I want to add some roof vents to lower the attic temperatures. SCG advertises these passive ventilation tiles.

Has anybody seen them before?

Better to add some wind turbine warehouse vents.

Depended on noise sensitive you are. I guess the decent quality ones is not that noisy. Even got solar powered ones

28 minutes ago, Hummin said:

Better to add some wind turbine warehouse vents.

I wanted something a little less visible.

1 minute ago, stubuzz said:

I wanted something a little less visible.

It's on the roof ;-)

You get them in quite stylish designs and smaller, and they are effective. I will add a few when I now makes another ceiling in my indoor garden.

The smallest one i saw is 24".

I've seen the SCG roof vent products at the SCG store and thought they looked good.

The will also come to the home, do a survey, tell you what you need and do the install.

Cut an opening on either side and place a fan in one of the openings blowing outward.

Put a sprinkler on the roof.

On 4/2/2026 at 6:21 PM, stubuzz said:

I want to add some roof vents to lower the attic temperatures. SCG advertises these passive ventilation tiles.

Has anybody seen them before?

Not seen them before.

Ceiling ventilation is very desireable of course, however i wonder how much hot air these tiles will allow to escape / push out.

Much bigger escape volume would be better and I'm surprised SCG doesn't have something similar but with much bigger hot air outflow.

2 minutes ago, scorecard said:

Not seen them before.

Ceiling ventilation is very desireable of course, however i wonder how much hot air these tiles will allow to escape / push out.

Much bigger escape volume would be better and I'm surprised SCG doesn't have something similar but with much bigger hot air outflow.

SCG has all manner of roof/ceiling ventilation.

You need 10-15 air-turns an hour.

Start by calculating the volume of your attic space and go from there.

19 hours ago, scorecard said:

Ceiling ventilation is very desireable of course, however i wonder how much hot air these tiles will allow to escape / push out.

They recommend 2 for every 50m2 of roof space.

There is a different kind of tile. It is almost 5,000bht a piece.

20 minutes ago, stubuzz said:

They recommend 2 for every 50m2 of roof space.

There is a different kind of tile. It is almost 5,000bht a piece.

You mean m3, yes?

31 minutes ago, Yellowtail said:

You mean m3, yes?

No. Measurments are given for a flat roof.

I have a pitched roof, with a width of 32ft x 40ft long = 1280 sq ft, I estimate the height from the ceiling is 9ft, with an angle of say 40 degrees, anyone have any idea on how to calculate the sq footage of the roof space?

On 4/2/2026 at 2:21 PM, stubuzz said:

I want to add some roof vents to lower the attic temperatures. SCG advertises these passive ventilation tiles.

Has anybody seen them before?

The specs for this type:

• Technical specifications:

  • We recommend using 1 set per 10 square meters of roof area.

  • The recommended roof slope is 25-40 degrees.

16 hours ago, Jeff the Chef said:

I have a pitched roof, with a width of 32ft x 40ft long = 1280 sq ft, I estimate the height from the ceiling is 9ft, with an angle of say 40 degrees, anyone have any idea on how to calculate the sq footage of the roof space?

Do you mean the cubic feet, yes?

32ft x 40ft x 9ft/2 = 5,760ft^3

1 hour ago, Yellowtail said:

Do you mean the cubic feet, yes?

32ft x 40ft x 9ft/2 = 5,760ft^3

Yes, I actually want cubic metres, so your 5760ft^3 = 163.105 cubic metres, does that compute right to you?

Insulation is better and silent.

7 minutes ago, Jeff the Chef said:

Yes, I actually want cubic metres, so your 5760ft^3 = 163.105 cubic metres, does that compute right to you?

Looks right.

1 minute ago, FlorC said:

Insulation is better and silent.

Heat rises

16 minutes ago, FlorC said:

Insulation is better and silent.

Insulation holds the heat for longer, so good ventilation and air circulation make more sense if you do not run aircondition 24/7, still you need circulation for your roof to make it more efficient.

Painting the roof white, adding radiant protection, having air vents at both ends, and a few roof vents as well, would do wonders.

11 minutes ago, Yellowtail said:

Looks right.

So now knowing the measurements/cubic sizes, do I go insulation or airflow?

Why there wasn't any thinking about this when it was built 10 years ago is beyond me.

Current temps in lounge with A/C 27degs, outside in shade = 37degs, above ceiling in roof space 53degs.

Any suggestions will be very much appreciated.

18 minutes ago, Jeff the Chef said:

So now knowing the measurements/cubic sizes, do I go insulation or airflow?

Why there wasn't any thinking about this when it was built 10 years ago is beyond me.

Current temps in lounge with A/C 27degs, outside in shade = 37degs, above ceiling in roof space 53degs.

Any suggestions will be very much appreciated.

Venting the attic space is generally the best option when cooling. Roof turbines and vents on the gable-ends and or soffits work great.

Also make sure your thresholds are sealed. You'll lose a lot more cold air though a 1" gap under the door than you will through the ceiling.

When heating, you want to attic sealed.

You only get down to 27C with the AC wide open?

1 hour ago, Yellowtail said:

Venting the attic space is generally the best option when cooling. Roof turbines and vents on the gable-ends and or soffits work great.

Also make sure your thresholds are sealed. You'll lose a lot more cold air though a 1" gap under the door than you will through the ceiling.

When heating, you want to attic sealed.

You only get down to 27C with the AC wide open?

There is a 1m soffit around the whole building with airgaps and mesh.

All windows and doors have been refitted and sealed to prevent insects etc, getting in.

All the ceilings are sealed at the edges.

I have the A/C set at 27/26c during the day as I find that comfortable, we like 25/24c in the bedroom at night.

I think the biggest problem is we have a lounge/kitchen diner, which is my daytime halt, and 3 bedrooms, and a bathroom off, so the bedrooms heat up during the day and that slowly heats up the lounge area, my thinking is the heat accumulates in the roof space as the sun is on it all day.

3 hours ago, Jeff the Chef said:

There is a 1m soffit around the whole building with airgaps and mesh.

All windows and doors have been refitted and sealed to prevent insects etc, getting in.

All the ceilings are sealed at the edges.

I have the A/C set at 27/26c during the day as I find that comfortable, we like 25/24c in the bedroom at night.

I think the biggest problem is we have a lounge/kitchen diner, which is my daytime halt, and 3 bedrooms, and a bathroom off, so the bedrooms heat up during the day and that slowly heats up the lounge area, my thinking is the heat accumulates in the roof space as the sun is on it all day.

I'd go with roof turbines, high on the roof.

You need to extract at least 960cfm/1,632m3/h

1 hour ago, Yellowtail said:

I'd go with roof turbines, high on the roof.

You need to extract at least 960cfm/1,632m3/h

Thanks, I'll check them out.