HELP SCIENCE question>>>>>>>>>>>10 points?

Question

what type of surface is better for a flat roof, a matt surface or a smooth shiny surface??

plzz help i am stuck

please explain your answer so i can follow through it and understand it.

Answer 1

id say....matt...since it doesnt reflect sunlight and get less warm then the siny surface....hope it helps...

Answer 2

A shiny reflecting surface is best. This will reduce the heating affect of the sun and reduce the amount of movement of the roof due to thermal expansion, thus causing less movement and damage to any joints.

Answer 3

matt because a shiny surface obviously will allow more water to sit on the surface and a 'textured' surface will allow it to run out in 'channels'. that is what my dad says anyway!!!!!!