How do I know what size skylight I need?
It can be confusing when purchasing a new rooflight or skylight, so take a few minutes to read this very easy guide on how to buy the correct rooflight today.
So, lets say for example you're after a new dome skylight, where do you start?
Firstly, on each product page we list a few measurements.
Dome Size - Although we specify the size of the dome, this is actually not needed and can often confuse people. The dome size is the size of the dome!
Roof Opeing Size - This is the measurement that is most important. The roof opening size is the physical dimensions of the hole that is currently in the roof, or if its new build, the size of the opening you will need to create.
External Builders Curb Size - A builders curb is another term for a timber upstand. Typically a builders curb is created using 2" timber. So, if you're going to create you own curb or you already have an existing curb then the external size of this is needed.
Its really that simple!
If you are looking to purchase one of our Rooflights with an Insulated PVC Upstand we advise on specifying the Roof Opening or Finished Internal Aperture Size. This is Dimension C on the below drawing.
If you plan to create your own timber upstand, we advise creating this at 50mm (2") Wide and 150mm (6") High. If you create your own timber upstand or whether there is currently an upstand in place on the roof, we advise on specifying the External Upstand/Curb Dimension. It is also worth noting the Internal Aperture as well.
NOTE THAT DIMENSION C WILL BE SMALLER WHEN CREATING YOUR OWN UPSTAND!
As always, if you get stuck - Call us today!