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You'd like to imagine that, in a climate with very cold winters, the building code would require high efficiency windows.

It's completely mind boggling that anyone was allowed to build housing with single pane windows in 2003.

At that sort of heating requirement, wouldn’t it save you money to replace the window yourself? Presumably you’d need to get permission from the landlord though.

Have you tried putting the plastic film on the inside of the window frame to create a dead air space? I've always wondered how well that works...

It works really well. Get the stuff you use a hairdryer to shrink so it tightens like a drum and has no creases.

You can also put it on the outside to give yourself 'triple glazing'. It makes a really big difference to the heating required to stay warm.

Looks a bit tacky though.

Doesn't it lock in moisture and promote mold?