Fire-rated sealing and fire stopping in Long Sutton, Hampshire
Looking for fire stopping in Long Sutton? It’s simple: send details, get a quote, we seal, guaranteed.
- Non-fire-rated filler around services
- Fire-rated sealant that has cracked or shrunk back
- Fire seals cut back for extra cables and never reinstated
Fire stopping in Long Sutton
Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.
Fire stopping for commercial buildings in Long Sutton
The test standards are BS EN 1366-3 for penetration seals and BS EN 1366-4 for linear joints. That classification, such as EI 60 or EI 120, belongs to the product in its tested arrangement. Reproducing the tested arrangement on site is the part we take care of. Site teams most often ask us about openings left by services added after handover and old intumescent sealant that has split away, on small duct penetrations where the tested detail allows, cable penetrations and joints between fire-resisting walls and floors. Whoever orders the work in Long Sutton, the brief is normally the same: a fixed quote, no surprises on site and a 12-month guarantee behind the result.
A job near Long Sutton is usually planned around one visit, so send the specification and photos first. We install to the specification and the manufacturer’s guidance, leaving design and sign-off with the designer and building control.
Work we carry out comes with a 12-month guarantee. Should something we installed fail, phone 01277 525 020 or email the details over and we’ll come back to it.
- Where
- Long Sutton (RG29)
- Wider area
- Hampshire
- Guarantee
- 12 months on every job
- Quotes
- Fixed quote, scope in writing
- Telephone
- 01277 525 020
- Last updated
- 3 November 2026
Where services cross fire walls in Long Sutton
Approved Document B is the English guidance that covers fire stopping around 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 Its BS 476 references are being withdrawn from 2 September 2029, with BS EN 13501-2 classification taking over, subject to transitional arrangements. We install whatever has been specified, to the product’s tested detail. Central London is about 41 miles from Long Sutton. Business park offices in the commuter belt are refitted as tenants change, and each fit-out adds services through compartment walls, and the gaps need sealing with the specified product.
Schools such as Long Sutton Church of England Primary School often have new data and services installed during holidays, and penetrations through fire-resisting walls should be checked afterwards. For a building such as Church of All Saints, new heating or data runs are the usual reason penetrations need sealing.
Long Sutton is about 5 miles north of Alton, in Hampshire. We cover commercial sites throughout Long Sutton. We work across 723 places in Hampshire. Our Reading page has more on work in that area, about 16 miles away.
We take on service penetrations across the RG29 postcode area, whatever the building. Among the streets we cover are The Street, Wingate Meadow and Wingate Lane. We also cover South Warnborough (1 mile west), Well (1 mile east), Bidden (2 miles west), Odiham (2 miles north) and Little Hoddington (2 miles west). Further afield, our area takes in Basingstoke (8 miles north-west), Farnborough (9 miles north-east), Fleet (6 miles north-east), Aldershot (8 miles east), Alton (5 miles south) and Petersfield (15 miles south).
Near you in Long Sutton
Locally, jobs take us to sites close to Lord Wandsworth College and Robert May's School and the streets around them. The nearest railway station is Bentley (Hampshire) station, about 4.2 miles south-east of the centre. Nearby you will also find Odiham Castle (3 miles north) and Alton Community Hospital (5.8 miles south). Green spaces nearby include Dogmersfield Lake and Holybourne Hill.
Why it’s worth doing now in Long Sutton
An improvised seal can look finished while offering no tested performance. The fix is to remove it and reinstall to the detail. Older rural buildings around Long Sutton move with the seasons, and rigid or tired sealant can’t keep up. The right product, sized to the joint, copes much better.
The specified product makes a difference, and so does the preparation. Access, phasing and site requirements come into it too.
Why choose Mastic Doctor in Long Sutton
- 12 months’ guarantee on every job
- One phone line for London, the South East and Scotland
- Fixed quotes based on photos, drawings or a visit
- Work to your specification and the manufacturer’s guidance
How the job changes 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.
Plastic pipes
Waste and drainage pipes through floors are a frequent case. The detail decides whether sealant alone is enough, and we’ll never swap a specified collar for sealant.
Towns and villages near Long Sutton
Other services in Long Sutton
When to bring in a specialist
Certain joints really need a specialist: for example fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. Getting these wrong normally costs more in the end than doing them right.
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.
Diagnose, treat, sign off
Where the site stays busy, the work is phased so only one area is out of use at a time. Each section is protected, cleaned back and sealed before we move to the next. Rural sites near Long Sutton may need directions, gate codes or a contact on site. Send that with the details and we will confirm the plan with the quote.
- We read the specification, drawings or penetration schedule you send.
- 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.
- Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
- Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.
Before we start on site
- Have the specification and drawings to hand
- Tell staff and tenants when we will be in
- Let us know about inductions and permits
Ask for a quote
We quote a fixed sum against the scope you give us, so you know the figure before anyone is on site. To start the process, call 01277 525 020 or email drawings and photos.
Advice
Common problems we fix in Long Sutton
On a busy project, programme pressure can mean fire stopping is rushed or left to whichever trade is closest. That is how unsuitable products and improvised details end up in compartment walls and later need putting right.
What tends to prompt an enquiry:
- Seals disturbed by maintenance and left open
- Fire stopping installed outside its tested range
- Unsealed openings around new pipes and cables
- Fire sealant pulled out of the opening
Large healthcare estates like Alton Community Hospital, 5.8 miles south of Long Sutton, change their services often, so penetration seals are worth checking after M&E work.
Questions to ask before you book
- Proof of insurance
- Is the sealant right for the movement and the substrate?
- Whether primer will be used where the manufacturer specifies it
- Will failed sealant be removed rather than covered?
Maintenance after handover
Problems stay small when the joints are checked regularly. Specifically:
- Agree the fire-stopping specification before services go in
- Look above ceilings when tiles are lifted for other jobs
- Make fire stopping part of every scope that crosses a fire-resisting wall
- Arrange inspection before areas are covered up
After every round of M&E works, check that the openings created have been sealed. A short check at the end of each job saves a long hunt later.
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.
Long Sutton: questions and answers
How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Long Sutton?
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. Whichever applies, we install the specified product to its tested detail; the specification is for the designer to set.
Is a smaller place like Long Sutton outside your area?
Not at all: smaller places are covered as well as towns. London and every South East county are within our area. Good photos up front let us bring everything on the first visit.
How many days will you need on site?
The duration is planned around your programme and the access we are given. We’ll give you an estimate of time on site when we quote.
How long before the joints can be used?
We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.
Are you fully insured?
Yes. Our insurance certificate can be sent alongside the quote.
Will you just go over the old sealant?
No. We cut the old material out and clean the joint back before sealing, since fresh sealant will not bond reliably to aged material.
Can the sealant be colour-matched?
Often, yes. Many products come in a range of standard colours, and matching to RAL references or surrounding finishes is often possible. We will confirm the colours available for the specified product.