The Silent Roof System material weighs 800 grams per square metre. Over a 10 square metre conservatory roof this equates to 8Kg or just over 17lbs.
There is of course the uPVC framing that contains the material which over the same size conservatory roof would be a similar weight. So the overall additional weight that the Silent Roof System would impose is 16Kg or 35lbs over this entire roof area of 10 square metres. The average conservatory roof can easily support the weight of an adult standing on top of the glazing bars!