Seasonal Window Maintenance Guide for the DMV Climate

Spring is the ideal time to inspect windows after the stresses of DMV winters. Cold temperatures cause thermal contraction that can open gaps in sealants and stress IGU seals.

Inspect all window perimeter caulking for cracks, gaps, or separation. Even small caulk failures allow water infiltration during spring rains. Re-apply exterior-grade silicone sealant wherever the existing caulk has failed.

Check weatherstripping for compression damage. Weatherstripping that spent a winter compressed often does not fully recover and may need replacement after 5 to 7 years.

Look for condensation on the interior glass surface during cool spring mornings — this indicates inadequate ventilation or very high interior humidity rather than seal failure if it can be wiped away from the surface.

Inspect single-pane windows for glazing putty that has cracked or fallen out during the winter freeze-thaw cycle.

DMV summers bring extreme heat and humidity — both of which stress window systems. Interior humidity should be controlled below 50 percent to prevent excess condensation on cool surfaces near windows.

Check that weep holes in window frames are clear and draining. These small slots at the bottom of window frames are designed to drain any water that gets past the window seals. Blocked weep holes lead to water accumulation and frame deterioration.

Apply shading devices (interior blinds, exterior awnings, or solar film) to south and west-facing windows to manage solar heat gain. This reduces air conditioning loads and keeps rooms comfortable.

Summer is an excellent time to schedule window replacement or upgrade projects — technicians have better access without extreme cold, and many common IGU sizes are in stock for fast turnaround.

Fall preparation is the most impactful seasonal maintenance investment for DMV homeowners. The time to find and fix problems is before the heating season, not during it.

Perform a complete draft inspection: on a windy day, move a lit incense stick slowly around all window frames and feel for air movement. Address any drafts with weatherstripping replacement or caulk application.

Inspect storm windows if present and install any seasonal interior storm inserts. Check that all hardware functions properly before temperatures drop.

Schedule professional window maintenance or replacement for any windows identified as problematic — technicians are typically less busy in September and October than during peak winter demand.

Monitor for frost on interior window surfaces during extreme cold snaps. Frost at window edges (on the frame) is normal. Frost on the glass center indicates very high interior humidity or a very poor-performing window that may need upgrading.

Check that window locks are engaged during the winter — a slightly open window wastes significant heating energy.

After major winter storms, inspect for damage: broken glass from ice or debris, frame movement, or water infiltration through previously compromised areas.