Budget Solar Retrofitting

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Finally, one must upgrade the basement or crawl-space and make a serious effort to shut off ground water and, more importantly, the invisible movement of ground moisture as water vapor into the home. Even the best insulated modern homes, which are reasonably insulated as required by code on 5 sides of their "box," fail to close themselves off from ground moisture. The vast majority of homeowners spend a goodly portion (5-10%) of their heating and cooling budget trying dry out the ground under their house Mid never succeed. You could test yowl own home during winter conditions by placing a 10-15 square foot piece of a vapor barrier over your concrete basement floor or crawlspace dirt and you will observe with in a day water droplets on its earth sick. Many methods are available to mitigate this undesirable moisture movement. It your basement is usually dry and crack free, you can apply one of the quality liquid surface treatments designed waterproof the concrete. A crawl-space can be fixed by installing a large piece of Flatic vapor barrier everywhere, and carefully sealing all penetrations with the edge held in place by weights such as bricks or pressure-treated wood scraps. Older, uneven rock-lai d or degraded basements will need further, more extensive efforts.

Fourth: The previous reasoning with windows its solar collectors also applies toy new or existing doors with glass placed (oil sunny exposures. That old wooden door was a 40-60 lb. object that you slammed a few thousand times each year and still had expectations of it's sealing tightly. The old saying that such doors were so poorly scaled that "you could throw a cat through them" is not as ridiculous as you might think. Modern doors with urethane core insulation, steel or fiberglass facings and the latest insulated glazing are a huge improvement over the older wooden door. The major improvement is in their sealing, on roughly 20 linear feet of perimeter crack with a deformable or magnetic gasket These doors are one of your best retrofitting buys as they reduce air leakage to a small percentage of the average door that they replace.

Since the average structure has a large portion of its energy losses from air movement through many unsealed cracks and openings, we need to make a concerted effort to tackle them. One needs to consider both in-filtration and ex-filtration of air, both driven by the obvious causes of the wind with attendant door and window crack leakage. Those air leaks are in fact driven in larger part by unrealized factors such as door operation, vent fan operation and barometric pressure changes. Additionally, perhaps the most common leakage is one caused by air expanding as we heat it. During an average winter, the interior air will need to be heated an average of 50°F. As the air heats, it expands, and requires that much more prevention from escaping. Sealing of the myriad gaps beyond that of window and door openings and their frame cracks involves a careful examination of your home's complete exterior. A good place to start is the clothes-dryer vent. Typically these vents are a perfect example of how not to insulate an opening, with its skimpy aluminum flapper. Purchasing a substantial plastic replacement with a vertical outlet capped by an upside-down can would be a tremendous start. The can is simply lifted off its pipe during operation and closed by gravity. Other fan vents should also be checked and improved where possible. The last vents to check would be those that service the attic space above your insulation, as they may well be too small for the job. Check the latest information on venting above insulation, and upgrade yours accordingly.

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