Mastic never totally hardens so it doesn't dry out loosen with age. More heat is transferred into homes from outside walls painted with dark colors-than those painted with light colors. Ceilings painted with light colors reflect light downward, which will make room lighting more efficient . Fans blowing, but not directly on you will not produce the same effect. Keep blinds and drapes closed to keep your house cooler.
Drapes block out sunlight and heat better than blinds.
Lower the thermostat on your water heater to 120 degrees. An insulating blanket will pay for itself in one year or less. Turn down or shut off your water heater when you will be away for extended periods. TOP Lighting Turn off unneeded lights, even when leaving a room for a short time. Lights generate heat that increases room temperature.