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

Picket Twenty fire stopping

Commercial sealant work in Picket Twenty for contractors, FMs and building owners: fire-rated and intumescent sealing of service penetrations and linear gaps, quoted at a fixed price.

  • Openings left by services added after handover
  • Fire-stopping items raised at inspection or handover
  • Seals disturbed by maintenance and left open
1
Send details
Drawings, photos, a joint schedule or a site visit.
2
Get a quote
One fixed quote covering the agreed scope.
3
We seal
Prepared joints, the specified product, a tidy finish.
4
Guaranteed
Our workmanship is guaranteed for 12 months.
South East, London & Scotland
Constructionline member
£5m public liability

Fire stopping for businesses in Picket Twenty

Photos, a specification or a quick description of the joints is enough to start a fixed quote.

Common problems we fix in Picket Twenty

Mixing products or improvising a detail breaks the link with the test evidence. Gaps beyond the tested size, shallow sealant, no backing where it was needed, or products from different systems mixed together are the usual culprits.

Clients normally get in touch after noticing something like this:

  • Fire-rated sealant that has cracked or shrunk back
  • Hidden openings found during inspections
  • Builders’ foam or ordinary silicone in compartment walls
  • Fire stopping installed outside its tested range

Hotels like Best Western Andover Hotel, 0.6 miles west of Picket Twenty, are refurbished in phases, and each phase can open up compartment walls.

What your quote should include

  • The named product and why it was chosen
  • How the joint faces will be prepared and primed
  • Will RAMS and insurance details be available?
  • How joint depth will be controlled

Our contractor checklist

Fire stopping in Picket Twenty

Penetration seals are fire tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4, with results classified under BS EN 13501-2. A rating such as EI 60 only holds when the product is installed as it was tested. So our job is to reproduce that arrangement faithfully. If you have seals that don’t match their tested detail and snag lists that include open service penetrations, we can help, on pipe penetrations, service gaps in risers and cable penetrations alike. Facilities teams, main contractors and managing agents in Picket Twenty tend to want the same three things: a clear scope, tidy work and joints that don’t fail again.

Around smaller places like Picket Twenty, penetration seals come up in schools, halls, pubs with rooms, care homes and farm buildings used as offices. If sealant is what the specification names, we install it around the services exactly as the maker’s detail sets out.

Our workmanship is guaranteed for 12 months. If a joint we sealed fails because of how it was installed, we come back and put it right.

Place
Picket Twenty (SP10, SP11)
Wider area
Hampshire
Guarantee
A 12-month guarantee
Quotes
Quoted before any work starts
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Common questions from Picket Twenty clients

Would you work within a site like Andover Hospital (Grounds)?

Yes, hospitals are one of the sectors we cover. We follow the site’s permits, sign-in and infection-control procedures in every area.

How does the removal of BS 476 from Approved Document B affect fire-rated sealing in Picket Twenty?

Approved Document B loses its BS 476 references from 2 September 2029, and BS EN 13501-2 becomes 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.

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.

Are you CHAS accredited?

Yes. We’re CHAS accredited and a Constructionline member, which helps with supplier vetting.

Can you quote from photographs?

That depends on the size and complexity of the job. Simple work can often be priced from photographs, while larger or less clear jobs get a site visit first.

When can you be on site?

Mention the site’s hours and access windows in your enquiry, and we will schedule the work to suit. You can reach the office between 8am and 5pm, Monday to Friday.

What if there’s asbestos in the old mastic?

Managing asbestos is the dutyholder’s responsibility, so we’ll ask for the register before work on an older building. Work pauses if suspect material is found, until it has been tested.

Cost factors for service penetrations

These are the things that shape the price:

  • Site requirements such as inductions and permits
  • Specialist products, such as fire-rated or hygienic sealants
  • Removal of failed or old sealant
  • Phasing around occupants

Whether it’s a single area or a whole estate, the same things set the price: scope, access, product and programme. Call for a quote, and you will have a fixed figure to work with.

What we need to price the job

There’s no need for a formal survey. These details are enough to start:

  • Whether the building will be occupied during the work
  • A wide shot and a close-up of the area
  • Anything awkward about access or site hours
  • Any dates the work must fit around

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 will fill any gaps with a visit.

