The Mastic Doctor team standing beside their branded vans outside an office building
Hampshire · England

Andwell fire stopping

Fire stopping for Andwell, from a contractor working since 2005. Fully insured, with a 12-month guarantee.

  • Non-fire-rated filler around services
  • Unsealed openings around new pipes and cables
  • Seals that don’t match their tested detail
1
Send details
Tell us about the site, with photos if you have them.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
£5m PL insurance

Fire stopping for Andwell sites

Tell us what needs sealing and where, with photos or drawings if you have them, and we’ll price it.

For managing agents and facilities managers

Planned maintenance programmes are welcome: working through a building or an estate in stages that fit your budget. Sites in Andwell can sit alongside others in a wider programme across Hampshire.

For main contractors, we work as the sealant subcontractor on new-build and refurbishment projects. Programme, specification and site rules come first.

Fire stopping in Andwell

Fire-rated sealant suits many small service penetrations: copper and steel pipes, cables and some small ducts where the tested detail allows. Other openings need collars, wraps, batts, pillows or boards. We use sealant where it is the specified product, and we tell you when a detail calls for something else. If you have service penetrations left open after M&E works and unsealed joints where partitions meet the slab, we can put it right. Whether you call it commercial sealant work, mastic application or joint sealing, in Andwell it comes down to the same thing: the right product in a properly prepared joint.

For a smaller site near Andwell, we plan to do all the penetrations in one go, 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.

Our 12-month guarantee is about workmanship, not wear and tear. How long a sealant joint lasts depends on movement, exposure, cleaning and use, so we are clear about what is covered before work starts.

The Mastic Doctor team standing beside their branded vans outside an office building
Where
Andwell (RG25, RG27, RG24)
Region
Hampshire
Guarantee
12 months on our workmanship
Price
Fixed quote, scope in writing
Phone
01277 525 020
Last updated
3 November 2026

Fire stopping around Andwell: what changes locally

In England, Approved Document B covers fire stopping of 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. Either way, we install the specified product to its tested detail. Central London is about 43 miles from Andwell. Tenant changes on commuter-belt business parks mean regular fit-outs, and new services through compartment walls, and the gaps need sealing with the specified product.

Older community buildings such as St Swithun's church that have been rewired or given new heating can have service gaps through walls worth checking against the specification. On estates like Hatch Industrial Park, 0.8 miles south-west of Andwell, the wall between office and warehouse is often fire-resisting, and cables through it need the specified seal.

Andwell is about 3 miles south-west of Hook, in Hampshire. We cover Andwell, with the same fixed quotes and 12-month guarantee as everywhere else. 723 places across Hampshire fall within our area, including Andwell. For work in that direction, see our Reading page, about 13 miles away.

We take on service penetrations across the RG25, RG27 and RG24 postcode area. Among the streets we cover are Greywell Road and Canal Reach. Just outside Andwell, we also work in Mapledurwell (1 mile south), Water End (1 mile north-east), Old Basing (1 mile west), Lychpit (2 miles west) and Wildmoor (2 miles north). Nearby towns on our patch include Basingstoke (4 miles west), Farnborough (11 miles east), Fleet (8 miles east), Aldershot (11 miles east), Alton (8 miles south) and Yateley (9 miles north-east).

Around Andwell

For rail, the closest station is Hook station, roughly 2.4 miles east. A little further out are Festival Place (3.1 miles west) and Basingstoke and North Hampshire Hospital (4.2 miles west). For a walk, there’s Dogmersfield Lake and The Mill Field.

Map of Andwell © OpenStreetMap contributors

Diagnose, treat, sign off

Working in a building that stays open takes some planning. We sign and contain the area we’re in, with routes through the building left open and work section by section so the rest of the building stays in use. Jobs in and around smaller places like Andwell are usually planned as a single visit, so photographs and measurements up front really help. Then the right materials arrive with us.

