D & D Roof Insulation’s Insultrak™ addresses the problem presented by thicker faced fibre roof insulation materials being specified in over-purlin roof applications.


Due to extensive research and development to address the problem presented by thicker faced fibre roof insulation materials being specified in over-purlin roof applications, D & D Roof Insulation’s Insultrak™ was born.

There has been a marked increase in the use of thicker fibre blanket materials to attain the required thermal values for a building’s design since the SANS 10400-XA standard for energy usage in buildings has been implemented in the market. The use of these thicker fibre blanket materials impacted on the effective fixing of the roof sheet for both secret fix and standard roof sheeting systems in conjunction with the thicker insulation material.

During the R & D process, D & D Roof Insulation also had to find a material that would provide the required fire performance when used in these applications. After testing was done according to SANS 428 (fire performance classification of thermal insulated building envelope systems), a material was found that met these requirements.

The third requirement was that the material needed to provide effective insulation in order to negate thermal bridging that would occur with many other raw materials and that would enhance the total thermal value of the installed system. The fourth and final requirement was that the Insultrak™ spacer would improve the overall thermal value of the insulation material once installed, by providing the maximum return loft of the fibre blanket. D & D Roof Insulation subsequently found that the aesthetics of the faced fibre were not affected by the addition of the Insultrak™ spacer.

Insultrak™ is manufactured from a lightweight, high-density closed cell rigid foam in standard dimensions as required for the relevant thickness of insulation. These are the benefits of the spacer:

•    Ultra lightweight – adds no mass to the structure.
•    Excellent thermal value – thermal conductivity (K-Value) 0,024 W/m°C.
•    100% closed cell structure – impervious to moisture or water absorption.
•    High density – 32-36kg/m³.
•    High compressive strength – 160-310kPa, depending on thickness.
•    Fire-tested and approved for use in the required application.
•    Can be combined with other approved roof insulation materials to improve thermals.

Easy installation and customised solutions

Insultrak™ is easy to install in conjunction with the fixing of the roof sheet. During installation, the spacers are simply laid over the insulation on top of the purlin before fixing of the roof sheet, or clip system for secret fix roof sheeting. The standard application method for the relevant roof sheet (including longer fixing screws to accommodate the packer) is then done in order to fix down the roof.

The product is supplied in standard 3m lengths which are 75mm wide and available in the following thicknesses: 25mm, 40mm and 75mm. Alternative thicknesses may be produced upon request.

D & D Roof Insulation has been one of the leading innovators and suppliers of most commercially available roof insulation products in South Africa for the past 15 years. Following previous product successes such as the development of Starlite®, which was the first faced fibre roof insulation material in South Africa to achieve an A1 fire rating, the development of a solution such as Insultrak was therefore a natural progression.

D & D Roof Insulation
Tel: 012 800 3606
Fax: 012 800 3835
Email: info@roofinsulation.co.za
Website: www.roofinsulation.co.za