Is 4 mm polycarbonate thick enough for a greenhouse roof?

Yes for light glazing on a framed roof in mild climates. It is thin, so space supports closely and fasten it well to stop flexing in wind. For snow load or cold winters, twin-wall or thicker panels hold up better.

How much area do 16 panels cover?

Each sheet is 48 x 24 inches, about 8 square feet, so 16 sheets cover roughly 128 square feet before overlaps and cuts. Plan for waste at edges and framing.

Does it block UV light from plants?

It is made with UV protection, which shields the plastic from sun damage and filters some UV. Visible light still passes through, so plants get the daylight they need.

Can I cut these panels to size?

Yes. Polycarbonate cuts with a fine-tooth saw or utility knife and drills with standard bits. Cut slowly and support the sheet to avoid cracking.

What is included in the set?

Sixteen 48 x 24 inch polycarbonate panels. Framing, screws, washers and sealing tape are not included, so buy those separately for your build.

Will the panels turn yellow over time?

Polycarbonate can yellow and haze after years of strong sun, though the UV layer slows it. Expect several years of clear service, less in very sunny, hot spots.

DINAJIE

DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels

Best price now

$169.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

DINAJIE

DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels

Best price now

$169.99at WalmartChecked Nov 11

Prices are checked against each store and labelled with when.

Visit Walmart

Ask our agent about this product

It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $169.99 at Walmart on Nov 11.

Our take on the DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels

These are 16 clear polycarbonate sheets, each 48 x 24 inches and about 4 mm thick, sold as a set for greenhouse glazing and other outdoor cover projects. Polycarbonate is far tougher than glass or acrylic: it resists impact, shrugs off weather and blocks most UV light while still passing daylight to plants. The sheets are light, so one person can handle them, and they cut and drill with ordinary tools. Against twin-wall panels they are simpler and cheaper to work with but offer less insulation, so they suit mild climates and DIY covers more than cold-weather growing.

Best forDIY greenhouse glazing and repairsShed, patio and garden enclosure coversGrowers in mild climatesBudget-conscious builders who cut their own panels

Pros

Impact resistant, unlike glass
Blocks most UV while letting light through
Waterproof and weatherproof for outdoor use
Lightweight and easy to cut, drill and mount
16 sheets cover a large glazing area

Cons

Single-wall 4 mm sheets insulate poorly compared with twin-wall
Can yellow and lose clarity over years in strong sun
Thin panels may flex or rattle without firm framing
No framing, fasteners or trim included

DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels prices at every store

WalmartNew
In stockSold by Dianjie StoreReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$169.99Free shippingChecked Nov 11
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About the DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels

This set includes 16 polycarbonate panels, each measuring 48 x 24 inches. The panels are made of polycarbonate and are 4 mm (0.16 inch) thick. They provide UV protection and let light through to plants.

The panels are waterproof, impact resistant and weatherproof, so they suit a range of outdoor climates. They are lightweight and easy to cut, drill and mount.

They can be used for greenhouses, sheds, patio covers, garden enclosures and other DIY outdoor glazing projects.

Material: Polycarbonate
Panel size: 48 x 24 in (4 ft x 2 ft)
Thickness: 4 mm (0.16 in)
Quantity: 16 panels
Features: UV protection, light transmission, waterproof, impact resistant, weatherproof
Uses: Greenhouses, sheds, patio covers, garden enclosures, DIY outdoor glazing

Specifications

color: OtherSource
actual_color: 4mm 48 x 24 x 0.16" 16PCSSource

Questions and answers

Is 4 mm polycarbonate thick enough for a greenhouse roof?: Yes for light glazing on a framed roof in mild climates. It is thin, so space supports closely and fasten it well to stop flexing in wind. For snow load or cold winters, twin-wall or thicker panels hold up better.
How much area do 16 panels cover?: Each sheet is 48 x 24 inches, about 8 square feet, so 16 sheets cover roughly 128 square feet before overlaps and cuts. Plan for waste at edges and framing.
Does it block UV light from plants?: It is made with UV protection, which shields the plastic from sun damage and filters some UV. Visible light still passes through, so plants get the daylight they need.
Can I cut these panels to size?: Yes. Polycarbonate cuts with a fine-tooth saw or utility knife and drills with standard bits. Cut slowly and support the sheet to avoid cracking.
What is included in the set?: Sixteen 48 x 24 inch polycarbonate panels. Framing, screws, washers and sealing tape are not included, so buy those separately for your build.
Will the panels turn yellow over time?: Polycarbonate can yellow and haze after years of strong sun, though the UV layer slows it. Expect several years of clear service, less in very sunny, hot spots.
Where is the DIANJIE 48 x 24 in 16pcs Polycarbonate Roof Panels cheapest?: At Walmart, for $169.99, as of our latest check.

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