Eco Block ICF

[Jim Robinson]

I can't find any specs in their instructions that require them to be covered on the exterior of the house. Anyone know of a IRC requirement?

Cool house today. It was designed by Frank Loyd Wright's company. The addition in 1999 made it even nicer, and it's a stylin' place now.

[Jerry Peck]

R611.6.3 Insulation materials. Insulating concrete
forms material shall meet the surface burning characteristics
of Section R314.3. A thermal barrier shall be provided
on the building interior in accordance with Section
R314.2 or Section R702.3.4.


R314.3 Surface burning characteristics. Unless otherwise
allowed in Section R314.5 or R314.6, all foam plastic or foam
plastic cores used as a component in manufactured assemblies
used in building construction shall have a flame spread index of
not more than 75 and shall have a smoke-developed index of
not more than 450 when tested in the maximum thickness of 4
inches (102 mm), provided the end use is approved in accordance
with Section R314.6 using the thickness and density
intended for use.

Exception: Foam plastic insulation more than 4 inches
thick shall have a maximum flame spread index of 75 and a
smoke-developed index of 450 where tested at a minimum
thickness of 4 inches, provided the end use is approved in
accordance with Section R314.6 using the thickness and
density intended for use.


R703.1 General. Exterior walls shall provide the building
with a weather-resistant exterior wall envelope. The exterior
wall envelope shall include flashing as described in Section
R703.8. The exterior wall envelope shall be designed and
constructed in a manner that prevents the accumulation of
water within the wall assembly by providing a water-resistant
barrier behind the exterior veneer as required by Section
R703.2. and a means of draining water that enters the assembly
to the exterior. Protection against condensation in the
exterior wall assembly shall be provided in accordance with
Chapter 11 of this code.
(see list of exceptions - ICF not listed)