Why Roof Ventilation is Essential
Five Reasons Roof Vents Make your House Last Longer
Preparing Your Home
Why are roof vents essential to a house? Let’s look at the facts that make for a healthy roof, and the vital role that roof ventilation plays. The kind of adverse weather conditions that Australia experiences find most people imagining that they are prepared, when in reality they are underprepared at best, and woefully unprepared at worst Unfortunately, it seems that may homeowner see the value or preparedness after the fact and the costs can be horrendous, especially when it comes to the integrity of your roof.
Seeing the Value
Many homeowners, especially new owners who have not experienced the adverse effects of an unventilated house and therefore may be skeptical about the benefits Roof ventilation or Whirlybirds or Whirligigs as a lot of Australians call them.
The most basic thing to know about ventilation is what it is. Roof ventilation is the stream of air through an installed system that can either be an intake vent or an exhaust vent. That’s simply how it works, not what it really does.
How Does Ventilation Work?
As long as there is air flowing then ventilation is possible.
There has to be an intake vent and an outlet exhaust vent for the ventilation process to work.
Roof ventilation began when in the mid-20th-century experts discovered that part of the causes of structural damage to houses and roofs is lack of ventilation.
Creating a directed air flow in tour house to generate cooling or warming requires two primary methods.
Airflow within the attic and ceiling space is the best way to provide cooling for the home and the roof. It is also the primary method of dealing with moisture problems in your house.
The two methods:
1. Mechanical To mechanically create air flow in the attic means that you need a power source to generate the energy for the process.
2. Natural air flow This entails the stack and wind effect. Natural attic air flow creation is used in most cases. When the stack and wind effects come together, air circulation happens.
What is the Stack Effect?
When hot air rises and exerts pressure at the peak of the attic, this is called the stack effect. The warm atmosphere that permeates out is exhaust. The hot air in the attic cannot escape unless there is colder air coming in. A vacuum needs to be created for airflow and movement. The fresh air (cooler air) has low pressure and settles at the bottom of the attic, is the intake. Wind blowing against the roof causes the wind effect. This is where the wind blowing increases the exhaust and intake rates. The wind effects create excellent ventilation for the roof.
Roof ventilation is a unique process for every individual house. Many factors influence the choice of ventilation and positioning.
These include the type of roofing, house design, climatic region, and costs.
In Sydney, there are building regulations and codes that govern the kind of ventilation and roofing you can install in homes.
These regulations also play a significant role in determining the choice of roof vent and how many you need to install to facilitate effective ventilation.
It doesn’t make sense to under ventilate once you have made the decision to add Whirlybirds to your roof. Do You go Wind-Driven or Power-Driven?
Types of Roof Vents
There are two main types of ventilation systems that offer ventilation solutions during hot summer months.
Roof Exhaust Vents
Roof air vents allow the air in the attic to exit into the atmosphere. Using exhaust fans with intake vents works best and more efficiently than when alone. Roof exhaust vents should be installed on the highest point of the roof.
There are several types of Exhaust vents that facilitate the escape of air from the vents and the attic. The most common type is the ridge vents. Ridge vents work best with soffit vents that are intake. Installation of the ridge vents should be on the roof ridge, horizontally from end to end to create an elegant decorative feel.
Ridge vents are designed in various colors. Once installed in the same color as your roof, they blend in and could seem as pass as part of the roof. Other types of exhaust vents include:
a. Wind turbines
These are also known as the whirlybird or whirligigs Wind turbines rely on the wind to rotate their turbines and facilitate the extraction of air from the attic and roof surface. The whirlybird vent installation is quick and straightforward. Installation should be done near the roof ridge.
b. Power Attic Ventilators
PAVs utilize solar or electric power to run their motors. After installation, they need to connect to power sources. These ventilators are very quiet, practical but also very expensive. Especially those electrically powered.
c. Roof Louvers and Gable Louvers
These use static systems. They do not require to be electric or wind-powered. Their turbines naturally turn from the moment of installation.
Roof exhaust vents are all different and unique, but they have several things in common. The first thing is their usage. Their primary purpose is to allow passage of hot air and humidity from the attic into the atmosphere.
The second similarity of all exhaust vents is that they are all placed outside the house, on the roof surface.
Mostly near the roof ridge for better functioning. Depending on the size of your budget or the climatic conditions you are against, you can choose the most suited roof air vents for your house.
• Intake Vents
Intake vents are not very easy to spot because they are not installed on the roof. They are mainly located at the edge of roofs, under the shingles or at the drip edge. Most intake vents are made of copolymer material.
The primary purpose of intake vents is to allow cold, low-pressure air to enter the attic and force the hot air to leave through the exhaust vents. This continuous process is what provides the cooling effect on the roof and the attic.
Five Significant Benefits of Roof Vents
There are many reasons why you should ventilate your roof. There are many benefits as well to ventilating with the right roof vents.
