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Restoring Old Windows: A Sustainable and Cost-Effective Solution for Historic Homes
When it comes to preserving the character of historic homes, the decision between restoring or replacing old windows can be a challenging one. Here are some key factors to consider for energy efficiency, cost-effectiveness, and sustainability.
Energy Efficiency Potential
Restored historic windows, particularly double-hung types, can perform well when paired with upgrades such as weatherstripping and storm sashes. These improvements can offer comparable energy efficiency to new windows, reducing energy bills by up to 15% [1][2].
Longevity and Durability
With modern restoration techniques, historic windows can last another 100 years or more, maintaining their structural integrity and functionality [3].
Environmental Impact and Sustainability
Restoration generates less waste and has a smaller carbon footprint than replacement, as it avoids discarding existing window materials [1][3].
Historical and Aesthetic Value
Maintaining original windows preserves the historic character and craftsmanship unique to the home, which can be lost with replacement [1][3].
Cost Considerations
Restoration can be more cost-effective initially compared to full window replacement, especially when damage is limited to glass or hardware that can be repaired or replaced individually [5]. However, extensive damage or decay may lead to higher restoration costs.
Performance Factors
Window performance depends on controlling air leakage, heat transfer, and solar radiation. Restoration efforts should focus on sealing leaks and adding insulation or storm windows to optimize these factors [4].
In summary, for historic homes, restoring windows is often more sustainable, cost-effective, and better at preserving architectural integrity while still achieving energy efficiency when combined with modern restoration techniques and weatherproofing. Replacement with new energy-efficient windows may be warranted if windows are severely deteriorated or restoration costs are prohibitive [1][3][4].
Restoration Process
For capable DIYers, restoring old windows can be a suitable project for minor damage. This process includes evaluating the windows to determine whether they're good candidates for restoration, removing old paint, glazing, and hardware, repairing or replacing components as needed, and installing glazing points evenly around the edge of the glass [6].
Installing storm window inserts, upgrading to energy-efficient windows, and replacing sash cords, sash weights, or pulleys can also help improve energy efficiency and reduce utility bills [7].
If the window frames are made from quality wood and just need some reglazing or weatherproofing, restoration can preserve charm and function while maintaining the home's character [8].
Costs
The national average window repair cost ranges from $100 to $800, according to Gal Cohen, the field area manager at JDM Sliding Doors. The cost to replace window glass is about $300-$700 per window [9].
In cases where the damage is minor and the restoration cost is lower than the replacement cost, restoration makes sense. However, if the windows are severely damaged or the energy bills remain high despite adding storm window inserts, it may be time for new windows [10].
[1] Energy.gov - Historic Windows: Energy Efficiency
[2] Energy.gov - Save Energy with Storm Windows
[3] National Trust for Historic Preservation - Caring for Your Historic Windows
[4] National Renewable Energy Laboratory - Window Energy Efficiency Standards
[5] This Old House - Restoring Old Windows
[6] This Old House - Restoring Old Windows
[7] Energy.gov - Save Energy with Storm Windows
[8] This Old House - Restoring Old Windows
[9] HomeAdvisor - How Much Does It Cost to Replace a Window?
[10] Energy.gov - Save Energy with Storm Windows
- In the process of restoring old windows, DIYers may find the task suitable for minor damage, involving tasks such as evaluating, removing old components, repairing or replacing necessary parts, and installing glazing points.
2.he national average cost for window repair, according to JDM Sliding Doors, ranges from $100 to $800, making it a more cost-effective option compared to full window replacement, which costs about $300-$700 per window.
- For old windows made from quality wood that just need reglazing and weatherproofing, restoration can help preserve the window's charm and functionality while maintaining the home's unique character.
- Installing storm window inserts and upgrading to energy-efficient windows can aid in improving energy efficiency and reducing utility bills, but if windows are severely damaged or the energy bills remain high despite these improvements, it may be time for new windows.
