Your argument has been taking a few body blows in the last few days DutchRoll. Even the IPCC is trying to wrangle out of the global warming argument. The golden parachutes within the IPCC are being prepared.
The only significant thing that has changed in your house, after an extensive inspection by building inspectors, is the extra layer of pink batts.
You are making the same mistake that the pro-warmers have made for the last 30 years. You ASSUME that the world's climate is as simple as the environment inside the home. If it's not granny, then it's the heater. If it's not the heater, then it's the batts.
You ASSUME the pro-warmers know every feedback, every sink, every source of CO2, every energy interaction, every oceanic influence, every temperature change and are modelling each and every one of these influences simply and completely on a computer. Seems like the IPCC has found a little humility in the past week. It has to if it wants the budget funding to continue. It's changing its tune to one of moral conscience. How sweet! Doesn't help the millions of Australians impacted by a carbon tax though.