Search by Certificate Number

Rockwool Limited

Wern Tarw
Pencoed
Bridgend
Mid Glamorgan
CF35 6NY
United Kingdom

Tel: +44 (0)1656 862621 • Fax: +44 (0)1656 862302
Email: info@rockwool.co.uk • Web: www.rockwool.co.uk


Certificate No 022a to BS 476: Part 21: Method 7 (see note 1)




Product

Specification

System

Thickness

(mm) (1)

Fire

Resistance

(min)

Integrity

Fire

Resistance

(min)

Insulation

Core

Material

LPCB
Ref. No.
Hardrock Dual Density Roofing Board System

100 - 135

60

60

Stone Wool

022a/01
Hardrock Dual Density Roofing Board System

140 - 205

90

90

Stone Wool

022a/01
Hardrock Dual Density Roofing Board System

210

120

120

Stone Wool

022a/01
Hardrock Dual Density SPA Roofing Board System

100 - 135

60

60

Stone Wool

022a/02
Hardrock Dual Density SPA Roofing Board System

140 - 205

90

90

Stone Wool

022a/02
Hardrock Dual Density SPA Roofing Board System

210

120

120

Stone Wool

022a/02
DuoRock Roofing Board System

100 - 210

60

60

Stone Wool

022a/03
Hardrock Multi-fix Dual Density Roofing Board System

100 - 135

60

60

Stone Wool

022a/04
Hardrock Multi-fix Dual Density Roofing Board System

140 - 205

90

120

Stone Wool

022a/04
Hardrock Multi-fix Dual Density Roofing Board System

210

120

120

Stone Wool

022a/04
Hardrock Multi-fix Dual Density Roofing Board System

150

90

90

Stone Wool

022a/04

 

Notes:
1.    Roof board system LPCB Ref No. 022a/01,  LPCB Ref No. 022a/03 & and LPCB Ref No. 022a/04 : Mechanically fastened Sarnafil single ply type S327 (1.2mm thickness), external weather proof membrane (or alternative membrane less than 3..5kg/m2  e.g.. PVC, Chlorinated PE, Butyl Rubber with welded seams); Comprising of two layers of Rockwool roofing board with staggered joints (100mm minimum stagger for fire resistance up to 90 minutes and 300mm stagger for 2 hours fire resistance), vapour control layer and 0.7mm thickness 35mm deep profile steel metal deck.
2.    Roof board system LPCB Ref No. 022a02; Sarnafil single ply external weather proof membrane type G410 (1.2mm thickness), fully adhered to Hardrock Dual Density SPA Roofing Board System with Sarnafil Adhesive (or Rockwool approved alternative, adhesive/membrane combination, with a membrane material less than 3.5kg/m2  e.g. PVC,  Chlorinated PE, Butyl Rubber with welded seams); comprising of two layers of Rockwool roofing board with staggered joints (100mm minimum stagger for fire resistance up to 90 minutes and 300mm stagger for 2 hours fire resistance), vapour control layer and 0.7mm thickness 35mm deep profile steel metal deck.
3.    The test construction was tested unloaded.  However, deflection of the roof did not exceed the allowable limits set out in BS 476: Part 20: 1987 for loadbearing horizontal elements.  Decking side laps were stitched at 450mm centres.
4.    Roof board System LPCB Ref 022a/01, 022a/02 & 022a/03 Hardrock Dual Density Roofing Board System, Hardrock Dual Density SPA Roofing Board System and DuoRock Roofing Board System are also available and approved in cut-to-fall tapered options, the relevant minimum & maximum and maximum system thickness and staggered joints shall apply as detailed above.
5.    Hardrock Multi-fix Dual Density roof board system 022a/04 at a thickness of 150mm is unfaced and for the purpose of extending the thickness within the Multi-Fix system.

 


 

To read the Red Book section introduction click here.

 

< back to results page

< back to search page