Anything over a 6 12 pitch tends to make massive amounts of snow slide off the roof without warning.
Gutters for 12 12 slope in snow country.
Box gutters are valley like troughs at the edges of roofs which are concealed in appearance and don t draw attention from the beauty of the house.
At these slopes snow creeps rather than slides and is easy to manage.
Roof slopes lower than 4 12 tend to perform well with metal roofs which are less prone to leakage and ice dam formation.
Another way gutters are damaged from snow and ice is from bearing the excessive weight of a big snow fall.
In real life constant subfreezing temperatures tend to hinder that process.
If gutters slope too severely they don t hold water and water could splash over the sides in heavy rain.
One very interesting product for snow country is called gutter helmet.
Built in gutters also called box or hidden gutters are actually a type of rain gutter and can replace the latter especially when the conspicuous appearance of the rain gutter is the main issue.
It is a specially shaped sheet metal cover for the rain gutters that draws the water around and into the gutter but throws leaves snow and even ice off the edge over the gutter.
The amount of collected water increases until it spills over the sides of the gutter.
Clogged gutters will only accelerate the process of ice damming and over flow when the gutters fill up with ice and snow.
A minimum slope of 1 inch per foot is recommended in snow country.
Leaf guard uses the same concept but is built right into the rain gutter.
If gutters don t slope water gathers in them.
Snow cold and ice can wreak havoc on gutters.
Massive snow suddenly sliding off a roof sometimes kills the unsuspecting caught below it.
Ideally snow and ice would thaw and run into your gutters.
On roof slopes between 4 12 and 6 12 rough textured roofing materials work best.
As a result ice and snowpack can build up inside the gutters which produce additional weight on the gutter sections and the fasteners that hold them.
If these issues are addressed during the design stage and the roofing contractor does his job these systems will almost always perform as intended.
The key factors are usually snow loading requirements adequate slope and the use of snow guards when needed.
To keep the snow on your roof from melting make sure your roof is well insulated and that warm air is not escaping.