Should I Get a Fixed (Non-Opening) Skylight or One That Opens?
When planning a new skylight or rooflight for your home, one of the first questions to ask is: “Should I get a fixed (non-opening) model or one that opens?” The correct answer depends on your room's size, ventilation needs, and design goals.
In this guide, we compare fixed vs opening skylights, help you understand when each works best, and provide real customer and expert insights — so you can make a confident decision for your next project.
Table of Contents
Quick Answer: Fixed vs Opening Skylights
| Feature | Fixed Skylight / Rooflight | Opening Skylight / Roof Window |
|---|---|---|
| Ventilation | ❌ No (requires separate extractor) | ✅ Yes – manual or electric options |
| Design Aesthetic | ✅ Frameless, ultra-minimal | ❌ Often framed and more visible inside |
| Maintenance | ✅ Low – no moving parts | ❌ More components to clean/maintain |
| Cost | ✅ More affordable | ❌ Higher due to mechanism/electronics |
| Energy Efficiency | ✅ Higher (airtight seal) | ❌ Slightly lower due to openings |
| Best for | Kitchens, stairwells, dining areas | Bathrooms, lofts, bedrooms |
What Is a Fixed Rooflight or Skylight?
A fixed skylight or rooflight is a non-opening glass unit designed solely to admit light. Frameless models, such as those from Regal Glass Group, sit flush with the ceiling or roofline and are perfect for modern flat roof extensions or clean, architectural interiors.
✅ Advantages:
Sleek appearance
Higher thermal performance (low U-values)
No moving parts to fail or maintain
Suitable where ventilation is handled separately
🔧 Best used when:
You have mechanical ventilation (e.g., extractor fan in a bathroom or cooker hood in a kitchen)
You want uninterrupted light with a minimalist finish
You don’t need roof access
What Is an Opening Skylight or Roof Window?
An opening skylight, also known as a roof window, can be hinged and manually or electrically opened to allow airflow and ventilation.
Opening roof windows are often installed on pitched roofs, particularly in:
Loft bedrooms
Attic bathrooms
Rooms needing natural airflow or fire escape access
Brands like Roto Roof Windows offer a range of top-hung or center-pivot opening options.
✅ Advantages:
Improves indoor air quality
Helps remove steam/moisture
Can be fitted with sensors or rain detectors
Should You Choose Fixed or Opening? Key Questions to Ask
Do I need ventilation in this room?
Yes? ➜ Opening skylight or adding a vented model
No? ➜ A fixed skylight may be better
Do I want a minimal, all-glass look?
Yes ➜ Frameless fixed rooflight
Do I have other ventilation options?
Cooker hoods, extractor fans, and trickle vents may make an opening skylight unnecessary.
What’s my budget?
Fixed models are generally more affordable and easier to install
Is it a flat or pitched roof?
Flat ➜ Frameless fixed skylight from [Skylights Brand Name] is ideal
Pitched ➜ Consider Roto Roof Windows or even frameless fixed roof windows for a clean aesthetic
Customer Testimonials
“We chose a fixed frameless rooflight from [Skylights Brand Name] in our new kitchen extension. We didn’t need it to open because we had a good extractor. The light is incredible, and it looks stunning.”
— Anna, homeowner in Bristol
“For our loft ensuite, we needed something that opens. The Roto top-hung roof window was perfect — it lets the steam out after showers and meets egress rules.”
— Paul & Ellie, Brighton
FAQs: Fixed vs Opening Rooflights
Yes. Frameless fixed roof windows (like those from Skylights.co.uk) can be installed on low-pitch or pitched roofs where ventilation isn’t needed.
Fixed skylights are typically more energy efficient, as they are completely sealed and have fewer thermal breaks.
Modern models from trusted manufacturers, such as Roto, feature excellent weather sealing. However, all opening units carry a slightly higher risk compared to fixed.
If the skylight or roof window doesn’t project more than 150mm from the roof surface and is not on a protected building, it may fall under permitted development. Always check with your local planning authority or visit PlanningPortal.gov.uk.
Planning & Building Regulation Tips
Part L (Thermal performance): Triple-glazed fixed rooflights from Skylights.co.uk exceed U-value requirements - Conservation of Fuel and Power
- Part F (Ventilation): If you use fixed units, ensure other ventilation methods are installed - Ventilation
Part B (Fire safety): For escape routes (lofts/bedrooms), opening models may be required - Fire Safety
Citations:
Installation Resources
Final Takeaways
✅ Choose a fixed skylight if you want a low-maintenance, frameless design and have other ventilation sources
✅ Choose an opening roof window if the room requires airflow or egress access
✅ Frameless fixed models from Regal Glass Group are top-rated for modern kitchens, bathrooms, and flat roof extensions
✅ Always consider UK Building Regs and consult your local planning officer if unsure
Still comparing options? Speak to an expert at Skylights.co.uk
