your site hours and access windows
Getting a fixed quote
A good quote starts with a clear picture: the joints involved, quantities, access and the product called for. Share whatever details you have and we’ll fill any gaps with a visit.
Related advice
Doing it in-house
The visible bead is only part of the job. Correct depth, the right primer and a sealant matched to the movement are easy to get wrong without experience.
General builders and handymen seal joints, but it isn’t their main trade. A specialist prepares properly, controls joint depth and picks a product with the right movement class, which is what makes a joint last.
Places near North Waltham
Also in North Waltham
North Waltham: questions and answers
Is North Waltham off your patch?
No. Places such as North Waltham are covered as much as the big towns. We work across Greater London and the South East. Good photos up front let us bring everything on the first visit.
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in North Waltham?
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. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.
How long before the joints can be used?
The product and site conditions decide that. Some take light use quickly, others need longer to cure, and we confirm it before leaving site.
Which sealant will you use?
The specification comes first, if there is one. Without one, the joint decides: its movement, its surfaces and what it has to cope with.
How long will the new sealant last?
Nobody can honestly give a figure in years, since movement, weather, cleaning and use all affect it. Regular inspection is the best way to catch problems early.
Do you seal on top of existing sealant?
No. Failed sealant is removed and the faces cleaned back to sound, dry material first, because fresh silicone will not bond with aged silicone.
Do you need to see the site first?
Photos, drawings or a schedule are often enough to quote. If the job needs a look first, we’ll arrange a visit before quoting.
What we can’t put right
We seal joints; we don’t mend everything behind them. On its own, sealant can’t deal with:
- Gaps in walls that were never built as compartment walls
- Reviewing a building’s overall fire safety
- Issuing fire ratings or certificates for seals
If in doubt, call the office on 01277 525 020 or email a schedule or drawings and we’ll say what we think before you book.
Joints and surfaces we work on
- Linear gaps at wall heads
- Service gaps in risers
- Cable penetrations
- Pipe penetrations
- Small duct penetrations where the tested detail allows
- Joints between fire-resisting walls and floors
Service penetrations in North Waltham buildings
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. Our part stays the same: the specified product, installed to its tested detail. Central London is about 51 miles from North Waltham. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.
For a school such as North Waltham Primary School, penetration sealing fits best at the end of the summer works. Older community buildings such as Church of St. Michael's that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Wherever services are added at a hospital such as Park Prewett Hospital, 5.6 miles north-east of North Waltham, the compartment line has to be made good with the specified product.
North Waltham is about 5 miles south-west of Basingstoke, in Hampshire. Commercial clients in North Waltham use us for work on service penetrations. We work across 723 places in Hampshire, from busy centres to rural villages. We also cover Reading, some 19 miles away.
Commercial sites across RG25 are covered for service penetrations. Among the streets we cover are Church Road, Chapel Street and Cuckoo Close. Just outside North Waltham, we also work in Dummer (2 miles east), Oakley (3 miles north), Kempshott (3 miles north-east), Newfound (3 miles north) and Farleigh Wallop (4 miles east). A short drive away, we cover Basingstoke (5 miles north-east), Winchester (12 miles south-west), Andover (12 miles west), Alton (10 miles south-east), Tadley (10 miles north) and Hook (11 miles north-east).
What’s near North Waltham
In North Waltham, that means premises near The Fox pub, among other places. North Waltham’s nearest station is Micheldever station, about 3.6 miles south-west. Other landmarks nearby include Park Prewett Hospital (5.6 miles north-east). Not far away are Farleigh Hill.
Different surfaces, different methods
Masonry and concrete
Core-drilled holes are neat; broken-out ones rarely are. Each gap is measured where it is widest so we know it sits within the tested range.
Risers and ceiling voids
Voids hide a lot of unsealed openings. We work through the areas on your schedule methodically and tell you about openings outside the list.
What sets the cost
Sealant work doesn’t have a standard rate, since sites vary so much. What we look at:
- Which sealant the job calls for
- The total length or number of joints
- Whether the work must be split into stages
- Any access equipment needed
Pricing service penetrations depends on quantities, condition and access, plus any specification you are working to. Call for a quote.
Sending details for a quote
Diagnosis starts before we arrive. Let us know:
- When you need the work done
- The postcode of the building
- How the joints are reached, and at what height
- Specification clauses that apply
Quotes are fixed against the scope you send, so the cost is agreed before work starts. To ask for one, call 01277 525 020 or use the quote form.