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View PricesThe Dome Store > Dome Insulation Systems > Fiberglass Batt Insulation

Fiberglass Batt Insulation

 

The Natural Spaces Super-Wal dome system was originally designed as an ultra-super-insulated wall for using fiberglass batt insulation. We offer dome shell thicknesses of 12 1/4", 15", 18 1/4", 21" and 24". These provide R-values up to incredible levels of 76 to 83 (see chart below).


EcoBattNatural Spaces Domes is now using the next generation of Sustainable Insulation...

EcoBatt
Think of it as green, only browner

Knauf EcoBatt™ Insulation doesn't look like any insulation you've ever seen, but that's because its natural brown color represents a level of sustainability never before achieved.

The color comes from ECOSE™ Technology, a revolutionary, new sustainable binder born from five years of intensive research. Made from rapidly renewable organic materials rather than petroleum-based chemicals commonly used in other insulation products, ECOSE Technology reduces binder embodied energy by up to 70% and does not contain phenol, formaldehyde, acrylics or artificial colors used to make traditional fiberglass insulation.

EcoBatt Insulation combines sand, one of the world's most abundant and renewable resources, post-consumer recycled bottle glass and ECOSE Technology to create the next generation of sustainable insulation...naturally from Knauf.

EcoBatt does not support microbial growth or attract insects or vermin. In addition to being classified as mold resistant by GREENGUARD, EcoBatt Insulation has passed exhaustive entomological testing at leading institutions in the US and UK.

It is also classified as noncombustible with a flame spread under 25.

For more information on EcoBatt™,
Click here to go to Knauf Insulation's web site.


If someone tells you there is a "point of diminishing returns" in relation to R-values, they haven't looked at today's and tomorrow's energy cost.When compared using the same R-value, fiberglass batts are 1/3 the cost of rigid polystyrene foam insulation or Icynene insulation and 1/5 the cost of sprayed-in-place urethane foam. Check with us for a cost saving comparison and the most up to date environmental info. Our installation methods and our use of industrial grade fiberglass reduce air infiltration dramatically, allowing an honest comparison of R-values with other insulation types.

Some dome companies claim they can get an R-35 using 2x4 construction. Building codes allow only a maximum R-value of 6.25/inch for figuring urethane foam-insulating values. Multiply that times 3 1/2” thick struts and you get an R-22.

Other companies also say that there are vastly diminishing returns beyond a certain R-value. Currently, the minimum ceiling R-value for the northern tier of the U.S. is R-38 with some areas at R-49. 25 years ago these same "authorities" were suggesting an R-19 ceiling. How will it change in the future? Why build a dome home with 2/4’s or 2x6’s that starts out 25 years behind the times?!

You actually pay substantially less for a Natural Space dome with an R-64 value than you do for the competition’s dome with an R-30! We offer industrial type "certified grade" high density batts in various thicknesses of 6”, 8” and 9 1/2”. We put in 2 layers creating 12”, 16” and 19” thicknesses of insulation. For those extreme areas, we use 3 layers totaling 22" of insulation.

Not readily available in the residential market, we offer 60”, 72", and 96" wide rolls of insulation. This eliminates the joint lines occurring if you were to use 24" wide batts. It also cuts down the installation time considerably. This seamless one-piece triangle insulation works extremely well in our Natural Spaces dome because we do not require all of the internal studs all of the other dome systems need. Our triangle spaces are wide open, just waiting for a full-size fiberglass insulation triangle.

The insulation is cut on site using templates. We include a 6” knife, 2 filter masks and goggles.

Starting in 2014, we also are including full size triangle templates for cutting our wide batt fiberglass.  These are made from 1/2" waferboard.

Fiberglass batt insulation, we have found, is the safest and most economical type for our domes.

Insulation

(Photos show older type of Knauf Insulation)

Triangle Insulation InstallPati InsualtionInsulation Triangle
Dome Shell Insulation R-Values using Fiberglass
Dome Shell Thickness Vented Shell R-Value Insulation Thickness (Vented) Unvented Shell R-Value Insulation Thickness (Unvented)
7 1/4" 26 6" 30 7 1/4"
12 1/4" 39 9 1/2 " 49 12 1/4"
15" 49 12" 60 15"
18 1/4" 64 16" 71 18 1/4"
21" 75 19" 82 21"
24" 86 22" 93 24"
The basic insulation we use is Knauf certified grade high density Eco-Batt fiberglass made for the industrial market.  Click here for an in-depth brochure by Knauf. The air infiltration is minimal. The R-value chart uses an established value of 3.7/inch. Our insulation will perform at this higher number by following our installation methods. The R-value numbers used in the chart include the entire wall/roof assembly of materials.

Prices and Ordering

Fiberglass Insulation for the Dome Exterior Triangles

Exact quantities needed for each dome are based on how many extension openings and skylights are in your dome.
(No separate shipping cost when ordered as part of the dome shell package. Shipping costs vary with distance to site, so please call for an accurate quote or to order.)

