Custom New or Replacement Windows

The Classic Williamsport Line Installed by Roeland Home Improvers

The Williamsport vinyl window Line, improve the energy efficiency of your home while adding beauty with its classic architectural appeal. These beautiful windows not only give you the indoor comfort you desire but can help reduce your heating and cooling use.

Every Kensington Home Performance Products' window is crafted using finest fusion welded extruded vinyl frames, making them stronger and more durable than traditional aluminum windows, without the high cost of maintenance required by wood. Quality construction is what homeowners come to expect from Kensington HPP, and all of our windows meet those standards.

Innovative Window Technology

Every Williamsport window style improves thermal performance and can reduce energy expenses

The Anatomy of Energy Efficiency

At the heart of a Kensington HPP, a window is a cutting-edge, energy-efficient technology that features an advanced insulating glass package optimized to enhance the overall performance of your window. In combination with thermally-insulated frames, KGT - Glass creates some of the most energy-efficient replacement windows in the industry - the right windows for your home and your budget!

  1. Triple Glazed glass packs exceed thermal glazed glass systems found most commonly in wood and new construction vinyl windows today. In addition to the improved thermal improvements, the third pane acts as an additional noise barrier.
  1. A combination of inert gases are used to fill the dual insulating glass vacities. These harmless gases provide a superior insulating capability against the transfer of ehat of cold from the outside.
  2. Our CFC-free closed cell foam-filled frame and sash are virtually maintenance free and made from pure first run vinyl offering greater durability, strength and thermal insulation not found in traditional window materials.
  3. The Williams, powered by Kensington glass, features a warm edge spacer system and state of the art sputter coating applied to the glass surface that together reduces condensation and improves thermal efficiency to add to the comfort level in your home.


  • R-4. 2 full-frame double hung windows
  • Improved comfort with less draft in winter and reduced solar heat in the summer
  • Improved home energy efficiency
  • Contemporary Frame for added curb appeal
  • Reduced condensation
  • UV protection to reduce fading
  • Reduced air and water infiltration
  • Foam-filled frame


  • Kensington HPP with triple glazing technology to boost thermal performace* for increaded indoor comfort-warmer in the winter and cooler in the summer
  • Industry Leading Whole Window R Values as high as 4.8 in the DH and 5.3 in the PW.
  • UV protection reduces damage and fading to floor fine art, and furniture
  • Helps to increasse the energy efficiency of your home
  • Reduced condensation
  • Curb appeal for your home
  • Limited lifetime warranty
Quantum2 Energy Star Award

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Our Service Area
Our Locations:

Northern NJ

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Awards and Affiliations

  • AAMA certified
  • EPA Lead Safe Certified Firm
  • GAF Certified Weather Stopper Roofing Contractor
  • GAF Master Elite
  • Owens Corning Platinum Preferred
  • VSI Certified
  • HomeAdvisor Screened & Approved