Elegant, Vinyl Windows and Doors by Kensington High Performance Products.  Maintenance-Free Beauty!

Your home is your castle, and the windows in your home are what connects you to the world! Let the beauty of the sun shine in, and keep the elements out where they belong. Beauty, efficiency and low maintenance is what you want your windows to provide. Bask in the sunlight shining into your home, while the harmful rays and energy loss are blocked by the engineered technology of Kensington High Performance Replacement Windows & doors!

Welcome to the Home of the Only Vinyl Window Manufactured in America with HEAT MIRROR™ Film Technology

Kensington High Performance Products is the EXCLUSIVE vinyl window fabricator of Heat Mirror™ Suspended Film Technology in the US. Best-In-Class Window Insulation Performance. Now, windows can insulate like a wall, with a clear view of a window.

Learn More About Heat Mirror™

  • 2018 Energy Star Most Efficient
  • Top 100 Energy Efficient Innovations of the Millennium
  • 99.5% UV Blockage
  • A Clear View to Energy Savings
  • Where can I buy?

Kensington HPP helps fulfill your architectural vision while extensively improving your family’s indoor comfort.


Sleek, elegant, handcrafted, energy-efficient replacement vinyl windows that enhance the beauty of your home.

Kingston 300 series

Vinyl replacement windows of impeccable quality, advanced thermal technology with classic architectural features.

Kingston 300 series

The Williamsport's high performance and designer options will fit in beautifully with your homes style and decor!

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Trusted by homeowners and contractors from the Atlantic to the Rockies

Kensington High Performance Products’ concept of building trust starts with the basics – produce the highest quality products in the most efficient manner and consistently deliver performance unmatched in the industry. Following this plan, the Kensington HPP line of beautiful, high performance repalcement windows and doors are the choice of thousands of knowledgeable, discerning homeowners, and the supplier of choice to numerous window professionals throughout the United States.

No worry, no hassles, and a lifetime of home comfort and enjoyment. Vinyl window products by Kensington HPP, Inc. are the answer to drafty rooms, leaky windows, and inoperable sashes. Never worry about your windows again as our limited lifetime warranty means you will be enjoying Kensington HPP’s high performance features for years to come. See the world in a better light.

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