The interior of the triangular and riser panels consists of Georgia Pacific ¼” thick Dens-Deck Roof Board adhered to the rigid seven inch thick block of Expanded Bead Polystyrene (E.P.S.) insulation with nonsolvent latex adhesive.   So you do not have trowel stucco or plaster to the insulation nor do you need to cut sheet rock and adhere the pieces to the dome shell panels.....the wall board is already installed on the triangular and four foot tall riser panels. 

The wall board employs fiberglass mat facing instead of paper on both sides of the board.  The core is silicon treated gypsum providing excellent moisture resistance,  fire resistance and adhesion properties.  It doesn’t provide fuel for an accidental fire.  It isn’t even damaged by multiple immersions in water.  It won’t harbor spores that create sick homes.

One square inch of the adhesive that is used to adhere the board to the insulation will support 10 pounds.  A square foot (144 square inches) of the wall board weighs less than 2 pounds.  In other words there is much more holding power than is needed. 

Glass mats embedded into core on both faces results in dimensional stability and prevents warping.  The glass mat is encapsulated with a coating which reduces skin irritation from exposed glass fibers.

The moisture-resistant inorganic core has superior mold, mildew and fire resistance.

The Dens-Deck Board which is a roofing board was used on The New Orleans Sports Arena in New Orleans Louisiana.  The following info was taken from Georgia Pacific’s ¼” Dens-Deck roof board data sheets:

Dens-Deck roof board features an inorganic glass mat embedded into a water-resistant treated gypsum core.  The combination of glass mat surfacing and a treated core renders Dens-Deck roof board more resistant to delamination from water than paper-faced gypsum products.  Comparative testing has demonstrated Dens-Deck roof board’s supremacy over such alternatives as perlite and fiberboard. Its engineered features make Dens-Deck roof board the obvious substrate for roofing membranes.  Resists delamination, deterioration and warping, puncturing and other job site damage and resists rot.

Fire Protection:  Because of its noncombustible core and surface, Dens-Deck roof board offers greater fire protection than other conventional products.  Dens-Deck roof board, when tested to ASTM E 84, has achieved a rating of 0 flame spread and 0 smoke developed.  Noncombustible when tested in accordance with ASTN E 136.

Properties of Dens-Deck: Noncombustible, Water Resistance, Dimensional Stability, Decay Resistance, Resistant to Warping, Rodent and Fungus Resistance, Torch Safe, High Compressive Strength.

Fire Classification:  FMRC Class 1.

Mold & Mildew Resistance:  No growth when tested in accordance with ASTM D 3273.

Onsite Finishing:  Onsite it is reduced labor for the exterior and interior dome shell finishing in that for the exterior finishing you only concrete the options and seam areas between the component panels with the special formulated cement.  You do not concrete the entire dome exterior.  For the interior finish you apply joint compound and tape on the wall board seams and paint the wall board. 

Special Formulated Cement:  The American Ingenuity Dome Building Kit includes fibers and admixtures.  Locally you purchase bags of Portland cement and sand.  Following the recipe in the Assembly Manual, you mix a predetermined amount of fibers and liquid admixtures with a bag of Portland cement and water. This produces the special cement that you trowel into the seams between the panels and on to the entryways and dormers.  Click on Concrete to learn more.