American Ingenuity can design custom or modified basement plans for a reasonable fee. The Ai prefabricated panelized home kit can be built on a basement.
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To view floor plans by dome size, some of which have a basement designed, click on Stock Plans. If you do not see a stock plan to fit your lifestyle, Ai can modify or customize a plan based on your notes or sketches. Please email your sketch or notes by clicking on Contact Us. The Plans Coordinator will review your sketches and contact you to clarify your needs and email a Plans Quote. During the basement plans design, Ai will email a basement questionnaire. When you want Ai to start the design of your plans, pay in full for your plans, engineering and agree to the Plans Quote.
To complete an foundation other than concrete slab, Ai hires a local PE engineer. He requires a soil report or Geotechnical Report where a soil engineer makes recommendations on the type foundations which can be built on that type soil. Talk with a foundation subcontractor and determine which type foundation fits your budget. The engineer reviews your soil report and the type foundation you want designed, calculates the load of the dome and its interior floors to determine joist size and spacing and wall design. Ai then incorporates his designs into your basement building plans. Depending on the type foundation to be designed, his fee is $200 to $500.
This is not the fee for a engineer licensed for your state to seal your building plans and basement plans. The Engineer’s Seal fee is $900 for one dome on a basement. FYI prior to utilizing the independent engineer to seal the plans, Ai had to hire engineering firms and architectural firms. Their fee was minimum $2,000 to $3,000 to seal plans for one dome on a basement. The seal fee varied depending on the square footage in the dome.
Ai can provide plans for basement wall systems from poured on site concrete walls or concrete block walls or insulated concrete forms (ICF) or precast basement wall panels.
Soil, soil, soil. The dome’s standard footing size is 20″ tall by 16″ wide with slab 4″. Foundation should be built on undisturbed native soil or fill – with soil compacted to 98% density for a minimum of 2,000 psf of bearing pressure. If your bearing capacity is less, then the engineer can increase your footer size and slab thickness. For example the soil for a dome being built in California was 1,500 psf. Its footer was increased to 20″x20″ and slab was increased to 6″. In some instances the footer may need to be an augured footing three feet down to hit cap rock. In other instances your footings may need to rest on wood pilings driven 40’ into the ground in order to get to solid soil. Ai does not determine the type foundation you need for your dome. You tell us what type footing and basement you desire based on your soil report. Generally a foundation cannot be built on clay and basement walls cannot be back filled with clay.
We are a manufacturer of dome housing kits and do not manufacture basement walls, please contact your local basement subcontractors for basement construction costs.
Full basements are the same size and shape as the dome first floor. The multiple sided foundation for the Ai dome can cost 15% to 25% more than a rectangle basement.
Basement walls are usually 8″ thick when made of poured concrete but will likely increase depending on the height of the basement wall and the height of the back fill.
The plans show rebars coming out of the basement walls to connect into the seams between the dome prefab riser panels and into the front and back of each entryway base panel and each first floor door dormer base panel, etc. Vertical rebars come out of the footings thru the buttress walls into the dome panels. Buttress walls support the entryway and first floor door dormer panels. The horizontal rebars in the buttress walls connect the buttress wall to the basement walls. After the basement is poured while the concrete is still malleable, insert in the top of the basement walls per the foundation plan the tie down hook rebars that go into the horizontal riser seams.
When the dome is built on a basement, the first floor framing of the dome is typically built with wood 2×10’s which are hung on the inside of the concrete basement walls.
Should I build a second dome for a garage or build a basement under the dome to use for my garage? The main determining factor on which kind of garage is built is whether your land is flat or sloped and your budget.
If your land is flat, we recommend a dome garage or conventional garage because building a dome on an above ground basement causes the access of the dome first floor via basement stairs or exterior stairs. Ai can design a lift if sufficient room in the basement or a rail chair on the stairs to access the dome from the basement.
If your land is sloped and the dome is built on a basement, parts of the first floor of the dome can be accessed at ground level or a few steps from ground level. Then building your dome on a basement is the better choice. When this is done, some parts of the basement will be open so cars can be driven into the basement. Other parts will be back filled with dirt so you can walk out the first floor of the dome to access your land.
For a complete summary of all types of foundations that can be used with the American Ingenuity Domes, click on Foundation Summary.
Ai DOMES BUILT ON BASEMENTS
8″ thick solid concrete basement walls for 34′ Dome
34′ Dome Home on poured concrete basement walls
Back view of the above 34′ dome; this side of the basement is bermed with dirt and French drain installed
Front view of the same dome with basement entrance.
Photo looking down into basement from second floor of 45′ Dome
Basement under 45′ Dome House
34′ Dome Home on basement
Insulated Concrete Form (ICF) Basement Walls being built for 40′ Aidome
40′ Basement ICF Walls with French Drain installed and footers back filled.
