i am living in a ground storey house and there's no construction on top of my house. therefore it's very hot in summer and winter is normal.please help me to elaborate any procedure or material for cooling my top (ceiling) . i would be very grateful. thanks and regards.
Don't know where you are or what type of roof we're talking about, but I would say an elastomeric roof coating would do the trick.
If you have an attack put fiberglass insulation above the ceiling
If you have a one story house, you must have an attic. Fiberglass insulation is the best way to help with the heat transfer from the roof to the inside of the house thru the attic. R-30 is the best but R-19 fiberglass batts will work too, depending on your budget and the space above the ceiling in the attic.R-30 insulation is 9 or 10 inches thick and is 15' OR 23 ' wide, R- 19 is 6 thick. Lay the batts of insulation above the wood framing in the attic , leave no spaces between the batts, and do not compress the batts, they need to be full thickness to work the best they can. If no attic space is there, then you need Styrofoam insulation under the roofing, on top of the roof deck, which is a whole different matter.