We live in a tropical country and having to suffer the heat nine out of 12 months every year, I do not understand why the standard roofing material for houses are galvanized sheets. Not only do they trap the heat inside the house, they jack up electricity consumption as well because they make aircons and refrigerators work many times harder than they normally should.
Okay, so galvanized sheets are cheaper than roof tiles and more durable than cogon grass. But if you had a choice, if there was a way to minimize the trapped heat inside the house by using a more heat friendly roofing material, would you still go for galvanized sheets?
Roof tiles, especially those made from clay, aren’t as expensive today as they once were. There are even concrete roof tiles in the market today. If your architect only knows galvanized sheets, fire him and get another. :razz:
Shingles (asphalt, slate or wood) are not very popular in this country but might be worth considering. Check out an article over at Pinoyhandyman. Note as well that there is doubt as to whether shingles can be painted.
Now, if you still elect to have galvanized sheets installed on your roofs, start gathering information about roofing insulation. You will need them unless you like steam baths 24/7.