Should maintenance staff do it?

Using site staff can make sense for a small touch-up, but larger jobs are different: a specialist works through quantities efficiently, leaves a consistent finish and backs it with a 12-month guarantee.

Site maintenance staff can often handle a short internal joint. Where it goes wrong is preparation: new sealant over old, damp or dusty faces, or the wrong product for the movement.

Diagnose, treat, sign off

Site rules come first: 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, and each area is checked before we leave it. Jobs in and around smaller places like Picket Twenty are usually planned as a single visit, so we ask for photographs and rough sizes first. Then the right materials arrive with us.

  1. We start with your penetration schedule, drawings or specification.
  2. Access, permits and the order of areas are agreed with the site team.
  3. We compare every service penetration with its tested detail before sealing.
  4. Unsuitable material is removed and the opening cleaned.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. We tell you about openings that need a different product.

Getting the site ready

  • Confirm the product named in the specification
  • Tell us which areas need to stay in use
  • Clear stock, furniture or equipment away from the joints

Quotes

The quickest route to a quote is a few photographs and the site postcode. Upload them with the quote form, or call the office on 01277 525 020 or email a schedule or drawings to discuss it first.

Get a price

Related advice

Why act early in Picket Twenty

Inspections and handover checks often pick up fire stopping. Finding unsealed or improvised openings late can hold up a programme. Converted and older buildings near places like Picket Twenty tend to move, and aged sealant cracks. The right product, sized to the joint, copes much better.

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.

Why appoint us

  • Commercial sealant work since 2005
  • CHAS accredited
  • Fixed quotes based on photographs, drawings or a visit
  • Workmanship guaranteed for 12 months

See what affects the cost and how we’re accredited.

Compartment walls and floors in Picket Twenty

The area within 2 miles of Picket Twenty holds a number of hotels. Hotels are divided into compartments, and refurbishments that add pipes and cables through bedroom and corridor walls leave gaps to close. Central London is about 62 miles from Picket Twenty. Offices around the capital are refitted often, and the cabling that follows can breach fire-resisting walls.

Older community buildings such as United Reformed Church that have been rewired or given new heating can have service gaps through walls worth checking against the specification. Office fit-outs on sites such as Walworth Business Park (0.6 miles north of Picket Twenty) add cabling and pipework through fire-resisting walls, and fire-rated sealant goes in where the specification calls for it.

Picket Twenty is about 1 mile east of Andover, in Hampshire. Any commercial site in Picket Twenty is covered, for single jobs and planned programmes alike. Picket Twenty is one of 723 places we cover in Hampshire for service penetrations. Our Southampton page has more on work in that area (20 miles or so).

Work on service penetrations is covered throughout SP10 and SP11, whatever the building. We cover commercial and managed buildings on Levy Road, London Road and Stalls Road and the roads nearby. Main routes into Picket Twenty include the A3093, useful when we plan access and materials. We also cover Andover Down (1 mile north-east), Finkley Down (1 mile north), Picket Piece (1 mile north-east), Andover (1 mile west) and East Anton (1 mile north-west) for service penetrations. Further afield, our area takes in Winchester (12 miles south-east), Romsey (15 miles south), Hyde (11 miles south-east), Tidworth (9 miles west), Weeke (11 miles south-east) and Kempshott (14 miles east).

Around Picket Twenty

We work on buildings around Winton Community Academy and Winton Community Academy. For rail, the closest station is Andover station, roughly 1.8 miles west of the centre. A little further out are Finkley Down Farm Museum (1 mile north) and Andover War Memorial Hospital (1.9 miles west). For a walk, there’s Anton Lakes and Mill Lake.

Map of Picket Twenty © OpenStreetMap contributors

Owners, agents and contractors

When you manage a building on behalf of an owner, you need clear quotes and clear reporting. We quote a fixed sum, confirm the scope and walk the finished work with you or your representative, plus a 12-month guarantee.

Blocks and communal areas make up much of the work for housing associations and agents. Work can be phased so residents and staff keep access throughout, with each stage agreed with your site contact.

Accreditations

Trusted. Accredited. Insured.