Houses are Complex Systems

Houses have become complex systems to build. Each decision can impact other factors in the construction process. Let’s consider spray foam insulation. Spray foam insulation is a great product, and seals the home much better than standard insulation. It then requires that outside air be brought in through the heating and cooling system for air quality. The heating and cooling system should be resized, because a smaller unit can take care of more space. Plus the roofer will need to know to leave off the ridge vents, because the attic is typically sealed. Also, radiant barrier roof decking does not work if the foam is applied directly against the back of it, so the radiant barrier is not typically used for this application. However, DuraVent can be used to provide an air space, allowing the use of the radiant barrier decking. If gas heat or hot water heaters are being used, different venting is required, again because the house is sealed. So the decision to use one product impacts the decisions on a variety of other products. There are some great products available helping to reduce our energy use, but they need to be considered in the complete building package.

Mortgage update – interest rates are down on permanent loans, but the market is still volatile, so rates will continue to jump around. According to Michael Robertson with American Bank of Commerce, "Financing is still available for qualified buyers. Banks like to see a little skin in the game - down payment - and the ability to service the debt. We are back to the basics."