Which is better for an attic?

The perforated roll. It is the one meant for attic rafters and attic floors because the pin holes let moisture vapor pass instead of trapping it under the roof.

Can I use the solid roll in an attic?

Yes, but only if you tape the seams it becomes a vapor barrier, which can trap moisture in a humid attic. The perforated roll is the safer choice there.

Which one works as a vapor barrier?

The solid roll. Tape the seams and it blocks moisture in walls, roofs, floors and crawl spaces. The perforated roll runs about 8.5 perms and is not a barrier.

Is the solid roll worth the extra $29?

Only if you need a vapor barrier. For attic work the perforated roll does the same radiant job for $69.90 at Target versus $98.88 at Amazon.

Do they block the same amount of heat?

Yes. Both list 97% radiant heat block in their specs and 96% in their descriptions, with the same 99.9% aluminum coating and E84 fire test.

How much area does each roll cover?

Both are 4 ft by 125 ft rolls covering 500 sq ft, so one roll of either covers the same area.

EcoFoil Perforated Radiant Barrier Foil vs EcoFoil Solid Radiant Barrier Foil

Buy the perforated roll for an attic install, especially in a humid climate, because it lets moisture pass through and costs less. Buy the solid roll when you need a vapor barrier in walls, floors or crawl spaces and will tape the seams. As of November 6, 2026, the perforated roll is $69.90 at Target and the solid roll is $98.88 at Amazon, so the perforated version saves about $29.

Today the EcoFoil Perforated Radiant Barrier Foil costs $28.98 less at its best price.

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