Leading Interior Design Blogger, Stacey Sheppard, Discusses How to Choose Conservation Rooflights for Historic & Listed Buildings
Modernising a historic or listed property presents unique challenges. These projects are often complex, with restrictions that can limit repair and maintenance options. While these buildings offer undeniable charm and character, taking on their renovation requires a careful, informed approach.
One critical consideration in such renovations is the choice of rooflights. In this blog, our resident interior design expert, Stacey Sheppard from The Design Sheppard explores how to select the right conservation rooflights to maintain the balance between modern functionality and historic aesthetics.
What is a Listed Building?
Before diving into rooflight selection, it’s important to understand what makes a building “listed.” According to Historic England, a listed building is one of special architectural or historic interest. Such buildings are nationally significant and protected by the Planning Act 1990 to prevent unauthorized demolition, alteration, or extension. This ensures that any changes maintain the building’s unique character.
Listed buildings are typically older structures—those built before 1700 are almost always listed, while buildings constructed after 1945 are rarely included. Properties under 30 years old are almost never listed. Renovating these structures demands respect for their architectural integrity, requiring thoughtful choices for features like conservation rooflights.
What Are Conservation Rooflights?
Conservation rooflights are modern interpretations of the slim, single-glazed rooflights popularised during the Victorian era. These designs introduced natural light into buildings while maintaining a minimalist and unobtrusive appearance. Today’s conservation rooflights replicate this aesthetic while offering modern performance benefits.
Understanding Conservation Guidelines and Regulations
Historic and listed buildings are subject to strict planning laws and conservation regulations. While the installation of conservation rooflights often falls under permitted developments, there are requirements that must be met:
- Rooflight Placement: Rooflights must not protrude above the highest point of the existing roof.
- Distance from Roof Plane: Installed windows must maintain a distance less than 150mm above the current roof plane.
- Openable Windows: These must be situated no lower than 1.7m above the floor and comply with privacy requirements if side-facing.
In some cases, local planning authorities issue an Article 4 Direction to restrict permitted development rights, requiring planning permission. It’s always advisable to consult planning authorities and ensure compliance with Building Regulations, particularly regarding structural alterations, energy efficiency (Part L), fire safety (Part B), and protection from impact (Part K).
Consulting the Local Planning Authority
Navigating these regulations can be overwhelming, making expert guidance invaluable. Local Conservation Officers possess extensive knowledge about planning permission and building regulations, helping streamline the process and avoid costly mistakes.
Material Considerations for Conservation Rooflights
The choice of material significantly impacts the durability, performance, and appearance of conservation rooflights. Common options include:
- Wood: Offers a traditional aesthetic but requires regular maintenance to prevent rot.
- Aluminium: Durable and low-maintenance, ideal for modern performance.
- Steel: Combines strength with slim frames, maximizing glass area. For wet or coastal climates, 316L stainless steel is recommended for its resistance to corrosion and rust.
Fixed or Opening Rooflights?
The decision between fixed and opening rooflights depends on functionality and budget:
- Fixed Rooflights: Cost about 30% less, offer better thermal efficiency, and allow for a larger viewable area.
- Opening Rooflights: Enhance ventilation and roof access, with options for manual, electric, or sensor-based operation. However, they are more expensive and complex to install.
Combining fixed and opening rooflights can provide versatility while managing costs.
Choosing the Right Glass
Selecting the right glass for your rooflights is crucial. Consider:
- Thermal Performance: Energy-efficient options to reduce heat loss.
- Safety: Laminated glass enhances security.
- UV Protection: Prevents fading of interiors.
- Self-Cleaning Glass: Reduces maintenance requirements.
- Solar Control: Minimizes overheating, eliminating the need for blinds or air conditioning.
Bespoke Rooflights for Unique Properties
Historic and listed buildings often have irregular features, such as unevenly spaced rafters. Bespoke rooflights allow for tailored designs that match the unique characteristics of the property, ensuring an authentic and harmonious appearance.
Weighing Your Options
Selecting conservation rooflights for historic or listed buildings requires balancing performance, aesthetics, safety, and budget. With support from manufacturers, architects, and conservation officers, you can make informed decisions to preserve the character and integrity of your property while meeting modern standards.
