Architectural design in Skylights and Lightwells
Introduction:
Architects must pay close attention to the design of skylights and lightwells as they play a crucial role in introducing natural light into a space and enhancing the aesthetic and functionality of a building. In this blog post, we will explore key considerations and design approaches for framing skylights and lightwells, providing valuable insights for architects at all stages of their careers.
Framing Skylights:
When it comes to skylights, size Matters When it comes to designing skylights, the size of the opening plays a significant role in determining the complexity of the framing required. Here are two primary framing approaches:
Small Skylights: Simple and Straightforward For skylights that fit between rafters or trusses on standard 24-in. o. c. spacing, the framing process is relatively simple. No cutting of rafters or ceiling joists is necessary, making the construction process straightforward and efficient.
Large Skylights: Extensive Work and Unique Techniques When dealing with larger skylights, a different framing technique is required. These openings demand more extensive work, both in terms of planning and construction. Additional considerations must be given to the openings and lightwells, ensuring proper integration with the building's structure.
Planning the Skylight Well:
The skylight well, which connects the roof and ceiling openings, requires careful planning to ensure optimal insulation and maintenance of a continuous thermal layer. Consider the following factors:
Thermal Considerations: Frame the skylight well using construction that allows for insulation while maintaining a continuous thermal layer. This ensures energy efficiency and proper insulation.
Ceiling Configuration: If your project lacks a ceiling, such as in an open-beam roof, focus on framing the skylight well only at the roof layer. Adjustments can be made based on the presence or absence of a ceiling.
Size Variations: The size of the ceiling opening and the design of the well can vary. Consider the specific requirements of your project and adapt the design approach accordingly.
Design Approaches for Skylight Wells:
To maximize the dispersion of natural light within a space, architects can adopt various design approaches for skylight wells. Here are three common strategies:
1. Simple Approach for Well Depth < 2 ft.
Extend all four sides of the well down at a 90° angle to the roof slope.
The ceiling opening becomes longer than the roof opening but maintains the same width as the skylight.
This approach allows for greater dispersion of light inside the space.
2. Splayed Shape for Well Depth > 2 ft.
Run the high end of the well 90° to the roof slope while keeping the lower end plumb.
The ceiling opening becomes longer than the roof opening but maintains the same width as the skylight.
This design facilitates increased light dispersion throughout the space.
3. Increased Ceiling Opening for Enhanced Light Distribution
The width and length of the ceiling opening exceed that of the roof opening.
This approach significantly increases light distribution.
Construction complexity is higher due to compound angles and potential structural work, such as cutting more joists.
Particularly suitable when using a small skylight to optimize light dispersion.
Conclusion:
Designing skylights and lightwells requires a thoughtful approach that addresses both technical considerations and the desired aesthetic outcome. Remember to assess the specific requirements and constraints of your project to determine the most suitable approach for framing skylights and lightwells. Implementing these design techniques will ensure the effective use of natural light and transform spaces into inspiring environments.
Written by D.TO: Design TOgether
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