aluminium foil foil radiant insulation

[bananapunk]

Hey guys,
I live in Singapore, where it's 30 degrees year round. I'm converting an attic space into a loft. I've just had the roof shingles replaced (clay) and an aluminium bubble foil radiant barrier installed underneath. My question is, would I benefit from installing rockwool insulation underneath?

Thanks in advance.

 

[bananapunk]

anyone?

 

[Notch7]

Superfoils (assuming thats what it is), need space above and below to work properly.

If you can have the required gap, then any additional insulation will improve thermal efficiency -any insulation stops movement of heat in or out.

You wont get much sympathy from us in the UK becsuse it always 30 degrees where you are

 

[bananapunk]

Thanks for the info, yup, it's a superfoil. My house will be naturally ventilated for the most part, I also got whirliebirds on the roof, ceiling fans and large windows. What I'm trying to avoid is the roof itself acting like an oven after it heats up during the day.