1 - GENERAL
Work under this section consists of furnishing of all labor, materials
and equipment necessary for or incidental to the complete and proper
installation of all cementitious foamed insulation as shown on the
drawings or specified herein, all in accordance with the contract
Material and installation shall conform to applicable building code
requirements of all authorities having jurisdiction.
See PART 3
Contractor is a licensed installer of air krete.
Contractor shall furnish evidence of training, experience and approval
Contractor shall furnish certifications that materials used are
fireproof, inorganic and free of carcinogenic mineral fibers or
Delivery, Storage and Handling
Materials shall be delivered to the site in clearly labeled containers
and mixed in strict accordance with the manufacturer's directions.
Materials shall be protected from the weather and other damage.
Damaged materials found unsuitable for use will be rejected and
shall be removed from the site.
Project, Site Conditions
air krete shall be installed when the combination
of indoor and outdoor temperatures is such that the temperature
at point of application is 40°F (4.5°C) and rising during the application
process and 48 hour initial curing.
If necessary for job progress, provide enclosures with heat to maintain
temperatures through initial curing.
Provide natural ventilation to properly cure the foamed insulation
during and subsequent to its application.
After completion of insulation work in an area, equipment shall
be removed and all surfaces shall be cleaned of all deposits of
2 - PRODUCTS
Cementitious Foam Insulation: shall be air krete,
foamed to a density of 2.07 lbs/cu ft ±6% so as to produce an R
value of 3.9 per inch of thickness as measured by ASTM C518-76 @
Retention Fabric: shall be 18 x 14 mesh aluminum screening or other
material sufficiently porous to permit curing of insulation and
sufficiently rigid to prevent deformation.
Vapor Barrier (if required): shall be 6 mil polyethylene film or
other suitable material impervious to moisture.
Attachments: shall provide support and protection to fabric and
insulation without failure under conditions of use.
3 - EXECUTION
Work of other trades: verify by inspection and with the general
contractor that preparatory work specified in Divisions 4, 5, 6,
15 and 16 has been properly done, i.e. that masonry block cores
and cavities are free of debris and excess mortar droppings, that
stud spaces are accessible, free of debris and contain all scheduled
pipes, conduits and non-heat producing devices and that heat-producing
devices and elements that are not inherently fireproof are shielded
such that insulation will be held 3" away.
Protection: Provide drop cloths, masking or other protection as
required to prevent damage to adjacent surfaces and equipment.
Mixing: Component materials shall be mixed using the quantities,
proportions and the pressures called for in the manufacturer's specifications
for the purpose intended.
Masonry, new: Completely fill block cores and cavities between wythes
in lifts not to exceed 8'-0".
Masonry, retrofit: Access between wythes with holes large enough
to accommodate hose, at 4'-0"; on center each way; fill cavities
completely; plug holes with non-shrink mortar to match existing.
Consult manufacturer for retrofit core filling.
Stud spaces, new: Apply retention fabric, attaching as required
to prevent sagging or deformation; foam stud cavity completely full,
leave interior finish (or vapor barrier when required) off until
foam has initially cured.
Stud spaces, retrofit: Access spaces 12'-0" or less in height
at a point two-thirds of their height above their bottom. Taller
spaces shall be accessed such that no lift of air krete
exceeds 8'-0". Fill spaces completely, plug holes after foaming
with material to match existing.
Ceiling spaces: Fill to depth shown in a manner similar to that
specified for stud spaces. If a vapor barrier is required, it may
be used as a combination vapor barrier and retention fabric only
if the construction permits air curing from above. If not, a separate
retention fabric must be used with the vapor barrier applied and
sealed only after curing.
Pipe chases; fill completely after all required inspections and
tests have been performed.
Fireproofing, very high temperature, sound deadening and encapsulation
applications: consult manufacturer.
Field Quality Control
Density: Contractor shall conduct a timed, field density check at
the beginning, middle and end of each days application. Check shall
be done in accordance with the manufacturer's instructions and log
of results maintained for the architect's review.
Continuity: At the architect's discretion, an infrared thermographic
test may be required. If the test proves the installation is satisfactory,
its cost will be borne by the owner. If the test shows discontinuity,
its cost and the cost of achieving continuity shall be borne by