The Mastic Doctor team standing beside their branded vans outside an office building
Aberdeen · Scotland

Fire-rated sealing and fire stopping in Northfield, Aberdeen

Fire-rated and intumescent sealing of service penetrations and linear gaps across Northfield, by CSCS-carded applicators. Fully insured and CHAS accredited.

  • Hidden openings found during inspections
  • Unsealed joints where partitions meet the slab
  • Builders’ foam or ordinary silicone in compartment walls
1
Send details
Photos, drawings or a schedule, or we visit.
2
Get a quote
A fixed price, with what’s included set out clearly.
3
We seal
Failed joints cut out, faces prepared, new sealant laid.
4
Guaranteed
12-month guarantee on our workmanship.
Covering the South East & Scotland
CHAS & Constructionline
Fully insured: £5m PL

Fire stopping for businesses in Northfield

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

How we handle fire stopping in Northfield

No fire sealant works on its own: its test evidence covers one product in one kind of wall or floor, with set services, gaps, depths and backing. Before we seal anything, we check the opening against the detail it is meant to follow. We work on service gaps in risers, cable penetrations and linear gaps at wall heads, and what we are called in for most is seals that don’t match their tested detail and unsealed joints where partitions meet the slab. A single leaking joint is often how a building in Northfield first comes to us: we check the joints around it and give you an honest view of what needs doing now and what can wait.

Tenement blocks and converted stone buildings in Scottish cities often hide old service routes through walls and floors. Wall type and service type decide the product, so both are checked before sealing, and design questions go to the designer or verifier.

A 12-month guarantee applies to all our work. If an installation problem shows up, give us a call on 01277 525 020 or send details through our quote form and we will arrange a return visit.

Where
Northfield (AB16, AB21)
Region
Aberdeen
Guarantee
12 months on every job
Price
Fixed quote, scope in writing
Telephone
01277 525 020
Page updated
3 November 2026
The Mastic Doctor team standing beside their branded vans outside an office building

Diagnose, treat, sign off

At the end of each section, the masking comes off, the area is cleaned and every joint is checked. Where the sealant needs time to cure before use, we tell you and sign the area. In a Scottish city, kerbside space and loading need planning, especially near the centre. Shared closes, stairs and the property factor may need to be part of the plan.

  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. Foam, ordinary sealant and debris come out so the seal starts clean.
  5. Backing and fire-rated sealant are installed to the detail and tooled.
  6. Anything outside the detail is reported to you rather than sealed.

Preparing the site

  • Send any specification or drawings in advance
  • Tell us your opening times and when work is allowed
  • For older buildings, check the asbestos register before work

Ask for a quote

We quote a fixed sum against the scope you give us, so the cost is agreed before work starts. To start the process, speak to us on 01277 525 020 or email us.

Get a price

Related advice

What we can’t put right

Not every problem is a sealant problem, and we are upfront when that’s the case. These need a different solution:

  • Gaps in walls that were never built as compartment walls
  • Writing the fire-stopping specification
  • Large openings beyond what any sealant detail covers

If in doubt, call 01277 525 020 or email the details over and we will say what we think.

Joints and surfaces we work on

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

Owners, agents and contractors

Facilities managers want contractors who arrive with the paperwork sorted. Tell us what site paperwork you need, such as RAMS, an insurance certificate or CSCS details, and we will confirm with the quote.

Housing associations and managing agents often need work done across blocks and communal areas. We phase the work so people keep access, with each stage agreed with your site contact.

How the job changes by surface

Risers and ceiling voids

Risers and ceiling voids hold most of a building’s service penetrations. Access to these areas is planned with you in advance.

Masonry and concrete

Core-drilled holes are neat; broken-out ones rarely are. The gap is measured at the widest point against the detail’s limits, and any that don’t are flagged.

Your questions answered

Is Twin Spires Business Park, near Northfield, within your area?

Yes. We cover Northfield and the area around it, including industrial estates, business parks and retail parks such as Twin Spires Business Park. A few photos and the unit address let us price the work.

Do you work in occupied care homes around Northfield?

