Certified Chinese uPVC Windows Manufacturer

Reliable Chinese uPVC windows manufacturer

Looking for a reliable supplier of high-performance, cost-effective windows for your U.S. projects? At Grandsea, we manufacture and export custom uPVC (vinyl) windows designed for importers, wholesalers, builders, and developers across the United States.

Our uPVC windows combine long-term durability, modern aesthetics, and superior energy efficiency, making them ideal for large-scale residential and commercial projects. Whether you need bulk orders for new construction or replacements for renovation projects, Grandsea delivers windows that meet U.S. quality standards—providing your business with competitive pricing, consistent supply, and OEM/ODM customization options.

Excellent energy-saving performance

Our uPVC windows adopt multi-cavity design and high-performance sealing strips to provide excellent thermal insulation.

Super durability

Using high-quality uPVC materials, it is resistant to UV, corrosion and weathering, with a service life of more than 30 years without frequent replacement.

Diverse design options

Provide a wide range of colors, textures and styles, from classic white to imitation wood grain effects, to meet the aesthetic needs of different customers and suitable for various architectural styles.

Excellent sound insulation effect

The special frame structure and double or triple glass design effectively block external noise and create a quiet and comfortable indoor environment for you.

Low maintenance requirements

uPVC materials themselves have dust and stain resistance, and can be kept as new with a simple wipe on a daily basis. No need for regular painting or waxing, which greatly reduces maintenance costs.

Environmentally friendly and safe

All materials meet strict environmental standards, do not contain harmful substances such as lead, are recyclable, and are an environmentally responsible choice.

Classic Series Double Glazed uPVC Window UPV-100

This classic series uPVC window adopts a 5-cavity design, providing excellent thermal and sound insulation performance. 24mm double-layer Low-E glass with argon filling effectively blocks heat transfer.

Luxury Series Triple Glazed Smart uPVC Window UPV-200

This luxury series smart uPVC window uses top-quality materials and cutting-edge technology, tailored for customers who pursue ultimate quality. The 7-cavity design combined with triple glazing provides unparalleled energy-saving performance.

Why Contractors and Developers Choose Grandsea uPVC Windows

Proven Experience & Trusted by Professionals

With over 800+ completed projects, a dedicated team of 100+ skilled professionals, and more than 2,500 satisfied business clients worldwide, Grandsea is a recognized manufacturer and exporter of uPVC windows for the U.S. market. Our products are designed to meet the needs of importers, wholesalers, contractors, and developers who demand both quality and consistency.

Built for the American Climate

From the heat of Arizona to the freezing winters in Minnesota, our uPVC windows are engineered for maximum thermal insulation, UV resistance, and weather durability.

Multi-chambered frames with optional foam-filled insulation
Double or triple glazing with argon gas fill
Protection against drafts, moisture, and solar heat gain

Energy Star-Ready Performance

Our window systems are designed to meet or exceed U.S. energy efficiency standards, including:

Low U-values for better insulation
High SHGC ratings (Solar Heat Gain Coefficient) control
Optional low-E coatings and argon/krypton-filled glazing

Reduce heating and cooling costs while improving indoor comfort all year round.

Custom uPVC Window Solutions – Designed to Fit Your Vision

uPVC (unplasticized polyvinyl chloride) is a recyclable, synthetic material that allows for total design freedom with low maintenance and long-term durability.

Choose from a variety of options to match your home or commercial space:

Feature	Customization Options
Shapes & Styles	Rectangular, arched, round, triangular, trapezoidal
Opening Types	Casement, awning, tilt-turn, fixed, sliding, double-hung
Colors & Finishes	RAL color range via foil coatings; woodgrain textures available
Glass Options	Double/triple glazing, low-E, frosted, laminated, acoustic
Hardware & Accessories	Multi-point locks, child safety locks, insect screens, grids
Frames	uPVC, uPVC + Aluminum Cladding, or composite

Our factory uses precision fabrication to meet exact U.S. sizing standards, ensuring quick, easy installation.

Superior Insulation, Noise Control & Weather Resistance

Thermal Insulation

Multi-chamber uPVC profiles act as a barrier against heat loss
Argon or krypton-filled sealed units for improved insulation
Optional warm-edge spacers to reduce condensation

Acoustic Performance

Soundproof glazing options reduce street noise and environmental disturbance
Perfect for urban homes, apartments, or properties near highways and airports

Weather Protection

UV-resistant profiles and foil coatings prevent fading
Water-tight seals protect against heavy rain and wind infiltration
Certified resistance to warping, rusting, or swelling over time

Beautiful Windows That Don’t Sacrifice Performance

Who says energy-efficient windows can’t look great? Our uPVC windows offer a clean, modern look and can be customized to match traditional or contemporary American architecture, including:

Modern Farmhouse
Cape Cod
Craftsman Bungalow
Transitional
Mid-Century Modern

With dozens of frame colors, grid patterns, and glass designs, you can create windows that elevate your curb appeal without compromising on insulation or safety.

Security That Meets Today’s Standards

Multi-point locking systems
Impact-resistant glass options
Reinforced frames for added structural integrity
Compatible with smart home security systems

Our windows provide the peace of mind you expect from modern fenestration products.

Ideal for Renovation & New Construction

Whether you're:

A building owner upgrading your windows for energy savings,
A contractor working on a spec home, or
A developer managing a multi-family project,

Grandsea has the production capacity, customization capabilities, and pricing flexibility to meet your needs.

Our Project

Chicago

Sydney

Los Angeles

Melboume

Wales

Vancouver

FAQ'S About uPVC windows

How long is the lifespan of uPVC windows?

The average lifespan of our uPVC windows is 20-25 years. As a professional window manufacturer, we use high-quality raw materials and advanced technology to ensure that the windows have excellent durability. We also provide a 10-year warranty to give you peace of mind.

How effective is the sound insulation of uPVC windows?

Our uPVC windows have excellent sound insulation properties. According to experimental measurements, our double glazing can significantly reduce external noise. For customers with special needs, we can also provide specially designed high-performance soundproof glass.

Are uPVC windows energy efficient?

Yes, our uPVC windows are very energy efficient. We use advanced Low-E glass and argon-filled double or triple glazing to minimize heat loss. Our windows all meet Class A energy efficiency standards and can help you significantly reduce your energy bills.

What colours are available for uPVC windows?

As a specialist manufacturer, we offer hundreds of colours, from standard white to traditional mahogany and golden oak, as well as increasingly popular modern shades such as grey, green, cream and black. All colours can be chosen to be the same inside and outside or coloured on the outside and white on the inside.

Are uPVC windows suitable for seaside areas?

Yes, our uPVC windows are ideal for seaside areas. They are corrosion-resistant and have excellent water and weather resistance. Compared with other materials, uPVC windows do not require painting and are easy to maintain, making them an ideal choice for seaside homes.