Check the insulation level in your attic as part of your overhaul of home efficiency. Many companies can come out and do a free assessment for you with a quote on what you will need to increase efficiency to it’s top performance. With proper insulation you can reduce your heating and cooling bills by up to 30%, and after a Texas summer you know what that is worth!
If you have less than 7 inches of standard fiberglass insulation in your attic, you may want to seriously consider adding another layer. The higher insulation value, the better the protection you will have against cold and heat gains. The same goes for blown insulation, check the levels of depth as over time, the some types of blown insulation will gradually settle and become somewhat compacted. Generally, however, the depth is about 12-15 inches on this type of insulation.