Fire Tested Build-Ups
Fire Tested Build-Ups
Independently tested drylining systems with verified fire and acoustic performance. Every construction below is backed by a named test reference and a published test standard — so you can specify with confidence.
BS EN & BS 476 Tested
Constructions tested to BS EN 1364-1, BS 476 Part 22, and BS 476 Part 23.
30 to 120 Minutes
Fire resistance periods from 30 minutes up to 120 minutes across our range.
Acoustic Performance
Rw values up to 62 dB on our highest-performing twin frame systems.
UK Technical Support
Direct access to our technical team for specification and compliance advice.
System Types
Four tested construction families covering partitions, twin frame separating walls, shaftwalls, and MF ceilings.
Internal Partitions
Single-frame metal stud partitions for internal room separation. Tested from 30 to 120 minutes with acoustic options up to Rw 52 dB.
Twin Frame Separating Walls
Two independent stud frames for maximum acoustic and fire performance. The go-to solution for separating walls between dwellings, hotel rooms, and offices.
Shaftwall Systems
One-sided construction for service shafts, risers, and lift wells. High fire rating with a slim overall footprint and fast installation.
MF Ceiling Systems
Suspended metal frame ceilings tested for fire performance. Fire rating depends on the complete construction including board specification and framing arrangement.
Full Test Data
Every tested construction in our register, with the exact build-up, test standard, and performance result. Scroll horizontally on smaller screens.
| System Ref | Test Standard | Side 1 | Side 2 | Cavity Insulation | Stud | Acoustic | Width / Fire |
|---|---|---|---|---|---|---|---|
| TWIN FRAME 6S | BS EN 1364-1:2015 | 2no. 15mm Siniat dB Board | 2no. 15mm Siniat dB Board | 50mm APR 1200 roll | 2 × 60mm I stud (unbraced) | Rw 61dB (-8) | 220mm / 90 min |
| TWIN FRAME 3S | BS EN 1364-1:2015 | 2no. 15mm Siniat dB Board | 2no. 15mm Siniat dB Board | Rockwool RWA45 50mm | 2 × 50mm C stud (braced) | Rw 61dB (-8) | 200mm / 90 min |
| TWIN FRAME 5B | BS EN 1364-1:2015 | 2no. 15mm BG Soundbloc | 2no. 15mm BG Soundbloc | 50mm APR 1200 roll | 2 × 50mm C stud (braced) | Rw 61dB (-8) | 200mm / 120 min |
| RESILIENT BAR 1S | BS EN 1364-1:2015 | 2no. 15mm Siniat dB Board | 2no. 15mm Siniat dB Board | Rockwool RWA45 50mm | 70mm w/ Resilient Bar | Rw 62dB (-9) | 145mm / 120 min |
| INTERNAL PARTITION 2B | BS 476: Part 22: 1987 | 1no. 12.5mm BG Soundblock | 1no. 12.5mm BG Soundblock | N/A | 50mm | 37 dB | 75mm / 30 min |
| INTERNAL PARTITION 3B | BS EN 1364-1:2015 | 1no. 15mm BG Soundblock | 1no. 15mm BG Soundblock | N/A | 50mm | 40 dB | 80mm / 30 min |
| INTERNAL PARTITION 7S | BS EN 1364-1:2015 | 1no. 12.5mm Siniat dB Board | 1no. 12.5mm Siniat dB Board | N/A | 50mm | 39 dB | 75mm / 30 min |
| INTERNAL PARTITION 4B | BS EN 1364-1:2015 | 2no. 12.5mm BG Soundblock | 2no. 12.5mm BG Soundblock | 25mm APR 1200 roll | 50mm | 52 dB | 100mm / 90 min |
| INTERNAL PARTITION 5S | BS EN 1364-1:2015 | 2no. 12.5mm Siniat Fire Board | 2no. 12.5mm Siniat Fire Board | N/A | 50mm | 47 dB | 100mm / 120 min |
| MF CEILING 1B | BS 476: Part 23: 1987 | 2no. 12.5mm BG WallBoards | N/A | N/A | MF Grid | Construction dependent | N/A / 30 min |
| SHAFTWALL 2S | BS EN 1364-1:2015 | 3no. 15mm Siniat Fire Board | 1no. 19mm Siniat Fire Core Board | N/A | 60mm I stud | 48 dB | 105mm / 120 min |
| SHAFTWALL 4S | BS EN 1364-1:2015 | 1no. 19mm Siniat Fire Core Board | 3no. 15mm Siniat Fire Board | N/A | 60mm I stud | 48 dB | 105mm / 120 min |
Specification Guidance
What you need to know before specifying a fire tested build-up.
- Results relate only to the specific build-ups and test references listed. Any change to board type, thickness, insulation, framing size, or fixing arrangement may affect performance and must be checked separately.
- Fire performance is only valid when the complete tested construction is replicated on site — including the number of board layers, screw type and centres, and insulation density.
- Acoustic values are stated as Rw (laboratory) with the spectrum adaptation term where published. On-site performance (R'w) will typically be lower due to flanking transmission and workmanship.
- Stud sizes shown are the tested sizes. Larger studs may be permitted under the same test scope, but this must be confirmed against the original test report before specification.
- For C5 or high-corrosion environments, the framing must be specified with the appropriate coating. Standard galvanised steel is only suitable for dry interior conditions.
- Always confirm the specification against the original test report and, where required, consult a qualified fire engineer or building control body.
Frequently Asked Questions
Common questions from contractors, specifiers, and site managers.
What does "fire tested build-up" actually mean?
A fire tested build-up is a complete wall, ceiling, or shaftwall construction that has been physically tested in an accredited laboratory to a recognised standard — typically BS EN 1364-1 for partitions or BS 476 Part 22 for older UK tests.
The test result only applies to the exact combination of components that were tested: the board type and thickness, number of layers, stud type and size, insulation, and fixing method. Change any one of those and the fire rating may no longer be valid.
Can I use a larger stud than the one in the test?
In many cases, yes — larger studs are often permitted under the same test scope because the test is effectively "at least" the tested size. But this is not universal, and it depends on the wording of the specific test report.
Always confirm with our technical team before substituting a stud size. We can check the original test report and confirm whether the substitution is covered.
What's the difference between Rw and R'w?
Rw is the laboratory-measured sound reduction index of the wall build-up in isolation. R'w is the on-site, apparent sound reduction index, which includes flanking transmission through floors, ceilings, and adjacent walls.
In practice, R'w is typically 3 to 8 dB lower than Rw, depending on the quality of the surrounding construction and workmanship. Building Regulations requirements are normally expressed as DnT,w or R'w, not Rw.
Do you provide the original test reports?
Yes. For any system in our register, we can supply the test summary or the full report on request. Email our technical team with the system reference number from the table above and we'll send the relevant documentation.
What if none of these systems fit my project?
Our register covers our most commonly specified systems, but many projects need a bespoke solution. Contact our technical team with your project requirements — fire rating, acoustic target, wall height, and environment — and we'll advise on the most suitable tested build-up or arrange a project-specific assessment.
How do I calculate the materials I'll need?
Use our System Selector & Materials Calculator. It matches your project to a tested build-up and produces a full materials breakdown — studs, tracks, boards, screws, insulation, and sealant — based on your wall dimensions.
Need help specifying a fire tested system?
Our technical team can confirm fire ratings, check substitutions, and supply test documentation for your project.