Extreme Amount of Moisture in my Attic | Attic Ventilation

Condensation dripping from an H clip in poorly ventilated attic

I have an extreme amount of moisture in my attic, I recently had my roof re-shingled and had the roofer add 2 more vents for better ventilation. There is a build up of frost in certain areas of my roof, it has been an extremely cold winter, would lack of insulation cause this and how deep should the insulation be?

How Much Attic Insulation You Need | Insulation Zone Map

Have you ever wondered how much attic insulation is enough?
Lack of the floor attic insulation (house top floor ceiling), or inadequate amount of the insulation are definitely some of the most important reasons responsible for migration of conditioned (hot or warm) air into the attic.

During the cold season, missing attic floor insulation or low levels of attic insulation might be devastating, result in excessive condensation, attic mold growth, ice dams, and deterioration of the roof decking surface.
With sufficient attic ventilation, conditioned air that has penetrated ceiling surface into the attic would be discharged from the attic into the house exterior, […]

Attic Ventilation, Vent Chutes, Roof Soffit Vents

House attic ventilation & vent chutes

Vent chutes that are also called baffles or rafter vents play an important role in your attic ventilation system.
House attic vent chutes and their three important roles in attic ventilation:

vent chutes provide unobstructed air passage between the soffit vents and the attic
vent chutes allow installation of attic floor insulation close to the soffit, without worrying about clogging the soffit attic ventilation ports with insulation
vent chutes allow for sufficient accumulation of insulation right above where your house ceiling meets the exterior wall, thus limiting air exchange between the living space and the attic 

However, your attic ventilation / air […]

Ice Dams and Icicles, Preventing Roof Edge Ice Damming

Roof ice dams formation on your roof

Roof ice dams formation along the edges of your home roof and icicles hanging from the gutters and / or soffits should never be ignored. Their beauty on the exterior has roots penetrating your house attic and wall structures, often causing significant damage.
There are three main things responsible for roof ice dams:

Inadequate / improper house attic insulation
Inadequate house attic ventilation
Heat sources in attic area

Any areas between the attic and living space that are missing or have a low amount of insulation permit unwanted heat to transfer from the house into the unheated attic.
Warmer air […]