12 ft x 13 ft x 17.7 ft Gray Right Triangle Shade Sail - UV Block

In this review of the 12 ft x 13 ft x 17.7 ft Gray Right Triangle Shade Sail from SHADESPEARE, the bottom line is simple: this canopy is for homeowners and renters who need a reliable, breathable sun screen that covers irregular outdoor spaces without looking baggy. The reviewer found the most compelling reason to buy is the engineered curved edges and strong virgin polyethylene fabric, which together prevent center sagging while blocking up to 95% of UV - a practical combination for long summer use and cooler outdoor areas.

Key Features

• Corner-to-corner measurement: Sizes are taken from corner to corner so buyers can match the sail to existing anchor points for accurate coverage.
• Curved edge design: Slightly curved edges follow a calculated radian to maintain tension and prevent the fabric from sagging in the middle.
• Virgin polyethylene fabric: The lightweight, high tensile material offers strong durability while remaining breathable for ventilation and cooling.
• High UV blockage: The canopy provides up to 95% UV blockage and about 90% visibility reduction for better sun protection and privacy.
• All-season utility: It shades and cools in summer, reduces frost overnight, and offers slight rain resistance during wet weather.
• Custom and warranty support: Available for custom orders and backed by a 3-year limited warranty, useful for tailored installations.

Who It's For

This shade sail suits homeowners with patios, pools, driveways or carports who need a durable, well-shaped canopy that resists sagging and reduces UV exposure. It is also a good choice for gardeners and landlords who want a low-weight, ventilated cover that still performs under seasonal weather.

Those who need a fully waterproof awning, a rigid canopy, or a decorative option with built-in lighting should look elsewhere; this product is designed for shading and light weather protection rather than complete rainproofing or a decorative pergola replacement.

Pros & Cons

Pros

• Effective UV protection and privacy due to up to 95% UV blockage and 90% visibility reduction.
• Formulated edges and corner-based measurement reduce sagging and deliver a cleaner, tighter installation.
• Durable virgin polyethylene construction balances tensile strength with lightweight handling for easier mounting.
• Backed by a 3-year limited warranty and available for customization if standard sizes do not fit.

Cons

• Hardware reports are mixed, so buyers may need to evaluate mounting kit quality or source heavier fittings for certain installations.
• Only slightly rainproof; not suitable as a full waterproof shelter in heavy rain.

Specifications

Shape	Right triangle
Size (corner to corner)	12 ft x 13 ft x 17.7 ft
Color	Gray
Material	Virgin polyethylene fabric
UV blockage	Up to 95%
Visibility reduction	About 90%
Warranty	3-Year Limited Warranty

Our Verdict

The 12 ft x 13 ft x 17.7 ft gray right triangle shade sail is a practical choice for anyone who needs reliable sun protection with a neat, tensioned appearance. It provides excellent UV shielding, good durability, and easy handling for backyard, poolside, or carport use, making it a solid value for buyers who prioritize shade performance over full rainproofing.

Frequently Asked Questions

How is the size measured?
Size is measured from corner to corner so you should measure your intended anchor points before ordering to ensure proper fit.

Is the fabric waterproof?
The polyethylene is slightly rainproof but not fully waterproof; it is designed primarily for shading, cooling and light weather protection.

Does it arrive with hardware?
Some hardware is included, but customer feedback is mixed, so consider upgrading mounting fittings for heavier or permanent installations.