Natural light plays a powerful role in transforming the atmosphere of any living space. Whether you're planning a new kitchen extension, converting a loft, or renovating a hallway, installing a flat rooflight is one of the most effective ways to brighten your home. And with the growing convenience of online shopping, many homeowners now choose to buy flat rooflights directly through eCommerce platforms.
But before you click “Add to Cart,” it’s important to understand what to look for, how to measure correctly, and how to ensure smooth delivery and installation—especially for something as structural and performance-driven as a rooflight.
Here’s what every homeowner needs to know when shopping for online flat rooflights.
1. Start with the Basics: Fixed vs. Opening Rooflights
The first decision you’ll face is whether you want a fixed or opening flat rooflight.
- Fixed flat rooflights are sealed, non-opening units designed purely for letting in light. They are ideal for living areas, hallways, and spaces where ventilation isn’t necessary. They tend to be more energy-efficient and less expensive.
- Opening rooflights (manual or electric) allow ventilation and are useful for kitchens, bathrooms, or anywhere that benefits from airflow.
For most homeowners, fixed models suit the majority of applications, but knowing the distinction up front helps narrow your search and prevents ordering the wrong type.
2. Understand Key Product Specs Before You Buy
When browsing online rooflight shops, you’ll see lots of technical terms. To make a smart purchase, focus on the following specifications:
Glazing Type
- Double Glazing: Most common; provides solid thermal insulation and sound reduction.
- Triple Glazing: Offers enhanced thermal performance—ideal for energy-conscious homes.
- Low-E Coating: Helps reflect heat back into the home, reducing heat loss in winter.
- Solar Control Glass: Reduces glare and solar gain in rooms with strong sun exposure.
- Obscure/Frosted Glass: Ideal for bathrooms or privacy-sensitive areas.
U-Value
This tells you how well the rooflight insulates. The lower the U-value, the better.
- Aim for 1.2 W/m²K or lower for double-glazed units.
- Triple glazing may reach 0.8 W/m²K or better.
Frame Type
- Aluminium (thermally broken): Strong, modern, energy-efficient. Ideal for contemporary homes.
- Frameless internal design: Provides a minimalist appearance from inside.
- PVC or timber frames: Less common for flat roof applications but can be cost-effective or match traditional décor.
3. How to Measure Your Roof Opening Correctly
Before you buy flat rooflights, you need to know the correct size. This ensures your new unit will fit securely and meet building regulations.
Important Measurement Tips:
- Always measure the structural opening (width and length) in your roof deck—not just the desired glass size.
- Some rooflights are sold based on overall unit size, while others are listed by visible glass area or internal clear opening. Always check the product listing carefully.
- Allow room for the upstand or kerb (a raised frame that supports the rooflight). If your roof doesn’t have one yet, choose a rooflight that comes with a built-in upstand.
If in doubt, most online retailers provide downloadable technical drawings or phone/email support to help you measure accurately.
4. Comparing Products Online: What to Look For
While browsing online flat rooflights, compare products across several dimensions—not just price:
- Certifications: Look for CE marking (or UKCA in the UK), compliance with Building Regulations, and BS EN standards for glass and construction.
- Thermal performance: U-values should be clearly stated.
- Glass specification: Does it include toughened, laminated, or self-cleaning glass?
- Installation guides: A good supplier offers downloadable installation PDFs or video support.
- Warranty: Reputable brands offer guarantees ranging from 5 to 20 years depending on glass, seals, and frame materials.
Make sure product descriptions are detailed and backed by technical data. If anything is unclear, reach out to the supplier before purchasing.
5. Plan for Delivery: Fragile Product, Big Logistics
Flat rooflights are large, heavy, and fragile. So it’s crucial to understand how delivery works and what to expect after you order.
Key Considerations:
- Lead Time: Check whether the product is made to order or in stock. Custom sizes may take 2–4 weeks or more.
- Delivery Method: Rooflights are usually delivered on pallets or in protective crates via specialist couriers. Check whether curbside delivery or offloading help is included.
- Receiving the Delivery: Be sure someone is present to inspect for damage upon arrival. Always check the glass and frame before signing.
- Storage: If you won’t be installing immediately, store the unit in a safe, dry location off the ground to prevent moisture damage.
If you’re hiring a builder, coordinate delivery to arrive shortly before installation to avoid double handling.
6. DIY vs. Professional Installation
Many homeowners are curious about whether they can install flat rooflights themselves. While fixed models are generally easier to install than opening ones, it’s still a job that involves:
- Waterproofing and flashing
- Working at height
- Structural carpentry (for the upstand or kerb)
- Safe glazing handling
If you’re experienced in home improvement, a small fixed rooflight may be DIY-friendly. But for larger units, opening models, or if your roof structure is complex, hiring a professional builder or roofer is highly recommended.
Before installation begins, download the full installation manual, double-check the measurements, and ensure you have the right tools and materials on hand (sealants, fixings, safety equipment, etc.).
7. Why Buying Online Can Be a Smart Move
Purchasing flat rooflights online offers several advantages:
- Broader selection: Access to a wide range of sizes, finishes, and glazing types.
- Better pricing: Online retailers often offer lower prices than local merchants due to lower overheads.
- Convenience: Order from home, with delivery directly to site.
- Custom options: Many online suppliers allow you to configure bespoke rooflights with specific glass, frame, or size options.
Just be sure to choose a trusted supplier with a clear returns policy, strong product support, and customer reviews that inspire confidence.
Final Thoughts
Buying a rooflight online might seem like a leap of faith, but with the right guidance and a little research, it’s a smooth and rewarding process. By understanding product specs, measuring correctly, comparing certified suppliers, and planning for safe delivery and installation, you can confidently buy flat rooflights that elevate your home in both function and style.
The right online flat rooflight will not only flood your space with natural light but also improve thermal performance, enhance design, and boost property value. And thanks to the growth of reputable online suppliers, getting the perfect fit has never been easier.
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