D.C. Mun. Regs. tit. 10, r. 10-C2304

Current through Register Vol. 71, No. 49, December 6, 2024

Rule 10-C2304 - STORM WINDOWS AND WINDOW SCREENS

2304.1

The use of secondary windows or storm windows, either exterior or interior, is encouraged as a means of preserving historic windows. Under the D.C. Construction Code (12 DCMR § 111), a permit is required for the installation of storm windows in historic landmarks or in historic districts.

2304.2

Interior Storm Windows

(a) Storm panels should have no intermediate dividing members (mullions or muntins), except on large windows, where any necessary dividing members should align with major divisions of the historic window.

(b) Frames should be narrow and not visible or minimally visible when viewed from the exterior of the building.

(c) Glazing should be only of clear glass or other transparent material.

2304.3

Exterior Storm Windows

(a) Sash should fit tightly within window openings without the need for a subframe or panning around the perimeter.

(b) Sash should have no intermediate dividing members (mullions or muntins), except on large windows, where any necessary dividing members should align with major divisions of the historic window.

(c) Meeting rails should be used only in conjunction with double-hung windows and should be in the same relative location as in the primary sash.

(d) The color of the frame members should approximate the color of the primary window frame.

(e) Glazing should be only of clear glass.

(f) The plane of glass in the secondary (storm) sash shall be no more than two (2) inches further forward (towards the exterior) from the plane of the glass in the primary window unless unusual conditions make this infeasible.

D.C. Mun. Regs. tit. 10, r. 10-C2304

Notice of Final Rulemaking published at 51 DCR 7447 (July 30, 2004)