11 ft x 12 ft x 16.3 ft Right Triangle Shade Sail - Durable UV Block

In this review of the 11' x 12' x 16.3' right triangle shade sail from SHADESPEARE, the bottom line is simple: this canopy is for homeowners and DIY installers who need a durable, large triangular shade that blocks intense sun while remaining lightweight and ventilated. The biggest reason to buy is its construction-virgin polyethylene fabric engineered with slightly curved edges to prevent sagging-delivering up to 95% UV blockage and strong tensile strength for season-long outdoor use.

Key Features

• Corner-to-corner sizing: Measurements are taken from corner to corner so shoppers can plan mounting points accurately for the triangular layout.
• Curved edge design: Edges are made slightly curved using a calculated radian to reduce middle sagging for a neater look and improved water run-off.
• Material and strength: Made of virgin polyethylene, the sail is lightweight yet has strong tensile strength for long-term outdoor exposure.
• High UV blockage: Provides up to 95% UV blockage and about 90% visibility reduction to keep patios and pools cooler in direct sun.
• Seasonal versatility: Offers shading and ventilation in summer, anti-frost benefit at night, and light rain resistance during brief showers.
• Customizable and warranted: Available for custom orders and backed by a 3-Year Limited Warranty for added peace of mind.

Who It's For

This shade sail is best for homeowners with patios, pools, carports, balconies, or garden seating areas who want a large triangular canopy that blends coverage with airflow. It works well for people who prefer a low-maintenance fabric that resists UV degradation and keeps outdoor areas noticeably cooler.

Those who should look elsewhere include buyers needing a fully waterproof canopy or a permanent hard-structure shade; this sail offers only slight rain resistance and is designed as a fabric shade rather than a roof replacement. Also, applications requiring superb hardware integration may demand upgraded fittings beyond the included kit, as customer feedback on hardware was mixed.

Pros & Cons

Pros

• High UV protection provides effective cooling for pools and patios.
• Curved edges and correct sizing reduce sagging for a tidy, functional appearance.
• Durable virgin polyethylene construction balances strength with light weight.
• Custom order option and a 3-Year Limited Warranty add flexibility and assurance.

Cons

• Only slightly rainproof, so it is not a substitute for a waterproof awning in heavy storms.
• Included hardware received mixed reviews, so some users may prefer to purchase stronger fittings separately.

Specifications

Shape	Right triangle
Measured	Corner to corner
Dimensions	11' x 12' x 16.3'
Material	Virgin polyethylene
UV blockage	Up to 95%
Visibility reduction	About 90%
Warranty	3-Year Limited Warranty

Our Verdict

The 11' x 12' x 16.3' right triangle shade sail is a solid choice for outdoor shading where high UV protection, ventilation, and a tidy, non-sagging profile matter. It represents good value for homeowners who need large, customizable fabric shade and are comfortable using or upgrading mounting hardware for long-term performance.

Frequently Asked Questions

Will this sail keep a pool area noticeably cooler?
Yes, the high UV blockage and breathable fabric reduce direct sun exposure and help lower surface and air temperatures around a pool.

Is it waterproof?
No, it is only slightly rainproof and designed primarily for shading and ventilation rather than full rain protection.

Can I order a custom size?
Yes, all products from this line are available to be customized to fit specific mounting needs.