Heat seeks out cold.
To avoid hot from 1st floor rof.
2 add a lower ceiling with insulation material in between the existing roof and new ceiling.
As simple as this tip may seem family handyman notes that up to 30 percent of unwanted heat comes from your windows and utilizing shades curtains and the like can save you up to 7 percent on bills and lower indoor temperatures by up to 20 degrees.
We have a similar issue in our house.
While the term cool roof is sometimes used to describe any roofing surface that is cooler than a standard rooftop green certification.
The way i see it you have 2 options that will help.
A cool roof is a roof designed to maintain a lower surface temperature in bright sunshine than a traditional roof source.
In other words closing the blinds essentially prevents your home from becoming a miniature greenhouse which is.
1 put a rubber coating on the top of the roof rubber is an excellent insulator.
Add extra insulation to your roof and attic.
Department of energy the surface of a cool roof reflects more sunlight and releases more heat than a so called hot or dark roof.
Reduce use of lights and appliances avoid generating additional heat upstairs.
High temperature during night is not due to atmosphere but the heat radiation from the ceiling that stores all the heat.
Also adding an attic fan will help cool things down by circulating the air up there and decreasing the amount of hot air reaching your second floor.
Keep your blinds closed.
You can even air seal your attic to prevent heat from seeping in.
Painting the roof white will not help during the evening after the sun goes down.
If the upstairs floors have few windows and a lot of hallway space between fenestrations the whole floor s airflow can suffer.
Hot air doesn t just rise it actually seeks out colder environments.