The choice between DIY repairs and professional services significantly impacts both project costs and performance outcomes. Many window and door improvements fall within typical homeowner capabilities, while others require specialized tools and expertise for optimal results.
DIY Window Improvements ($25-$200 per window)
Basic Weatherstripping Installation
Rope caulk provides temporary sealing for $2-5 per window, ideal for winter protection while planning permanent improvements. Apply around window perimeter where sash meets frame, removing in spring to avoid adhesive residue.
Advanced Weatherization Techniques
V-strip weatherstripping creates durable seals for double-hung windows at $8-15 per window. Installation requires careful measurement and fitting but provides multi-year performance. Felt weatherstripping costs less ($3-8 per window) but requires annual replacement.
Interior Storm Window Installation
DIY interior storm windows using clear acrylic panels and magnetic strips cost $15-35 per window while providing 25-35% energy improvement. These removable storms allow access for cleaning and summer storage while significantly reducing air infiltration.
Window Film Application
Low-E window films reduce heat transfer while maintaining visibility at $5-12 per square foot. Professional-grade 3M films provide 15-25% energy savings with 10-year warranties. Proper installation requires careful surface preparation and squeegee technique to avoid bubbles.
Professional Window Services ($150-$800 per window)
Sash Restoration and Weatherization
Professional restoration of quality wood windows includes sash rebuilding, hardware replacement, and comprehensive weatherstripping for $200-500 per window. This approach preserves historic character while achieving 60-80% of replacement window performance.
Glass Replacement and Upgrades
Installing insulated glass units in existing frames costs $150-300 per window when frames are in good condition. This partial upgrade approach provides substantial energy improvements while avoiding full replacement costs.
Storm Window Installation
Custom exterior storm windows cost $150-400 per window installed but can reduce energy loss by 25-45% when combined with interior weatherization. Quality storms provide 15-25 year service life with minimal maintenance requirements.
Door Improvement Strategies
Weatherstripping Replacement ($15-50 per door)
Door weatherstripping replacement dramatically improves energy performance at minimal cost. Magnetic weatherstripping for steel doors ($25-40) provides superior sealing compared to traditional rubber strips ($15-25). Adjustable threshold weatherstripping ($30-50) eliminates bottom gaps while accommodating seasonal movement.
Door Bottom Sealing Solutions ($10-35 per door)
Door sweeps provide basic bottom sealing for $10-20, while automatic door bottoms ($25-35) create superior seals that retract when opening. Threshold replacement ($40-80 installed) may be necessary for doors with significant bottom gaps.
Core Insulation Upgrades ($50-150 per door)
Hollow core doors can be upgraded with spray foam insulation through discreet holes, improving R-value from 2 to 4-5. This modification costs $50-100 in materials plus labor, providing meaningful thermal improvement at modest cost.