Does spray on radiant barrier really work?

Thereof, does radiant barrier really work?

Radiant barriers and reflective insulation systems work by reducing radiant heat gain. To be effective, the reflective surface must face an air space. Radiant barriers are more effective in hot climates than in cool climates, especially when cooling air ducts are located in the attic.

how long does radiant barrier last? ten years

Also know, is spray foam better than radiant barrier?

Open-celled spray-in foam insulation is by far superior to a traditional radiant barrier which is a foil-like thing that you can either tack to the rafters or lay on the floor of your attic. Radiant barrier laid on the attic floor is better than painted on radiant barrier.

Does spray foam stick to radiant barrier?

By combining radiant barrier foil with spray foam insulation you create two defenses for reducing heat flow into your home. So you can't just glue it to the shingles and add the foam afterward. The barrier reflects only radiant heat, which forms only in an air space.