Historic One Lite Top Panel Fixed Bottom Inside Removable
This is our most energy-efficient, economical, and attractive exterior storm window. The top is fixed and the bottom removes directly to the inside of your home, allowing you to clean and interchange with a screen insert. (This is the best model for double hung windows.)

Alternatives for HOLOP

Unit of Measure


N/A Condensation Reduction – One of the most welcome benefits of storm windows is the reduction and perhaps elimination of condensation on the interior of the existing window. Any water or ice build up is certain to cause damage to walls, sills, and to the windows themselves

Energy Savings – Installing our exterior or interior storm windows over existing single-glazed windows will reduce your energy costs by approximately 50%.

Prime Window Protection – Not only will adding our exterior storm window to your existing window protect it from the elements, but also preserve its appearance and reduce the formation of condensation.

Sound Reduction – Sound reduction is the major “unexpected” benefit after installation of our storm windows. Many people are surprised at the dramatic reduction in outside noise.

Optional Storm Window Features

Interior Storm Window Option



N/A This operating unit has the same exterior appearance as the (HOL-B) unit. It provides ease of ventilation without interchanging panels. MORE INFO

Special Shape Units

N/A We have the expertise to accommodate windows of any shape for virtually all of our storm window models. Tempered glass is standard in all curve top, shaped units. MORE INFO

Standard or Custom Colors

N/A Allied Window does its own custom-color painting and can match virtually any color. MORE INFO

Low E

N/A This is an energy-saving coating which reflects heat outside during the warm months & reflects it back inside during the colder months. The result is added efficiency to your air-conditioning and heating units. There is a slight tint to Low-E glass.

The special pyrolytic coating on the glass can be cleaned carefully like regular glass. It reduces energy loss by about 20% when compared to clear glass.

Bowed Units

N/A We can provide bent/bowed glass, acrylic storm windows, and screens for any bowed window project. MORE INFO

Screens/ Ventilation

N/A Our screen frames are virtually indestructible as they are comprised of heavy solid-aluminum extrusions. Charcoal aluminum screen wire is our standard screen material; however, many requested options are available. (e.g. fiberglass, bronze, stainless steel, etc.) We’ll accommodate any custom situation, interior or exterior, including build-out, wicket, and sliding screens. MORE INFO

Stained & Leaded Glass Windows Protection

N/A Allied Window can increase the level of protection from the destructive forces of nature and the destructive forces of man - for the window itself, as well as the people and property inside the building. MORE INFO

Sound Reduction

N/A Our capabilities exceed what we can show you on our website. Please contact us to discuss solutions for your specific needs. CONTACT US

UV Protection

N/A Our capabilities exceed what we can show you on our website. Please contact us to discuss solutions for your specific needs. CONTACT US