If you live in an older home remodeling it will prove to be a little more difficult than most other homes that may be newer. The materials used back in the 1970's were a little different than most materials today. Our building codes have changed over the years and energy efficiency was not top priority.
If your wanting to do some upgrades I would recommend starting with insulation and windows. The windows today are dual paned low-e which allow light to enter but reduces the amount of heat that enters into the home. There is also the debate on aluminum framed verses vinyl framed windows. I seem to always lean towards the aluminum framed because of price and I don't find that the aluminum frame produces that much heat transfer. However, if you live in a wood framed stucco home there is a retrofit vinyl product that will allow you to replace the windows without damaging the stucco. If you live in a block or wood siding home the you have the option of using a nail on window and trimming them out. This is a fairly inexpensive option that I have done many times. If your budget doesn't allow a full house replacement then choose the windows that get direct sunlight first and replace them as money allows.
The insulation in your attic is another great place to upgrade. You should have at least 8-9 inches of blown insulation in the attic to get an R30 rating. The insulation used in the 70's would settle over the years, anyone crawling through the attic would disturb the insulation creating open pockets for hot air intrusion or cool air escape. If your in need of a new roof it would be a good time to upgrade your attic ventilation. There are many options but most people like to use the whirlybird because they can see them moving which means they must be working, right? Not always the case, you would be surprised to know how much air they are really moving. The better the attic ventilation the longer your roof will last and less hot air to enter into your air conditioned home.
Since April of 2010 the laws have changed when it comes to working on any home built prior to 1978. More to come on that next week.
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