Upgrade your home's protection and style with Timberline HDZ White Algae Resistant Shingles. These laminated shingles are not only durable and long-lasting, but also resistant to algae, ensuring a clean and attractive roof for years to come. Each bundle covers 33.33 sq. ft. and includes 21 high definition pieces. Add beauty and strength to your home with Timberline HDZ White Algae Resistant Shingles. These laminated shingles provide long-lasting protection against algae, keeping your roof visually appealing for years. Each bundle covers an impressive 33.33 sq. ft. and contains 21 high definition pieces, guaranteeing that your roof will stand out in both function and fashion.