Montreal Roofers Ventilation Services
Montreal roofers Ventilation Information
Attic ventilation is an important part of roofing. Proper attic ventilation extends the life of a roof and reduces problems because it minimizes the temperature differential between the attic and the air outside. Proper ventilation will remove moisture and heat from the attic. Trapped heat and moisture can raise energy costs, cause ice dams, and damage roof system components as well as structural and personal items located inside the attic where temperatures can easily reach 150° F (65° C). Condensation that forms inside attics can be caused by the use of washing machines, dish washers, bath tubs, showers, and tumble driers unless these items are properly ventilated through the roof. In some cases the condensation can be bad enough to be mistaken for a roof leak.
Here are some problems associated with an improperly ventilated attic space. Sumps between rafters (deck deflection) can happen because after awhile (sometimes several years, sometimes only a couple years), a plywood roof deck can warp or deteriorate and become spongy and dangerous to walk on. This occurs because one side of plywood decking needs be able to "breathe" by being exposed to circulating air. The adhesives used in the plywood can deteriorate or Dry Rot can occur because of condensation. Water vapor will condense first on anything metal inside the attic; this will eventually cause the metal to rust. Heads can rust off nails, metal plumbing straps or straps holding HVAC ducting can rust in two causing the ducting to crash down on top of the ceiling joists or through a suspended ceiling. This problem is more common in humid climates.
In colder climates – generally where the average January temperature is 32° F (0° C) or colder – high inside humidity (40% or greater) combined with low outside temperatures can cause frost to form on the bottom of the roof deck. See Dry Rot in the glossary. Insulation can trap moisture which will reduce the R-value of the insulation and create a nice environment for the propagation of certain molds, spores, and fungi which will also cause problems. See Dry Rot in the glossary.
There is also the problem of mildew which is both damaging and can cause health problems. The roof system itself will deteriorate prematurely. Cooling units will need to be serviced or replaced prematurely because of excessive use. Ice Dams - ice dams are the result of melting snow continually refreezing at the roof perimeter and then backing up under the shingles and causing leaks. Proper ventilation used in conjunction with heavy insulation and an air barrier can create a Cold Roof Assembly which will help eliminate ice dams.
How Maximum Ventilators Work
The Maximum Ventilator is a static ventilator which is used to replace stale, moist air within the attic space with fresh outside air which is being drawn in by the ventilator through the soffit air intake located on the underside of the eaves of the building.
The ventilator functions with the combined effects of wind and pressure differentials, creating a chimney effect, thus drawing out the stale air from the attic space. Both the Turbine and the Maximum Ventilators function the same, except now the Maximum Ventilator does not have to turn to prevent rain or snow infiltrations due to it's unique, patented, storm proof deflector built within.
That's right, the only reason the turbine is turning is to prevent rain and snow infiltrations into the attic.
Refer to a chimney with a fireplace or wood stove. Do you see anything on top of the chimney that is turning to draw out the smoke? Of course not, this is being done the same way as the ventilator, wind and pressure. If you notice, as the velocity of the wind becomes stronger, the draw also becomes greater, thus forcing you to close the damper of the chimney flue so that you do not lose all your heat.
The velocity of the wind is what activates these ventilators, but when comparing the Maximum Ventilator with the turbine, there is another flaw with the turbine, the turning of the head of the turbine is also preventing the full effect of the wind, thus reducing the drawing power and capacity of ventilation area.
The Maximum Ventilator has no moving parts, and because of the design, it captures the full effect of the wind, producing a greater drawing power thus a larger capacity of area to ventilate. The Maximum Ventilator model #301 is capable of ventilating 1200 sq. ft. of attic area, compared to the 12 inch turbine ventilator, which is capable of only 400 sq. ft.
Features:
Very well protected against snow infiltrations due to patented storm-proof deflectors
No moving parts, needs no electricity, thus no more maintenance for the end user
Built in wire mesh screen preventing rodents from entering
Lifetime guarantee on all manufacturing defects
Five year warranty on paint and corrosion
Colours: Black, Brown, Grey.
Advantages:
Has a larger ventilation area capacity, eliminating the need for several holes in your roof
Activated by as little as 4 miles per hour wind, it continuously replaces the air in the attic space, thus reducing any possibility of heat and moisture accumulations
Can be installed on all types of roofs and membranes
Fast and easy set-up, allowing for a consumer-friendly installation
Due to the height, it can withstand several snowstorms without being covered
Can resist wind-speeds of over 55 miles per hour.
Complete line of models for all your ventilation needs.