  1. First we confirm the product and tested details named in the specification.
  2. Openings are measured and grouped by detail.
  3. Improvised fillers and failed sealant are removed.
  4. Mineral wool or other backing is fitted where required.
  5. Fire-rated or intumescent sealant goes in around the services and is tooled off.
  6. We walk the completed areas with you and confirm the records agreed at quote stage.

What we need from you

  • Point out parking and an unloading spot
  • Point out any areas we must not close
  • Tell staff and tenants when we will be in

Quotes

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. If you have questions first, give us a call on 01277 525 020 or send photos by email.

Get a price

Related advice

What we can’t put right

Part of a good diagnosis is knowing where sealant stops. We’ll tell you if the real problem is one of these:

  • Issuing fire ratings or certificates for seals
  • Deciding what a wall or floor needs, which belongs to the designer
  • Walls or floors that aren’t fire-resisting to begin with

If in doubt, call the office on 01277 525 020 or email us and we’ll say what we think before you book.

What we seal

  • Pipe penetrations
  • Joints between fire-resisting walls and floors
  • Linear gaps at wall heads
  • Service gaps in risers
  • Cable penetrations
  • Small duct penetrations where the tested detail allows

When to call us in Andwell

A common fault is a product that was never fire-rated in the first place: builders’ foam or ordinary silicone used to fill a hole. The opening looks sealed but has no fire test evidence behind it, so it has to come out.

These are often picked up first by site or facilities staff:

  • Damaged fire seals in risers and voids
  • Openings left by services added after handover
  • Expanding foam used as fire stopping
  • Fire-stopping items raised at inspection or handover

For a hospital such as Basingstoke and North Hampshire Hospital, 4.2 miles to the west of Andwell, penetration sealing is typically phased ward by ward, with infection-control rules agreed first.

Before you book anyone

  • How the joint faces will be prepared and primed
  • Health and safety accreditation such as CHAS
  • How they handle RAMS and site documents
  • How the existing material will be dealt with

Our contractor checklist

What affects the price in Andwell

Quotes vary with the job. Expect it to depend on:

  • How much there is to seal
  • Whether old sealant has to be cut out first
  • Site requirements such as inductions and permits
  • Distance, for remote addresses

Access can matter as much as the joints themselves: easy-to-reach joints are quicker than those that need equipment to get to. Mention the access as part of your enquiry.

Before you send an enquiry

For an accurate fixed quote, we need to understand the site. Useful things to include:

  • Drawings or a marked-up plan, if available
  • The postcode of the building
  • A wide shot and a close-up of the area
  • Anything awkward about access or site hours

Tell us about the building, the joints and when you need the work done, and a fixed quote will follow. The easiest way is to call 01277 525 020 or email the details over.

What the job involves on each surface

Plastic pipes

Plastic waste pipes through slabs come up often. The detail decides whether sealant alone is enough, and we won’t substitute it for a specified collar.

Linear joints

Head-of-wall joints often have to absorb slab deflection. We use the product and backing the detail names for that movement.

Questions we’re asked in Andwell

Can you work on a hospital site such as Basingstoke and North Hampshire Hospital?

Yes. Healthcare sites are among the places we work. Work is phased so departments keep running, under the site’s own rules.

What does the BS 476 change mean for fire-rated sealant in Andwell?

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.

Are you insured?

Yes. We are fully insured, and the certificate can go with your quote.

How do you choose the sealant?

A specification, where there is one, decides it. If there isn’t one, it comes down to the joint: its movement, its surfaces and what it has to cope with.

When is resealing likely to be due?

There isn’t a single answer, because life depends on how much the joint moves, how exposed it is and how it’s cleaned and used. Regular inspection is the best way to catch problems early.

Is any job too small?

Whatever the size, the process is the same: send details, get a fixed quote, we seal, guaranteed.

Do you guarantee your work?

Yes, for 12 months. If our installation fails in that time, we return and fix it.

Accreditations

Trusted. Accredited. Insured.