Q: Does American Ingenuity modify or design custom basement plans?
A: Yes, Ai can design custom or modified basement plans for a reasonable cost. Fax or email your sketch to us and we will call back with questions and complete a Plans Quote with fees for Ai to design your dome building plans and basement building plans.
Q: Can Ai design basement plans using concrete block, poured walls or insulated concrete forms?
A: Yes, we can provide plans for most types of basement wall systems utilizing poured on site concrete or blocks or insulated concrete forms or precast basement wall panels.
Q: What materials can be used to build the basement walls?
A: A company named Superior Walls supplies precast insulated concrete wall panels. Their number is 800-452-9255 or go to their web site www.superiorwalls.com
The following came directly from their site: The Superior Walls system consists of wall panels built with steel-reinforced concrete studs, 1″ rigid Dow® insulation, a reinforced top and bottom bond (footer) beams, along with a concrete facing approximately 2″ thick. The bond beams and concrete facing are cast in one continuous pour. Studs are connected by encapsulating vertical rebars and galvanized hooks and pins which protrude from the top, bottom, and back of each stud. Pressure-treated furring strips are pre-attached to the inner face of each stud. This provides the base for the owner/builder to finish the basement without having to add any additional studding. Holes are cast into each stud to accommodate wiring and small-diameter plumbing. The top bond beam is perforated to allow for bolting of the pressure-treated sill plates.
INSTALLATION – The SUPERIOR WALLS System: The panels are set on a bed of compacted stone which serves as a bearing layer as well as a drainage control system under the foundation. Once in place, the panels are bolted together at the top and bottom and sealed with a gun-applied adhesive-sealant. The owner/builder or builder then pours the floor slab inside the wall system.
Foam Blocks filled with Concrete are referred to as ICF for Insulated Concrete Forms. These blocks are easy to use and provide insulation. Their high cost is offset by labor savings in the assembly. Some of the many manufacturers are listed below. Call and ask them for the nearest supplier to you. One of the engineers utilized by Ai to engineer seal its building plans, prefers ARXX ICF wall to building a basement wall with concrete blocks. The ARXX ICF panel is 16″ by 4′ long which makes for quicker basement wall construction.
Reward Wall System, 800-468-6344, www.rewardwalls.com
Poly Steel, Albuquerque NM, 800-977-3676, www.polysteel.com
Insul Deck, Florence KY, 800-475-6720, www.insul-deck.org
Arxx, Alexandria Bay NY, 315-482-5253, www.arxx.net
Q: How is the below ground basement built and how is the dome attached to the basement walls?
A: The below ground basement can have the slab poured first with the exterior basement walls built on top of the slab or the footings can be poured separate with the exterior basement wall built on top of the footings and then the slab poured inside the basement wall. Basement walls are usually 8″ thick when made of poured concrete but will likely increase depending on the height of the basement wall and the height of the backfill.
Ai has basement plans available that explain how the dome is attached to the basement, etc. for example rebars need to come out of the basement wall to connect into the seams between the dome riser panels and into the front and back of each entryway base panel and each first floor door dormer base panel. Vertical rebars come out of the footings thru the buttress walls into the dome panels. Buttress walls support the entryway and first floor door dormers. The horizontal rebars in the buttress walls connect the buttress wall to the basement walls. After the basement is poured while the concrete is still malleable, insert in the top of the basement walls per the foundation plan the tie down hook rebars that go into the bottom horizontal riser seams.
When the dome is built on a basement, the first floor framing of the dome is typically built with wood 2×10’s, hung on the side of the basement walls and are supported by any interior basement walls or designed posts. The riser panels rests on the basement wall. When the riser panels bottom seam is concreted, the concrete continues down the side of the basement wall six inches.
Q: How thick are the basement walls?
A: Basement walls are usually 8″ thick when made of poured concrete but will likely increase depending on the height of the basement wall and the height of the back fill.
- Cover any part of the basement wall that will be in touch with soil with a tar emulsion (designed for this purpose). This waterproof coat should extend down to (and if possible, under) the polyethylene vapor barrier.
- If you wish, you may add additional waterproofing. Apply roofing felt over the tar emulsion, overlapping the edges 6” and sealing the felt with more tar. Place the roofing paper over the outside of the vapor barrier to shed water. Then, give the whole wall one more coat of tar. This extra investment will provide a superior measure of protection against moisture. Please, don’t cut corners.
- Place a perforated drainpipe (at least 3” in diameter to 4” in diameter. For long lengths), holes down, into the gravel bed. The pipe should be below the floor level and drop 1” for every 8’ of length. This discharges water into an area lower than the dome itself and allows quick drainage away from the building. Lay pipe in the gravel bed and cover gravel with two layers of roofing felt to prevent dirt from penetrating into the gravel.
- Backfill the entire area.