The main advantages are:
1. Gives your house a cooling effect
Summer months are brutal in Sydney; there is so much heat that not even the indoors provide a haven.
Poor ventilation in your house can be the cause of such extremities. To ensure that there is a balance in your home, install a quality roof vent.
When the roof vent is operational, it sucks away hot air from the living space. To occupy the space created, colder air comes in.
Since the vent is continuously working, you get to experience constant cool breezes from the comfort of your home.
2. Prolongs roof life
The life of your roof can be affected by many things. Weather conditions are at the top of the list of things that damage the roof.
Having a great ventilation system in place can prolong the life of your roof. Your roof ventilation system ensures that there is no heated air accumulating on the roof space. All the heated air is blown away, and a vacuum is created.
Some ventilation systems help your roof age at a consistent pace by maintaining a temperature balance throughout the roof.
When a stable temperature is kept on your roof, there is no risk of ice damming that could result in roof leaks.
With good roof ventilation work, you can avoid these issues because the warm air in the attic will be released into the atmosphere immediately it is formed.
If allowed to accumulate, it melts the ice, setting off a chain to the destruction of your roof, attic and even walls.
3. Cuts down on energy costs
Air conditioning is the most energy consuming activities in any Australian home.
Having the right roof ventilation solution gives you security and saves you money.
Whirlybird vents that are wind-driven may not cool your house as efficiently as PAVs, but they have no running costs.
Solar Powered Whirlybirds
Solar powered roof vents are very economical as well. They are robust and provide significant cooling for the interior. They only require solar energy to operate which is naturally sourced. With the right solar roof vent, you can save so much money.
PAVs also help you save money, regardless of their running costs, they help reduce the air conditioning costs for your home while at the same time providing exceptional ventilation for your roof.
4. Protects your house from mold formation
Many modern homes are today faced with the issue of condensation. There are so many appliances installed in contemporary dwellings that produce vapor which then condenses on the walls, ceiling, windows and many other parts of the house.
Condensation is a primary concern because it threatens the structural integrity of your whole house. Since many of these appliances are necessary, the best way to curb condensation is installing an efficient roof ventilation system.
PAVs have detectors on them. There are a thermostat and humidistat in some powered roof ventilation. The sensors allow the device to know when the humidity levels in the house or heat have risen, and thus it automatically turns on. Dampness in the home results in mold formation which then releases pollen to the interior leading to poor quality breathing air in the house.
The solar-powered roof will help extract the moisture from your home through the stack matter and wind system. Whirlybirds are also instrumental in ensuring that your house remains dry and fresh. Any musty smells are cleaned out with the constant flow of cold air.
5. Preserves the insulation on your roof
Many Australian homes have padding on their roofs to prevent the escape of warm air from the house during winter and also to keep in fresh air during summer. These insulators can be damaged if the heat and humidity levels on the roof are not regulated. Overheating on the roof causes aging and degradation which also affects the insulation.
Installation of a roof vent on the roof ensures that the heat levels on the roof remain manageable throughout the day and night. Roof insulations and the ceiling should not be exposed to extraordinarily cold or warm temperatures. A good balance from the right ventilation helps prolong and preserve the life of the insulator in your home.
Roof vent prices in Australia
Prices of roof vents in Sydney range from the very cheap models to expensive vents. This is all dependent on the size of your budget. Before heading out to purchase a ventilation system, work out the math and find out as much information about the product as possible.
Once you have a budget that states your limits on the expensive and cheap scale, then you can select from the various roof ventilation options available. Roof vent prices differ from vent types, primarily because of power.
When planning your budget, it is essential to factor in the energy bills, maintenance costs and any other charges you may incur from purchasing the ventilation system. These prices help you figure out if you can afford to maintain the choice of ventilation.
Wind-Powered Roof Vents
These are the most affordable on the price scale. They range from 50 dollars. The wind-driven roof vent will not require any other charge after purchasing. After the installation, your ventilation system is ready to operate for decades.
Solar Powered Roof Vents
Slightly more expensive than wind vents but are also relatively affordable. The roof vent price for solar-powered roofs is from $400 for a quality solar roof vent. There are no running costs when it comes to using the solar powered roof since the source of energy is natural. You could check on the ventilation system to determine if it needs maintenance.
Powered Roof Vents
They are the most expensive when it comes to roof ventilation solutions. Their purchase cost ranges from $700 for quality vents. After purchasing, factor in the energy costs that accompany this device. Maintenance on the power attic ventilators is essential because they do not make any noise. If they happened to malfunction or stop, you would not know unless you regularly check.
A roof ventilation system should not be regarded as a burden or unnecessary. Without the right vents in place, you will incur costs of replacing and repairing your roof now and then. These repairs are not very healthy for the structure of your house.