PH-1Contemporary Exterior, Seattle
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By installing a permeable driveway, you’ll be directly protecting the integrity of our natural resources, supporting groundwater recharge and adding green space to help balance carbon dioxide levels.More: Easy Ways to Manage Stormwater for Lower Bills and a Healthier Earth
There are even pervious asphalt and concrete options that can replace traditional materials on high-traffic driveways or entry roads. Basically, the structure of these materials is similar to that of conventional concrete but with wider pores. I’ve heard conflicting conclusions about cost estimates of porous asphalt, as compared to conventional asphalt. It seems that even though the initial cost of materials is higher, some people believe that the porous system ends up being cheaper over the life span of the driveway or road. Bear in mind that a proper conventional asphalt road or driveway should incorporate a stormwater collection and treatment system, which would affect the overall cost.Porous asphalt is now being used across Europe in highways because of the reduced risk of accidents from standing water or ice. From what I understand, research is still being done on the performance of porous concrete in cold weather.
The house was assembled onsite from a kit in a little more than seven months. This image shows the two-car garage with Sam's office above, the natural wood shiplap siding and the chartreuse HardiePanel — all low-maintenance materials that were carefully detailed to resist the elements gracefully. "Sam's home office above the garage is a real workplace for him. He telecommutes some days of the week, which saves on his commute time and gas and gives him more time with his family," says Johnston.
The zone in front of the garage is just as important as, say, the garage door or where the garage is located relative to the house. An increasingly popular approach is to use a drivable grass surface, be it a product that is hidden beneath the blades or incorporating grass between pavers. Grass paving allows water that would normally run into the street and sewer to enter the ground and be naturally filtered. Here grass is found next to the garage, at the bottom of a more traditional driveway.
Johnston's firm has won awards for traditionally built custom homes and has recently designed and completed its first custom prefab home. VB: What would you say are the main benefits of a prefab home? HJ: Done right, a prefab home can be greener, it can be less expensive (although we as an industry haven't really figured out how to do this at the same level of quality as a custom home). However the main benefit is that it is less hassle. The construction time is shorter, you spend less time on the site, and there's less guesswork and mid-construction changing involved. Above: The facade of a panelized prefab design by PLACE Architects, done in one of three models that the firm offers.