Which is better for a greenhouse roof?

The DMI panel. Its 10 ft length and 0.118 in thickness span a roof with fewer seams and resist wind better. The Palram works for small cold frames and side panels.

The DMI has a 10-year limited warranty and is almost four times thicker, so it should hold up longer. The Palram's thin 0.032 in sheet is more prone to flexing and cracking over time.

Is the DMI worth the extra money?

Yes if you are covering a full roof. At $129.99 versus $44.99, you get roughly 1.5 times the area, a much thicker sheet, and a warranty. For a single small repair, the Palram is enough.

The Palram states a co-extruded UV layer that blocks 99.9% of UV rays. The DMI listing does not state a UV rating, so ask the seller before using it over plants or people.

Can I cut both to size?

Yes. Both are corrugated polycarbonate and cut with a fine-tooth blade or shears. The DMI's extra thickness makes cleaner cuts easier but needs a sturdier support frame.

Which is better for a patio cover?

The DMI. A 10 ft by 2 ft panel covers more span with fewer joints, and the thicker sheet handles weather better. The Palram's 6 ft length forces more overlaps.

Palram Clear Corrugated Polycarbonate Roof Panel vs DMI Corrugated Polycarbonate Translucent Panels

Buy the Palram panel for small, budget jobs like a shed window, cold frame, or a single repair where 6 ft by 26 in is enough. Buy the DMI panel when you need a longer, thicker sheet for a full greenhouse roof or patio cover and want a 10-year limited warranty. The Palram is $44.99 at Tractor Supply Company as of November 6, 2026; the DMI is $129.99 at Amazon as of the same date.

Today the Palram Clear Corrugated Polycarbonate Roof Panel costs $85.00 less at its best price.

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