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

Hillstreet fire stopping

Fire-rated and intumescent sealing of service penetrations and linear gaps in Hillstreet. CHAS accredited, Constructionline member, with a 12-month guarantee on workmanship.

  • Fire sealant pulled out of the opening
  • Openings left by services added after handover
  • Hidden openings found during inspections
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
Backed by a 12-month workmanship guarantee.
Covering the South East & Scotland
Constructionline member
£5m public liability

Fire stopping near Hillstreet

Share the site address and what’s failing, and we’ll reply with a fixed quote or arrange a visit.

Why it’s worth doing now in Hillstreet

An improvised seal can look finished while offering no tested performance. Correcting it means cutting it out and starting again with the specified product, so it makes sense to get it right first time. Halls, stores and units around places like Hillstreet may not be checked every day, so a failed joint can leak for a while before anyone sees it. Renewing joints in good time avoids the problem.

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

  • Work carried out by CSCS-carded applicators
  • Public liability insurance in place
  • A Constructionline member, so easy to vet
  • Specification-led, product-correct work

Read how commercial sealant jobs are priced or how we’re accredited.

Fire stopping in Hillstreet

Our applicators are CSCS-carded, and we are CHAS accredited and a Constructionline member. We don’t hold a third-party fire-stopping installer certificate. We install the specified fire-rated sealant to its tested detail, and our workmanship carries a 12-month guarantee. If you are dealing with openings left by services added after handover and hidden openings found during inspections, we can help, whatever the surface. Whether you call it commercial sealant work, mastic application or joint sealing, the work in Hillstreet is the same: failed joints cut out, faces prepared and the right sealant laid to the right depth.

Barn and farm-building conversions near places like Hillstreet often combine new partitions with old walls. Where a pipe or cable passes through a fire-resisting wall, the seal must match the tested detail: product, substrate, gap and depth.

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

Place
Hillstreet (SO40)
Region
Hampshire
Cover
12 months on every job
Quote
Fixed quote, scope in writing
Telephone
01277 525 020
Updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Your questions answered

Can you work at a site such as South Hampshire Industrial Park, by Hillstreet?

Yes. Our area takes in Hillstreet and its surroundings, with estates and business parks such as South Hampshire Industrial Park included. A few photos and the unit address let us price the work.

What happens to BS 476 references for fire stopping in Hillstreet?

From 2 September 2029, Approved Document B drops its BS 476 references in favour of BS EN 13501-2 classification, with transitional arrangements. The designer or fire engineer sets the specification, and we install the product to the manufacturer’s tested detail.

Do you have public liability insurance?

Yes. We’re fully insured, including public liability cover.

Does the weather affect the work?

It can, when the joints are outside. Wet joints and cold, damp or frosty conditions stop the sealant bonding properly, so we watch the forecast and rearrange outside work if we have to. Indoors, the weather is rarely a problem.

Is the work guaranteed?

Yes, for 12 months. If a joint fails because of how we installed it, we come back and put it right.

Can you fit around our working hours?

Give us your site hours and any access windows in your enquiry, and we’ll plan around them. You can reach the office between 8am and 5pm, Monday to Friday.

When can the area be used after sealing?

We’ll confirm how long the chosen product needs to cure, and flag anything to keep off until it has cured.

Where services cross fire walls in Hillstreet

Hillstreet has seven care or nursing homes no more than 2 miles away. Where new services have gone through compartment walls in a care setting, the gaps need the specified product. For England, the fire stopping of penetrations is dealt with in Approved Document B. 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. We install whatever has been specified, to the product’s tested detail.

For a unit at a centre such as Nursling Retail Park, 1.8 miles to the east of Hillstreet, penetration seals are worth checking after each shop fit. Colleges such as Totton College (to the south of Hillstreet) add IT and services as courses change, and each new penetration through a fire-resisting wall needs sealing with the specified product.

Hillstreet is about 2 miles north of Totton, in Hampshire. We send applicators to Hillstreet for service penetrations. We work across 723 places in Hampshire, large and small. Sites around Southampton have their own page, about 6 miles away.

