Renewable Resource Construction: Building a Sustainable Future with Energy-Efficient Designs
What do we mean by renewable resource construction and sustainable renewable energy construction designs? Most of our stock plans that we sell on our site: Ecosustainablehomedesigns are designed for frame style construction since this is the construction method most used in the United States. However, instead of designing for wood frame construction, which is used most in conventional construction, we specify using light gauge steel studs for the primary structure of the house. Here are some of the reasons why we adopt these design criteria: Using wood for structural framing is not sustainable. There is already a huge supply and demand issue, which means that the demand for wood for framing exceeds that which regional forests can supply. Here in the Southeast region as an example most of the framing materials are not from regional forest of Southern Yellow Pine but conifers from the Northwest, Canada, Finland, and Norway. This means we are stripping wilderness forests to meet our immediate needs in construction. Life on earth is dependent on these wilderness forests to absorb carbon dioxide which is the product of burning fossil fuels and creating the earth warming greenhouse gases. These forests are necessary for the oxygen they add to the environment. The carbon footprint is highly significant especially if you take into account all the energy required to import and export these materials around the world. I invite you to take a look at satellite images of these forests such as the deforestation of the Amazon rainforest. If those images do not alarm and horrify you, then it is likely you could not be convinced to adopt a more sustainable lifestyle and lower your impact on the environment. Here is just one small image from the International Space Station of the deforestation of the Amazon. This image covers approximately 100 square miles. Using non-regional lumber makes for all the ingredients for a high maintenance house. All trees have a natural adaptation to the climate in which they grow as well as resistance to the insects present to its environment. When you use non regional forests for your structure then these woods are more susceptible to rot, and growth of harmful organisms such as toxic black mold and then succumb to insect infestation. Using 2×4 wood studs limits the thermal mass that can be achieved for a highly energy efficient envelope which of course translates into energy consumption and higher utility bills. Thermal mass is measured by resistance to heat transfer. The best that can be achieved with a 2×4 wood stud wall is R-15. Whereas in a 2×4 steel frame wall you can attain R-22 by using solid high thermal mass insulation, which is non bias unlike fiberglass insulation. The difference is that fiberglass is designed primarily to slow down the transfer of heat from the inside out, whereas solid polystyrene foam resists this transference from both sides. Another issue with wood frame construction, in terms of renewable resource construction, is that in a span of a wall the greatest energy loss is the place where the wood studs reside. You can see this on a morning after there was frost overnight. You will notice that the location of the studs is telegraphed in the siding. This is of course due to the loss of heat through the wall where the studs are. Using solid thermal foam sheathing against the outside of a stick framed house is not appropriate because in a climate that has a high relative humidity, condensation occurs which accumulates on the inside of the wood framed wall setting up the conditions for rot and insect infestation. This is the reason why synthetic (EFIS) stucco was such a disaster for homeowners who owned such houses. Furthermore, sprayed in expanding polystyrene foam between the studs is not appropriate for a wood framed wall in renewable resource construction since such walls need to be breathable to avoid such moisture accumulation being trapped between the inside of the wall. What follows wood decay is the wood becomes the food for dangerous organisms such as black mold. Steel framing is a more renewable resource than wood. Most light gauge steel is not from mined ores but from recycling existing metal and whatever scrapes are left after construction are completely recyclable. There is also less waste than using wood for framing since every piece in a pallet is straight and true unlike a pallet of wood framing materials where you will have a half a dozen or more boards that are twisted, warped, split or checked and good for nothing. The difference in materials costs between wood and steel is minuscule. The price difference is metal framing material is less than 2% more than wood framing materials and when you take in the fact that in every pallet of wood you will have waste then the difference is moot. All our designs utilize sustainable renewable energy both passive and active energy components by integrating simple principles of thermal dynamics. All our plans are designed to maximize the benefits of natural convection air flow which always works and is free energy. By working with instead of working against convection air flow we use this principle to reduce energy loads for both cooling and heating the house. Read Also:-Stop Dreaming – Start Building Your Eco-Sustainable Home Today All our plans use the integration of clerestories or dormers to draft out hot air and to provide natural lighting throughout the day. In custom plans which are designed specifically for your lot we do an extensive analysis of the natural resources present on your property and how to use these resources in both the construction of your house and in the heating and cooling systems. All our plans call for the use of Evacuated Tube Solar Thermal Collectors to provide domestic hot water and for water source heating and cooling. As compared to Solar Photovoltaic electric generation the initial cost is relatively low but the benefits are enormous. They provide 100% free renewable