Roof Design in the Philippines

Option 1: Asphalt shingles
The most affordable choice.

Option 2: Metal roofing
Philippine roofing contractors mostly use corrugated galvanized steel or zinc-aluminum roof panels. Metal shingles are available, which create a tiled look. They can be prepainted. The maintenance of a steel roof is frequent if your house is very near the sea.
It's lightweight, installs quickly, has excellent durability, fire-resistant and does a good job of reflecting the summer sun; specially when white painted (which saves on insulation also!).
But metal roofs can be noisy when pounded by rain and they can dent when you walk over it.

Option 3: Tile Roofing
Roofing tiles are made of clay or ceramic. Perhaps the most durable of all residential roofing.
Expect for stone roof tiles the requirement of a stronger structure of your house in the Philippines, to cary the very heavy load... hence higher cost...
Tile roofs are an attractive but quite expensive option.

Option 4: Green Roof Garden
How about a green roof garden in the Philippines?

Also think about exhaust fans under your roof to expel the hot air above your ceiling; they have a thermostat which starts when the temerature inside your roof becomes too high.

The fans replace the hot air; this process assures owners not only of a cooler house in the Philippines and saves on the electricity-bill but also avoids cracking of ceiling board joints and joints of cornice and wall. See here:

...and more detailed here...

Any insulation is mostly placed between the purlins and the roof panels because this way the insulation rejects the heat by as much as 80% before it enters the ceiling.

If you would place the insulation on top of the ceiling board, then you allow the heat to come in and let the insulation work later...

The ceiling board also acts as secondary insulation.
  
  

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