Ice and water protector sometimes also referred to as ice and water shield is a waterproof roof underlayment membrane developed to protect vulnerable areas on a roof from ice and water damage.
Frost on roof means.
Gulf coast of mississippi.
2 the car roof cools radiatively.
In other words the sequence might be as follows.
Warm attics also show the outline of the rafters underneath the roof deck as the escaping heat going as heat does to where heat isn t melts the frost.
26f degrees nov 19 2014 6 45 am.
Is the absence of frost an indication of heat loss thru the roof via poor insulation.
Icicles don t always mean ice dams.
A lack of frost can indicate that heat is leaking out through your attic space onto the roof and melting the frost.
What can you do about it.
On my roof some areas will have frost and others not.
The heat is thawing the rafters too but the have more mass to absorb the heat and keep the deck above them frosty.
Frost is caused by moisture that escapes up through attic bypasses then condensing on the roof boards and rafters.
If the morning sun directly hits your home and not your neighbors lack of frost may just be attributed to the sun s heat.
This simple answer is that the attics with no frost are warmer.
They are warmer because the attic is either poorly ventilated or poorly insulated or a combination of both.
Closer building in foreground is unheated thus no odd pattern.
Is this a problem.
Over the living space the roof has little smatterings of frost but is largely devoid of the frozen stuff.
Plus heat wants to go up.
1 initially the air and the car are at temperature 37 f and the dew point is 35.
What does it mean.
Because they were running the heat to keep the house warm.
Something i implied above but didn t say explicitly is that when frost forms on the roof the roof is below freezing.
Frost on roof it s that time of year when we occasionally have frost on our roof tops.
Small icicles along the edge of your roof.
However if nothing is different about your home compared to your neighbors you may have a problem.
Ice and water protectors sometimes called ice and snow shields in cold climates are made with polymer modified bitumen.