The right order of layers and why each one matters. Built for roofs that are already installed, without rebuilding.
On an existing roof, the biggest comfort jump for the lowest spend usually comes from adding a ceiling where there isn't one and applying a reflective coating, then reinforcing with a radiant barrier and insulation. Each layer attacks a different link in the heat chain.
Reduces solar absorption at the source. Big effect for low cost See.
Slows the roof's radiation toward people.
Reflects the remaining radiant heat: 8 to 12% less cooling needed See.
Resistance to conduction. Choose the material based on fire, moisture and thickness See.
Lets hot air escape and avoids trapping moisture.
A diagnosis determines exactly which layers your roof needs, without overselling. Gallardía assesses and installs.
Every important claim links to its evidence. Tap to see the source, its context and its limits: DOE PNNL Insulators. Full bibliography in the evidence library.