- All weather-stripping will be enduringly installed with fasteners (tacks, staples, brads, etc.) and will make helpful contact between surfaces to stop air leakage.
- Window weather-stripping
- “Three-sided:” LOWER sash channels, & sill; or, if the window has spring-loaded channels: top, bottom, and meeting rail.
- “Four-sided:” LOWER sash channels, meeting rail & sill
- “Seven-sided:” UPPER & LOWER sash channels, meeting rail, sill & head jamb
- The weather-stripping will make an air-tight seal when the window is closed and latched. A small bead of caulk will be useful as it is essential to avoid air leakage behind the weather-stripping.
- The weather-stripping will not delay the smooth operation of the door or window.
- Attic hatch or scuttle openings
- Weather-stripping will be permanently affixed to hatch or framing. Generally “Qlon with carrier” or equivalent is preferred.
- A positive closing mechanism will be installed on the hatch if needed.
- Existing access to the attic will be maintained. d. In the case of drop-down folding stairs, an air-tight, insulated cap will be built over the opening.
- Knee wall access doors will be treated like attic hatch doors whenever possible.