Business Details
Your Trusted Delaware Vinyl Window & Door Supplier
Delaware Window Supply is a full-service window and patio door supply company dedicated to delivering quality replacement windows and doors that keep projects on time and within budget. Established in Newark, Delaware, we specialize in providing custom vinyl window and door solutions for contractors and homeowners across the Maryland/Delaware/Pennsylvania tri-state area. With a focus on energy efficiency and durability, our products are designed to enhance home comfort while reducing energy costs.We pride ourselves on professional service, fast turnaround times, and competitive pricing with no sales tax. Our commitment to quality is reflected in our partnerships with industry leaders like Slocomb Windows and Doors, ensuring our offerings meet rigorous ENERGY STAR and NFRC certification standards.
Services
Replacement Windows
Patio Doors
Energy-Efficient Windows
Custom Vinyl Solutions
Contractor Support
Highlights and features
- We offer over 20 years of experience in custom vinyl window solutions.
- Our ENERGY STAR-certified products reduce energy costs by up to 30%.
- We provide lifetime manufacturer warranties on all window and door systems.
- Our team serves Delaware, Maryland, Pennsylvania, and Southern New Jersey.
- We guarantee fast turnaround times with competitive, tax-free pricing.
Associations and certifications
- ENERGY STAR
- NFRC Certified
- Made in USA Certified
Services
Replacement Windows
Delaware Window Supply offers durable vinyl replacement windows designed to enhance energy efficiency and curb appeal. Our custom-fit solutions reduce drafts and lower utility bills while maintaining aesthetic flexibility with options like Low-E glass and woodgrain finishes. Backed by ENERGY STAR certification and lifetime warranties, these windows provide long-term value for homeowners seeking comfort and cost savings.
Patio Doors
Our premium vinyl sliding patio doors combine durability and energy efficiency with sleek designs. Featuring heavy-duty construction, multi-point locking systems, and optional Low-E glass, these doors ensure security and thermal performance. Backed by a lifetime warranty, they deliver decades of reliable operation while enhancing home aesthetics and outdoor connectivity.
Energy-Efficient Windows
Engineered to meet strict ENERGY STAR requirements, our energy-efficient windows incorporate advanced technologies like Low-E coatings, argon gas insulation, and warm-edge spacers. These features minimize heat loss in winter and heat gain in summer, reducing energy consumption by up to 30% compared to older models while maintaining year-round indoor comfort.
Custom Vinyl Solutions
We specialize in custom vinyl windows and doors tailored to precise architectural and functional needs. With options for grid patterns, colors, and hardware finishes, our solutions accommodate diverse design preferences. Fusion-welded frames and steel reinforcements ensure structural integrity, while customization guarantees seamless integration with existing home structures.
Contractor Support
Delaware Window Supply provides contractors with comprehensive support including NFRC-certified product specifications, installation guidelines, and technical resources. Our wholesale services ensure timely delivery of high-quality materials, backed by industry partnerships and compliance with ENERGY STAR and local building codes for hassle-free project execution.
Questions
What makes Delaware Window Supply’s windows energy efficient?
Our windows feature Low-E glass, argon gas fills, and warm-edge spacers to reduce heat transfer and meet ENERGY STAR standards.
Do you offer warranty coverage on your products?
Yes, all products include a transferable Limited Lifetime Manufacturer’s Warranty with additional Good Housekeeping Seal protection.
What areas do you serve?
We serve contractors and homeowners in Delaware, Maryland, Pennsylvania, and Southern New Jersey.
What types of windows do you offer?
We provide double-hung, slider, casement, awning, bay, bow, and picture windows in customizable styles.
Can I get custom-sized windows?
Yes, we specialize in custom replacement windows tailored to fit existing openings precisely.
Reviews (2)
Justin Nieves
Apr 10, 2018
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We, HomeStar Remodeling, use this window supplier exclusively. Great value, great service, professional, helpful, they get a thumbs up from me!
Fred Straka
Apr 29, 2017
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Great Prices, they are willing to work with inexperienced buyers to make sure you get the right product
