Some customers have reported that when testing after a new installation that water misses the guttering!

In almost all cases it’s because a bucket of water, hosepipe or watering can is not a realistic representation of rainfall which drips both in an irregular manner and in varying sizes, with a much larger spread.

Rainfall therefore tends to dribble down the front fascia and drop into the gutter from the lower edge of the roof, whereas pouring water from a hosepipe, watering can (without a really fine rose) etc on a roof to test guttering will tend to sheet and ‘tear’ (or curve) off the edge and miss due the increased unrealistic flow rate.

Particularly on a new roof the materials are also slightly hydrophobic – seen as water droplets remaining globular in nature. Over time, microbial growth, dirt etc on the edge of the roof also contributes to the water flowing around and off the bottom edge as the surface area increases and the materials become slightly more hydrophilic (water loving).

We just ask customers to give it a few weeks at least and watch the behaviour with real rainfall; we’ll gladly help out if there are further issues but on such advice – after seeing real world conditions – not a single customer has reported failure of the product to perform!