Yes. We work around residents’ routines, a room or two at a time. Any site rules, from signing in to infection control, are agreed before we start.

Who decides which product is used?

If the job is specified, we follow the specification. If not, we choose for the movement, the surfaces and the conditions, in line with the manufacturer’s guidance.

Do you approve fire stopping for building control?

No. Sign-off belongs to the designer or building control, not the installer. We will confirm the product and detail installed, and you can tell us what other records you need at quote stage.

What site paperwork can you supply?

Tell us what site paperwork you need (RAMS, insurance certificate, CSCS details) and we’ll confirm with the quote.

What do BS EN 1366-3 and BS EN 13501-2 mean?

Penetration seals are tested to BS EN 1366-3 and linear joint seals to BS EN 1366-4. Results are classified under BS EN 13501-2, where E is integrity, I is insulation and the number is minutes, as in EI 60. That rating only holds when the product is installed to its tested detail.

Do the same rules apply to fire stopping in Scotland?

Building standards in Scotland are separate from England’s, and England uses Approved Document B. Wherever the site is, our work follows the specification and the tested detail.

Doing it in-house

A short, simple internal joint is often within reach of a maintenance team. The usual problems come from preparation: sealing over old material, sealing onto damp or dusty surfaces, or a product that can’t take the movement.

Some joints are best left to specialists: for instance fire-rated seals that must match a tested detail, trafficked floor joints and external movement joints. A poor seal in places like these tends to cost more to put right later.

Fire stopping in Northfield: the local picture

A 2-mile radius around Northfield takes in plenty of hotels. A hotel refit often runs new services through compartment walls between bedrooms and corridors, and each opening needs the specified seal. Five care or nursing homes sit less than 2 miles from Northfield. Care settings depend on compartmentation, so service penetrations made during maintenance or refurbishment need sealing with the specified product.

For an estates team at a campus like University of Aberdeen - Foresterhill Campus, which lies south-east of Northfield, summer M&E works are typically followed by a round of penetration sealing. Tenant changes at parks like Twin Spires Business Park, 0.7 miles north of Northfield, bring new data and services, and openings through fire-resisting walls need the specified seal. Hotels like Britannia Hotel (to the north of Northfield) are refurbished in phases, and each phase can open up compartment walls.

Northfield is about 2 miles north-west of Aberdeen, in Aberdeen. Anywhere in AB16, it works the same way: details in, fixed quote out, then sealing and a 12-month guarantee. Northfield is one of 40 places we cover in Aberdeen for service penetrations.

Postcode districts covered here: AB16 and AB21 for service penetrations. Buildings on Tay Road, Quarry Road and Deveron Road are within our area. Nearby places we also cover include Cummings Park (1 mile east), Mastrick (1 mile south), Bucksburn (1 mile north-west), Summerhill (1 mile south) and Cornhill (1 mile south-east). Nearby towns on our patch include Ferryhill (3 miles south-east), New Aberdeen (3 miles south-east), Dyce (3 miles north-west), Cults (3 miles south), Braeside (3 miles south) and Cove Bay (5 miles south-east).

What’s near Northfield

We work on buildings around Stewart Park and Bucksburn Academy and the streets around them. For rail, the closest station is Aberdeen station, about 2.9 miles south-east. Other landmarks nearby include Mar's Castle (2.7 miles east) and Gordon Highlanders Museum (2.1 miles south). Not far away are Rubislaw Quarry and Gallows Hill.

Map of Northfield © OpenStreetMap contributors

Keeping the joints sound

To get the most from the new sealant:

  • Don’t let anyone top up a fire seal with the wrong product
  • Make fire stopping part of every scope that crosses a fire-resisting wall
  • Check risers and ceiling voids after each round of works
  • Ask the designer to confirm details early on refits

Allow the manufacturer’s stated cure time before boxing in or decorating. Some fire-rated sealants accept paint and some don’t.

Looking at service areas on a regular cycle pays off. A cracked or disturbed seal found early is a small job; found late, it can be one of many.

Accreditations

Trusted. Accredited. Insured.