Custom Size 13ft x 21ft White Rectangle Sun Shade Sail - Tight

Our review of this custom 13' x 21' white rectangle sun shade sail finds it best for homeowners who need a tailored, heavy-duty cover for patios, pools, or carports. The single biggest reason to buy is the precise fit: measurements are taken corner to corner and the sail's curved edges resist sagging, delivering a clean, tensioned look that stays put. Built from virgin polyethylene, it blocks most UV and sightline while remaining light enough for straightforward rigging, making it a strong choice for seasonal and year-round outdoor use.

Key Features

• Made for a Perfect Fit: Corner-to-corner measurements and curved edges are designed to minimize sagging and maintain a taut appearance over time.
• Durable UV-Blocking Material: Constructed from virgin polyethylene, the fabric blocks up to 95% of UV rays and reduces visibility by about 90% for cooler shaded areas and privacy.
• All-Season Performance: Suitable for summer sun protection, cooler nights that reduce frost buildup, and light rain coverage on patios and pools.
• Custom Sizes Available: Locally made to order so the sail can be tailored to nonstandard spaces like irregular patios or long carports.
• Warranty Support: Backed by a 3-year limited warranty that adds confidence for buyers planning a multi-season installation.

Who It's For

This shade sail is for homeowners and small businesses that need a large, customized rectangle sail to cover specific areas such as patios, driveways, carports, or poolside seating. Installers who value a tight, clean look and who can take accurate corner-to-corner measurements will get the best results.

It is less appropriate for people wanting instant off-the-shelf sizes without measurement or for those who need full waterproof protection in heavy rain; this product is designed for sun, light rain, and temperature reduction rather than as a heavy-weather awning.

Pros & Cons

Pros

• Excellent fit and tension when measured corner to corner, reducing sag and wind flap.
• High UV protection that noticeably lowers heat under the sail and improves comfort.
• Durable virgin polyethylene construction that balances light weight with strength and long life.
• Custom fabrication and local production help ensure timely delivery and accurate sizing.

Cons

• Installation can be mixed in difficulty depending on mounting points and may require additional hardware or help to achieve the intended tight fit.
• Not intended as a fully waterproof solution for heavy storms or extended wet weather.

Specifications

Model Size	13' x 21' rectangle
Material	Virgin polyethylene
UV Protection	Blocks up to 95% of UV rays
Visibility Reduction	Approximately 90% visibility blocked
Edge Design	Curved edges to prevent sagging
Warranty	3-year limited warranty
Customization	Custom sizes made locally on order

Our Verdict

For those who need a large custom-fit shade sail, this 13' x 21' model offers solid value: it combines reliable UV blocking, durable yet lightweight construction, and a design that minimizes sag when measured correctly. Buyers willing to measure carefully and invest in proper mounting will get a long-lasting, attractive shade that improves outdoor comfort and privacy.

Frequently Asked Questions

How should I measure for a perfect fit?
Measure corner to corner for the two diagonal distances as specified and allow for mounting point offsets so the curved edges can tension the fabric.

Is this sail waterproof?
The sail provides light rain coverage but is not designed as a fully waterproof solution for heavy or prolonged rain.

What kind of warranty is included?
The product includes a 3-year limited warranty that covers manufacturing defects under normal use.