However in one spot it slides off the main roof and down onto the porch roof then it stays there and does not slide off.
Snow won t slide off metal roof.
It would be interesting to try it on a small part of the roof to see if it works.
Unlike shingle roofs metal roofs have smooth surfaces that do not provide any resistance to keep snow from sliding off.
I ve read about people using dupont snow and ice repellent or fluid film on snow blowers.
The best shoes boots for metal roofs are the soft soled shoes usually made of a light pliable rubber.
I would try cleaning the roof first as this would remove a lot of the dirt and debris that is making it hard for the snow to slide.
A method of retaining snow and ice on a metal roof so it will melt in place rather than shooting off the roof in a dangerous avalanche.
The primary reason is a fear of having the building collapse under a heavy snow load.
On metal roofs it s a must to wear rubber soled shoes.
What typically happens with a metal roof after a snowfall is that when the sun comes out radiant heat from the sun passes through the snow on the roof and reflects back outward.
Since it takes a few warm days to soften up the snow so it will slide off the snow is quite mushy and sticky when it lands on the porch and when it lands on the porch roof it packs instantly.
Our approach in north america is to use a metal roof with a steep slope that will allow the snow and ice to slide off.
Whatever the name these snow guards are of the highest quality and made by the amish community in the usa.
Why do we design this way.
You will have to adjust all of this according to how regular rainfall flows off the roof you don t want the water to overshoot the rain gutter.
Also metal roof systems absorb heat from the sun warming the surface in a way that lubricates the layer of snow and causes it to slide off easier and faster.
Position the rain gutter right the rain gutter should be installed a bit lower down so it is not directly in the path of the sliding snow and the metal roof should hang almost halfway over the gutter.
You should have the feeling that your shoes are sticking to the metal.
Snow will slide off the main roof after we get a few above freezing days.
Keeps snow from sliding like an avalanche off your metal roof.
Published on jan 19 2012.
As i design roofs today in ski resort areas i use one of the above types of roofs and plan to keep the snow on.