Title/Description - Knauf "Ecose" certified grade Price Shipping
Fiberglass batt
4" thick x 72" x 75'
$232
Call
Fiberglass batt
6" thick x 60" x 50' (double for our 15" thick wall)
$194
Call
Fiberglass batt
6" thick x 72" x 50' (double for our 15" thick wall)
$231
Call
Fiberglass batt
6" thick x 96" x 50' (double for our 15" thick wall)
$305
Call
Fiberglass batt
8" thick x 60" x 35' (double for our 18" thick wall)
$210
Call
Fiberglass batt
8" thick x 72" x 35' (double for our 18" thick wall)
$249
Call
Fiberglass batt
8" thick x 96" x 35' (double for our 18" thick wall)
$329
Call
Fiberglass batt
9 1/2" thick x 60" x 25' (double for our 21" thick wall)
$173
Call
Fiberglass batt
9 1/2" thick x 72" x 25' (double for our 21" thick wall)
$206
Call
Fiberglass batt
9 1/2" thick x 96" x 25' (double for our 21" thick wall)
(not a stock item)
$271
Call

Insulation - Super-Wal Strut Fillers (Rigid Foam)

Rigid Foam (Non-CFC) pre-cut pieces fit between the 2x8 outer strut and 2x4 inner strut to create a flat edge for the fiberglass insulation. Helps eliminate wind-wash & air infiltration. Sold in packs of 10.
(No separate shipping cost when ordered as part of the dome shell package)

 

Title/Description Price Shipping
10 pack of Rigid Foam Pre-Cut Fillers
1 1/2" x 4 1/4" x 96" (for 15" Super-Wal)
$20
Call
10 pack of Rigid Foam Pre-Cut Fillers
1 1/2" x 7 1/2" x 96" (for 18 1/4" Super-Wal)
$29
Call
10 pack of Rigid Foam Pre-Cut Fillers
1 1/2" x 10 1/4" x 96" (for 21" Super-Wal)
$35
Call
10 pack of Rigid Foam Pre-Cut Fillers
1 1/2" x 13 1/4" x 96" (for 24" Super-Wal)
$40
Call
 

 



Strut Filler

Insulation - Standoff Spacers (Rigid Foam)

Rigid Foam (Non-CFC) pre-cut pieces to hold insulation in place & maintain air space. Used on first row of triangles for high & mid profile domes only. Sold in packs of 10.
(No separate shipping cost when ordered as part of the dome shell package)

Title/Description Price Shipping
10 pack of Rigid Foam Pre-Cut Spacers
1 1/2" x 3" x 96"
$13
Call

Venture Vapor Barrier Tape

Venture Sealing Tape is the one to use for sealing all the seams on your vapor barrier. Reduce leakage and achieve energy savings. In Minnesota, state building codes require all seams on vapor barriers to be taped.

Independent tests by the National Association of Homebuilders show a 30% increase in performance when exterior house wrap seams are sealed. Used on the interior vapor barrier, taping the seams would almost eliminate any air infiltration, as proven by blower door tests on our Bear Creek Dome. (No separate shipping cost when ordered as part of the dome shell package)

Title/DescriptionPriceShippingCheck to Order
Venture Air/Vapor Barrier Sealing Tape
1 7/8" x 216'
$15
US: $3


Vapor Barrier tape
 

MemBrain™—The Smart Vapor Retarder.

Especially in climates with extreme seasonal fluctuations in climate and humidity,
there’s no foolproof way to keep moisture from getting into a wall. But now there’sMemBrain
a revolutionary way to help get it out.

Designed to be applied over unfaced fiber glass insulation, MemBrain looks similar
to typical polyethylene sheeting, but is actually a polyamide-based material. But
what makes MemBrain unique is its ability to adapt its permeability depending on
climatic conditions.

With a high resistance to water vapor in winter or low humidity, MemBrain
behaves like a moisture vapor retarder such as poly sheeting. When the relative
humidity increases, its water vapor permeability increases dramatically. This allows
water vapor to escape the wall cavity easily when the humidity is high.

MemBrain is recommended only for heating climates needing some cooling in the
summer (The middle of the USA from midwest to the east coast in IRC zones #3A
and #4A, mixed-humid climate zones). We are also using it in the high desert climate zones in Utah and Nevada when we do an unvented dome shell using blown-in fiberglass that fills our Super-Wal cavity.  It is not suitable for areas or buildings with very high, constant indoor humidity levels above 50%.

Click here for more information on MemBrain™

Standard rolls are :

Title/Description Price Shipping
12.33' x 100' (1233 sq. ft)
(not stocked)
(376 cm x 30.5 M = 114.7 sq. M)
$298 / Roll
Call
10.33' x 100' (1033 sq. ft)
(not stocked)
(315 cm x 30.5 M = 96.1 sq. M)
$245 / Roll
Call
9.33' x 100' (933 sq. ft)
(284 cm x 30.5 M = 86.6 sq. M)
$213 / Roll
Call
8.33' x 100' (833 sq. ft)
(254 cm x 30.5 M = 77.5 sq. M)
$195 / Roll
Call

 

Natural Spaces Domes
37955 Bridge Road
North Branch, MN 55056, USA
Natural Spaces Domes Website
Copyright ©2014 Natural Spaces Domes
Local: 651-674-4292
Toll-Free: 1-800-733-7107
nsd@naturalspacesdomes.com