The paper describes the effect of variety of roof insulation in reducing heat flow into the industrial building. As a result of industrial roof insulation application, a reduction in ceiling temperature is observed. It is found that by using 2.5cm thickness of particularly fibreglass or equivalent heat insulation reduce ceiling temperature upto 13oC of an industrial shade. Similarly, as per heat flow computation, more than 50% heat flow reduction is achieved in such industrial roof shaded building.
Introduction

In air conditioned building, as the capital cost and energy savings assumes greater importance, thermal insulation plays positive role in reducing the cooling loads. Similarly, in case of unconditioned building, though direct saving is not an issue but the improvements obtained in indoor thermal comfort conditions and their indirect influence on increasing working efficiency and productivity are sufficient incentives for the use of thermal insulation for thin roofs of industrial buildings.
The large scale manufacture of a variety of thermal insulating materials, within the country, is a recent development and this can be expected to create a favourable condition for economic application of thermal insulation to industrial buildings. This aspect brings out the advantage of thermal insulation in reducing the ceiling temperatures and heat flow in clear quantitative terms.
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