I built this so that one side of the roof will open up by way of hinges at the peak of the roof . This enables me to chjange out the hay for bedding and also change out buned out bulbs /or change wattage depending on the temperature ouside thru out the winter months.
I installed 3- 100 watt light bulbs that are installed inside a metal surround for safety and at the same time the metal collects heat from the light bulbs and transfirs heat to the whole inside of the dog house..
The floor ,walls and roof are isulated /sandwiched between OSB board and T-1-11 .
Heres the build pictures ..