Problem Statement

• What is the optimal amount of insulation to apply on the walls, floors & ceilings ?

i.e. the minimum amount of insulation to achieve the maximum amount of energy savings. The concern is that if (for example) 200mm of insulation is used, will increasing this to 300mm only save an additional 5% ? And hence, is it worth it ?

Specification and design questions

• What type of insulation should be used ?
• Should it be applied internally or externally ?

Is it better if the insulation is applied externally to the house such that in summer, the walls are protected from the sun and do not heat up, and in winter, the walls become “storage radiators” of heat.

• How should it be constructed ?
• Once insulation is in place, should additional ventilation be designed in assuming that part of the exercise is to eliminate all drafts ?