Modular insulated building structure and method

A building structure, comprising:

• an upstanding substantially vertical wall portion constructed from a plurality of interlocking wall sections formed from a thermally insulating rigid foam material, said wall portion forming a closed substantially circular shape, said wall sections being provided with architectural components such as doors, windows or the like prior to erection of said wall portion;
• a roof portion constructed from a plurality of interlocking thermally insulating rigid foam roof sections, said roof sections being substantially wedge shaped and having a pair of diverging side portions extending between an apex and a base portion, said base portion forming a substantially vertical end portion adapted for placement adjacent the upper end of said wall portion so as to form a joint therebetween;
• band means adapted to overlap the joint between said roof sections and said wall portion and extending about the periphery of said building structure adjacent the outer surface thereof and adapted to be tensioned thereabout to maintain the circular shape of said structure;
• and
• a concrete-like coating applied to the outer surface of said roof and wall portions for protecting the rigid foam insulating material of said roof and wall sections.

A method of constructing a building structure, comprising the steps of:

• providing a plurality of interlocking wall sections formed from a thermally insulating rigid foam material;
• interlocking said wall sections to form a closed shape;
• providing a plurality of interlocking roof sections formed from a thermally insulating rigid foam material, each said roof section having a substantially vertical end portion;
• placing said roof sections atop said interlocked wall sections so that the substantially vertical end portion of said roof sections is adjacent the upper end of said wall sections so as to form a joint between said roof sections and said wall sections;
• providing a retainer band overlapping the joint between said roof sections and said wall sections about the outer periphery of said building structure;
• introducing tension to said retainer band to maintain said closed shape of said structure;
• and
• coating the outer surfaces of said wall and roof sections with a weather resistant cementitious material.