We cover the SO40 postcode districts. If your building is just outside Hillstreet, we cover Ower (1 mile west), Wigley (1 mile north-west), Totton (2 miles south), Winsor (2 miles south-west) and Netley Marsh (2 miles south). Bigger towns within reach include Winchester (12 miles north-east), Eastleigh (8 miles east), Fareham (15 miles south-east), Chandler's Ford (6 miles north-east), Hedge End (9 miles east) and Lymington (13 miles south).

What’s near Hillstreet

For rail, the closest station is Totton station, about 2.3 miles south-east of the centre. Well-known places in the area include Tatchbury Mount Hospital (1.1 miles south-west) and Eling Experience (2 miles south-east). Open spaces near Hillstreet include Testwood Lakes.

Map of Hillstreet © OpenStreetMap contributors

Signs you need fire stopping in Hillstreet

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:

  • Fire-rated sealant that has cracked or shrunk back
  • Unsealed joints where partitions meet the slab
  • Openings left by services added after handover
  • Fire seals cut back for extra cables and never reinstated

Hospital estates such as Tatchbury Mount Hospital (to the south-west of Hillstreet) are divided into fire compartments, and any service penetration through them should be sealed to the specified, tested detail.

What to look for in a quote

  • Will RAMS and insurance details be available?
  • Their public liability cover
  • Whether their applicators hold CSCS cards
  • Is the sealant right for the movement and the substrate?

Questions to ask before you appoint anyone

After the work

Once the work is signed off, these steps help:

  • Leave fire sealant to cure fully before covering it
  • Get seals inspected before ceilings and boxing close
  • File the specified details where the next contractor can find them
  • Brief every trade that openings they make must be sealed

Allow the manufacturer’s stated cure time before boxing in or decorating. Not every fire-rated product can be painted, so check the product data first.

On fit-outs, get the fire-stopping specification agreed before the services go in. The designer can then choose details that suit the services planned, and the work runs in step with the M&E.

Quoting for work in Hillstreet

Your fixed quote is built from the real scope. It takes account of:

  • Quantities, in metres or numbers
  • The size and state of each joint
  • Whether the work must be split into stages
  • How much existing material needs removing

Access can matter as much as the joints themselves: joints within easy reach take less time than ones that need access equipment. Mention the access as part of your enquiry.

What to include in your enquiry

To price the job accurately, we need to understand the site. Useful things to include:

  • Clear photos of the problem areas
  • Any dates the work must fit around
  • The site address and postcode
  • Approximate linear metres or a joint schedule

Every quote starts with the facts: what’s there, how much of it, how we reach it and what’s specified. Share whatever details you have and we will fill any gaps with a visit.

What we can’t put right

Our job is the joint, not everything around it. On its own, sealant can’t deal with:

  • Fire risk assessments, a job for a competent assessor
  • Writing the fire-stopping specification
  • Large openings beyond what any sealant detail covers

If in doubt, give us a call on 01277 525 020 or email a schedule or drawings and we will say what we think before you book.

Surfaces we seal

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

On site: what to expect

We begin with a short walk round with whoever looks after the building, agreeing which joints are in scope, where to start and what must stay open. After that, any old or failed material is removed, each joint is prepared and the new sealant goes in. For a building around Hillstreet, tell us how to find it and who will meet us. Add it to your enquiry and we will build it into the plan.

  1. First we go through the drawings, schedule or specification for the seals and raise any questions before we price.
  2. On site, each opening is checked against the tested detail it is meant to follow.
  3. Unsuitable fillers and loose debris are taken out of each opening.
  4. We fit the backing the detail asks for, to the stated depth.
  5. Fire-rated or intumescent sealant is gunned in to the specified depth, then tooled.
  6. Openings that need a collar, wrap, batt or other product are flagged to you rather than filled with sealant.

Before we start on site

  • For older buildings, check the asbestos register before work
  • Move anything stored against the joints
  • Let building users know which areas are affected

Ask for a quote

For a fixed quote, give us a call on 01277 525 020 or send photos by email. Our quote form is another easy route.

Get a price

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