Geodesic Dome Homes – Pros and Cons
But it’s no secret that certain shapes are more conducive to a structure than others. Although many homes and buildings have unique and original designs, the vast majority of them share a common characteristic – their faces are planar and rectangular.
There are numerous benefits to dome homes, which are simply homes constructed into the shape of a dome – partially or completely. They are unique in appearance as well as construction methods. Following is a list of positive attributes going for geodesic homes:
Due to the strength of an arched surface as opposed to a flat one, dome homes are considerably stronger against natural disasters – earthquakes, tornadoes, hurricanes, even fires. Obviously, the materials with which the structure is made out of has a lot to do with it, as well as the method of construction.
using a technique that incorporates an “airform” around which the structural elements are added to stiffen the dome. The airform is inflated to establish the dome shape and size, and polyurethane foam, steel rebar, and a cement-based finish are applied from the inside. An exterior coating is applied on the outside to complete the structure.
is a dome that is constructed in “one piece” such as the one detailed above, as opposed to one that is a joined network of many triangular or hexagonal planes.
Heat is both lost and absorbed through surfaces that have direct contact with the outside. Being that domes have the smallest surface area for a given volume, this essentially provides better insulation. Smaller surface area equals higher R-value due to less surface area through which thermal energy can be transferred.
Dome homes are extremely green in terms of cost, building materials required, and future maintenance and upkeep. This goes hand in hand with the above two points. Because the sphere has the greatest volume given a certain surface area, it stands to reason that it also is the most economic to construct in terms of size and available budget.
– taking into account various internal walls and such to adequately brace a non-dome structure. And because the dome design is extremely resistant to winds as well as seismic activity, it has a comparatively long life, needing very little maintenance. – All collaborating to make it a very green home.
This is perhaps the biggest disadvantage going for dome homes – the fact that for all the volume it has, the actual usable space within this volume is limited. Crescent-shaped space is lost behind furniture pushed up against the dome wall, as well as a lack of headroom along the peripheral boundaries.
The outer shell for example, often being a network of triangles, requires large amounts of irregular-shaped triangles that in most cases must be cut from rectangular materials. Any future improvements – additional walls, etc – joining with the dome wall must be customized to follow the curved contour.
Electrical circuitry, plumbing, and other utility cables, are typically installed throughout the maze of walls and ceilings of a house. But due to a minimal amount of internal walls within a dome home, all such wiring and plumbing must take a significantly longer path, adding to the needed raw materials and man-hours.
Unless it’s a monolithic – meaning a “one piece” – dome homes have many seams. Such domes are susceptible to water and moisture damage via each of these seams, as well as attack from the sun. Some designs utilize an overlapping system of faces which will ideally protect the joints from the rain, but remains partially vulnerable to thermal damage from the sun.
This translates into potentially humid, damp, and stuffy environments. Dehumidifiers are a must for monolithic domes unless you live in an extremely dry region.
As you may have guessed, this type of design is a rather niche market for the few, not the many. As such, potential buyers will also be limited.
Not that this matters necessarily, but neighbors may perceive a dome home as an eyesore due to its “Starwars-like” appearance – especially when nestled right in the middle of a row of “model home” type houses. This can also be directly linked to the above point on resale difficulty.
, the decision to choose this style of construction over more mainstream ones may be more a matter of personal preference than a question of “which is better”. Different people have different perspectives and priorities, and both types have their individual pros and cons going for them.
You can experiment with a hybrid style of construction, or have 2 separate, smaller buildings adjacent to each other – one dome and one rectangular. This will still be going “part-green”, and giving you the best of both worlds. – Just an idea.
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