Two major factors to consider when it comes to this is the amount of natural daylight that is being let into the building and the temperature regulation of the space. In the past, it has always been a case of compromising on having one of these versus the other.
However, modern rooflights from leading manufacturers now allow you to have bright and airy living spaces, without having to worry about overheating in the summer or being too cold in the winter. This is achieved by ensuring that the U-value of these rooflights are as low as possible.
What U-values are and their importance
The overall U-value of a product relates to its thermal transmittance properties. This performance level is measured by the rate of transfer of heat through a structure, divided by the difference in temperature across that structure.
Units of measurement for a U-value are displayed as W/m²K. The better the insulation, the lower the U-value will be. Rooflights with a lower U-value will make it much easier for you to regulate the ambient temperature of your property.
What to look for in a new rooflight
When deciding on your new rooflights, it is important to consider the thermal performance that these units offer. Look for a manufacturer that can provide you with full U-value calculations.
It is also critical to look for a rooflight that has a fully thermally-broken frame design, as products that do not have this feature will have poor insulation due to the effects of cold-bridging.
What are the best glass options?
Leading rooflight providers will be able to advise you on the most effective glass options in order to meet the specific needs of your project.
Super Low-E coatings and Solar Control glass are available to improve the thermal efficiency of the glass, positively reducing the overall U-value of the skylight.
Perhaps the most advanced solution currently on the market comes in the form of a specialist film that actually sits within the glass unit itself.
These films allow double glazed rooflights to perform as well as triple glazed rooflights, without the increase in weight and costs that would be incurred by going down the triple glazed route.
The benefits of working with experts
Not only will an expert provider help you to specify the right skylights for your project, they will also be able to advise on the correct installation procedure for these rooflights.
A poor installation will undo all of the good work that you have done by selecting a thermally-efficient product.
If the rooflight is fitted incorrectly, then the thermal transmittance will be considerably higher than desired. Worse still, it could even be prone to leak if it has not been installed properly.
An expert rooflight manufacturer will work with you and your builder to ensure that these units are installed correctly, so that you are able to enjoy all the benefits that they provide.