Save money when Installing Roof Ventilation
Are you considering installing roof ventilation in your new home? There are many options and alternatives to choose from!
1. Wind Driven Roof Fans (Whirlybirds)
Whirlybirds on Roof
2. Mains Powered Roof Vents
3. Solar Roof Vents
4. Passive Roof Ventilation
- Wind driven whirlybirds are not expensive to purchase, but you’ll need a lot of them for real results!
- Mains powered roof vents require a power point in the roof space – and are more costly than Whirlybirds. They will also require a power point to be installed in the roof.
- Solar roof ventilators are priced similar to powered roof fans, but don’t require an electrician to install.
If you are looking at overall cost of installation to install adequate roof ventilation you must take the following 4 options into consideration:
- Purchase cost for required number of units
- Total installation cost for all units (value your own time)
- Ease of installation – impacts significantly on the cost of your project (if you are paying somebody to do it)
- Ease of installation is also very important for the durability of the roof penetration, which is essential to your peace of mind during wet weather
Generally – the whirlybirds are easy to install – and what is available locally is generally suitable for installation on Australian roofs.
Powered roof vents and solar roof ventilators come with a variety of flashings, most of them designed for American roofs (shingles, see below image), making them very difficult and time consuming to install on both tin and tile roofs in Australia. So if you are going for these options – make sure they are designed for our roof types!
Passive vents are based on the fact that air expands when it is heated up. The sun shines on the roof and heats up the air inside the roof space. The passive vents then allow warm air to escape. the problem with the passive vent approach is that it only works, when the temperature in the roof space is high – which means that it will not prevent the heat build up – it will only take the edge of it. The effect will therefore always be limited – even f you install a large number of passive vents for roof ventilation.
So when you purchase your next roof ventilator – make sure you get a product that moves sufficient air to ventilate your roof space effectively, whilst it is easy to install – so that it doesn’t take too long/cost too much and give you problems with leakage down the track!
If you’d like more info on the subject we’re always giving our free advice to send us a message in the ‘Contact Us’ tab!