Hi, is there a maximum weight limit for the windows these can be used on? we would be looking to order a few for a project in Gravesend.

Whilst there is no weight rating on these, we have seen them used on rooflights weighing up to around 50 kg without any issues being reported. They’re made from solid brass, so their strength is quite robust.

In most cases, I would expect the fixings to be the limiting factor long before the screw jack itself would be at risk of failure.