Here is the method for my experiment:

Method: Part A

1. Lay five different colour of steel out in sun.
2. Leave for 1 hour.
3. Record temperature of steel.

Method: Part B

1. Collect steel samples and cardboard.
2. Set-up steel sample at different roof pitches
3. Leave in sun for 4-6 hours
4. Record Observations and temperature
5. Repeat steps 3 and 4, 3 times, each time facing a new direction (i.e North, South, East and West)