technical study and comparative tests on thin insulators. initial thermal performance of Thin Reflective Products (PMR)
Edition CSEC, Scientific Centre and the Technical Construction.
Context and scope of the study
CSEC and other organizations, including the government, are now faced with increasing demands for information on products commonly referred to as "thin reflective products" (RMPs). The public authorities, partners in this study, wish to clarify the characteristics of this type of product, particularly with a view to applying the thermal regulations in force in each region of the country.
One of CSEC mission is to conduct scientific and technological research to inform at best the construction sector of the evolution of materials and techniques of implementation, CSEC has had to propose a study on performance thermal RMCs.
The study to determine the thermal performance of several of these products, mainly based on a measurement campaign conducted at the experimental station of the CTSA.
A thin reflective product comprises, in its central part, with a thin layer of material (plastic foam, polyethylene film trapping air bubbles or a fibrous material) covered on one or both sides of reflective sheets (sheets aluminum or aluminum-coated films). Some products are multi-layer type, the layers being separated by intermediate reflective foils. The total thickness is generally between 5 and 30 mm.
Only the thermal performance of winter products were studied.
The solar performance (ea solar factor) structures equipped with PMR were not considered, nor are the other features, such as resistance to diffusion of water vapor, sound insulation or fire reaction.
Thermal performance was measured on the products in their original state, ie as they were provided by the manufacturers, and ideally placed.
The influence of the conditions of use and implementation of the thermal performance of the products and the effect of the possible degradation of thermal properties over time have not been studied.
The general methodology of the study and a test procedure proposal were presented to partners and were discussed prior to the start of the measurement campaign. Each partner (public authorities, scientific experts and manufacturers) had the opportunity to make his remarks. These have been integrated into the work program when they have been the subject of unanimous agreement among scientists study partners (both scientific experts and CSEC).
The methodology was to determine the thermal performance of PMR, firstly, based on laboratory measurements (under conditions to stationary limits) and, secondly, on the basis of measurements in cells of test subject to real external conditions (regime by non-stationary gasoline). The results of these two types of measurements were compared among themselves as well as the results of calculations performed in accordance with standards.
Annex 2 (p. 35) provides an overview of the schedule of the study (holding key meetings, periods of testing ...).