Insulation in your internal access garage

[north shore]

Hi, I have an internal access garage as part of our one storey house, the internal wall backs on to two bedrooms. The ceiling space above the garage isn't insulated. The house was built in 1999.
When we redid our ceiling insulation the guy said don't bother doing above the garage.
But I wonder if it would make a difference to those two bedrooms, as one especially is always quite cold.
Why don't they insulate garages would anyone know? I can understand a separate garage, but this is part of the house.

[eri]

a normal built in garage

is already acting as "insulation" as it's a dead air space that protects the adjoining living area wall from excessive heat draw-down

what heat are you generating in the garage that you need to keep by insulating the garage ceiling?

[PC]

We retrofitted an insulated garage door to replace an old metal tilt door.
Cost~$2K - it was a small single door.
Big heat difference - no longer freezing cold in there - and a decent remote control.

http://garador.co.nz/

[Gladdynook]

its not a requirement under the building code, therefore people opt for the cheap option and don't insulate.

However I believe it would make a difference to the warmth of the house, and also keeps it cooler during the hot months. As suggested an insulated door is well worth the investment too.

And besides who wants to work in a hot or cold garage. Best part of the house IMO

[Aston]

If there is insulation in the wall between the garage and the house and also good insulation in the ceiling of the house, surely the difference in the warmth of the bedrooms would be insignificant. If the separating walls are not insulated, then rip the gib off the walls on the garage side and insulate them, it shouldn't be a big job.

[donnyboy]

as long as the the living spaces are insulated from the elements, i wouldnt worry about the garage. There would be some exceptions thou, and some points would be; to stop mold growth on the ceiling, if the garage is used as a living space, or if you are spending some time in there.

I would make sure the 2 bedrooms walls backing onto the garage is well insulated thou to complete the thermal envelope.

[north shore]

Thanks for the replies everyone, it is used as a garage not a living space.

[PTILoveYou]

I would spend the money on additional heat pumps.

I live in a 2014 built house, and it is still cold...

[drelly]

In case anyone is interested, I have a client who is offering Waikato customers 35% off insulation and installation as well as 12 months interest free: http://naturalinsulation.co.nz/hamilton-waikato-region/

[Wayne]

Why don't they insulate garages would anyone know? I can understand a separate garage, but this is part of the house.

Cars don't complain much about the cold!
The wall between the house and garage should be insulated - must be insulated according to the regs.

[Wayne]

as long as the the living spaces are insulated from the elements, i wouldnt worry about the garage. There would be some exceptions thou, and some points would be; to stop mold growth on the ceiling, if the garage is used as a living space, or if you are spending some time in there.

Mould shouldn't be a problem as there is usually good air movements and no cooking/showing to produce moisture.
Moisture from washing drying (we have a clothesline in the garage) and wet cars isn't really a problem as you don't get warm moist air

[donnyboy]

Ive seen mold growth in garages many a time. Esp with the dryer in the garage. Why is it recommended that dryers are vented. It is warm moist air that comes out from a dryer and it condenses on the glass windows and ceilings
I guess youre lucky enough to have good airflow through yr garage.

[Maccachic]

My accountant has just lined her garage door with a retrofit kit - she reckons its made a huge difference to the temperature.

[Wayne]

My accountant has just lined her garage door with a retrofit kit - she reckons its made a huge difference to the temperature.

Made a difference to the temperature in the garage or the house?

[Wayne]

Ive seen mold growth in garages many a time. Esp with the dryer in the garage. Why is it recommended that dryers are vented. It is warm moist air that comes out from a dryer and it condenses on the glass windows and ceilings
I guess youre lucky enough to have good airflow through yr garage.

We don't have the dryer in the garage - it is in the house (laundry) and vented.
With an insulated garage you would still get condensation on the windows.