Attic Insulation

Attic Insulation: The Real Deal

Look, everyone overcomplicates this. You have a hot attic. You want a cool bedroom. That’s it. Spent weeks researching R-values and materials because contractors here will just tell you to use “foam” (useless).

Basically you have two options. well, two good ones.

option 1: the fancy way (Roof Insulation)

This is where you stick insulation right under the roof sheets. It creates a “warm roof” - terrible name, it actually keeps the attic cool.

Why bother:

• If you have water tanks or pipes up there, they won’t boil
• Your attic becomes actual usable storage
• condensation isn’t as big of a deal

The catch:

• Expensive. like, 2x the cost.
• you need way more material
• if you don’t vent it properly you get mold… saw this happen to a neighbor in Cavite. gross.

option 2: the cheap way (Floor Insulation)

Just roll some insulation on the attic floor / ceiling of your room.

Why I like this:

• Way cheaper. less surface area.
• Works great if you just want a cold bedroom
• easy to DIY if you’re brave enough to go into a hot attic

The downside:

• Your attic stays oven-hot (like 50C+)
• Don’t store candles up there. or plastic.
• You can’t really use it as a room

finding the right stuff

Forget the brand names for a second. here’s what you’ll actually find in hardware stores:

Rockwool (Mineral Wool)

• best bang for buck usually
• won’t catch fire (melts at >1000C or something crazy)
• easy to cut
• ITCHY AS HELL. wear gloves. seriously.

XPS (That pink/blue foam board)

• Stiff, you can walk on it
• handles water better
• expensive though
• termites might eat it? heard mixed stories on this

vapor barriers?

Everyone asks about this. “Do I need a plastic sheet?” In the Philippines… usually no. Unless you have 24/7 AC making your room freezing while it’s 35C outside, condensation isn’t the main enemy here. It’s the heat. focus on the heat.

my advice

If you’re just storing christmas decors… go with floor insulation. Use Rockwool. Save the money for better windows or something.

But if you want to turn that attic into a man cave? yeah you need the roof insulation. Just prepare your wallet.

btw wear a mask if you DIY this. attic dust is no joke.