Corbond Corporation

Builder - Application Guide

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	Building Section - Corbond Wall & Cathedral Roof

Application Guide - Corbond III - Technical Data	PDF File Here

Application Guide - Corbond III	PDF File Here
(Finance Solutions - For Dealer in Business Less than Two Years)

Application Guide - Corbond III	PDF File Here
(Finance Solutions - For Dealer in Business Two or More Years)

Description
This system is a sprayable rigid polyurethane cellular plastic foam insulation system designed to insulate buildings. The sprayed product results in a seamless, monolithic and durable insulation fully adhered to the substrate.

CORBOND® spray systems are technologically advanced, sophisticated materials and should be only be applied by qualified, experienced spray applicators.

Walls
CORBOND® may be applied without primer between studs to a variety of sheathing substrates to the desired thickness. suitable sheathings include but are not limited to: Plywood, OSB, any foam sheathing with or without foil facers, Rock, Brick, CMU, Concrete and Steel. CORBOND® may be applied to theses same substrates without studs as well.

Cathedral Ceilings
CORBOND® may be applied directly to the underside of roof sheathing between the rafters to the desired thickness. Traditional venting is not necessary.

Vapor Retarders
No additional vapor retarder need be installed over a cavity wherein CORBOND® has been installed. Because of CORBOND®'s low permeance rating and excellent sealing characteristics, it is its own vapor retarder. The elimination of a second vapor sheet will avoid the creation of what is commonly known as a moisture vapor "trap". (Special environments such as freezers, swimming pools and others require special technical assistance - please consult CORBOND® technical personnel.)

Clearances to Heat Sources
A minimum of 3" clearance is required between and combustion appliance flues, firplace flues, recessed can lights (not withstanding labels or approvals for insulation covering), heat lamps, or other heat producing sources.

Combustion Air to Combustion Appliances
Modern construction techniques of house tightening require that outside air inlets be provided to deliver combustion air to natural gas, propane or oil fired appliances such as furnaces, boilers, water heaters, space heaters etc. Backdraft dampers or positive pressure venting may be needed on combustion appliance vents to prevent negative air pressures developed by bath or kitchen vent fans from backdrafting combustion effluent into the building interior.

Fire and Thermal Barrier
Warning: Polyurethane Foams Will Burn When Exposed to Fire.
Polyurethane foam produced from these materials may present a fire hazard if exposed to fire or excessive heat (i.e. cutting torches or soldering). The use of polyurethane foam in interior applications on walls or ceilings presents an unreasonable fire risk unless protected by and approved fire resistant thermal barrier with a finish rating of not less than 15 minutes. A code definition of an approved "thermal barrier" is a material equal in fire resistance to ½ " gypsum board. Each firm, person, or corporation engaged in the use, manufacture, production or application of the polyurethane foam produced from these resins should carefully examine his end use to determine any potential fire hazard associated with such product in a specific use and to utilize appropriate precautionary and safety measures. Consultation with building code officials before application is recommended.

Substrate Preparation
For optimum results, surfaces to receive CORBOND® should be clean and dry, free of dirt, oil, solvent, grease, loose particulate, peeling coating and other foreign matter.

Untreated wood, plywood, and oriented strand board (OSB) typically do not need primer. CORBOND® also adheres well without primer to expanded polystyrene, extruded polystyrene, foil faced insulation boards, concrete masonry units (CMU) and cured concrete.

Ferrometallic substrates (especially mild steel) should be sand blasted in accordance with SSPC-SP6. Sand blasted surfaces should be immediately primed with an epoxymide primer as recommended by the primer manufacturer.

Galvanized and stainless steel surfaces should be treated with an appropriate wash primer prior to application of CORBOND®. Consult your primer manufacturer or Corbond Corporation for a specific recommendation.

Substrate Temperature
This spray system is provided in different reactivity profiles to meet varying substrate temperatures previously noted. At the lower end of the recommended temperature range, flash passes are to be avoided. CORBOND® technical personnel should be consulted in all cases where application conditions are marginal.

Indoor Application Precautions
All personnel in the spray area must be equipped with a fresh air supplied face mask or hood.

Additional precautions include:
a. Post warning signs at all work area entrances.
b. Seal off the work area from adjacent rooms and ventilation ducts.
c. Mask areas required to prevent overspray such as windows, doors, tubs and showers, etc.
d. Restrict the access of non-application personnel.
e. No welding, smoking or open flame.
f. Provide ventilation as needed.

Outdoor Application Precautions
The area surrounding the spray operation should be protected from overspray and exposure of individuals not involved in the spray operations as follows:
a. Post warning signs a minimum of 100 feet from all work areas.
b. Close all air intake vents on air handling equipment on the building.
c. Limit spectators.
d. No welding, smoking or open flame

Climatic Conditions
Spray systems should not be applied when the wind velocity is greater than 15 mph to avoid over spraying of perimeter areas. Higher wind speeds also retard the exothermic reaction of foam and can lead to poor adhesion and increased density as well as thermal shock.

Moisture in the form of rain, dew, frost or other sources can seriously affect the adhesion of CORBOND® to the substrate or to itself. Water reacts with the mixed foam components, seriously affecting the foam's physical properties.

CORBOND® must not be applied to a thickness exceeding 3 inches in a single pass, allowing a curing time of 10 minutes per inch before applying second pass. If this thickness is exceeded, the internal temperature building up within the foam may cause internal charring of the foam applied, seriously affecting the quality and physical properties of the foam. Under certain conditions, applications exceeding this maximum recommended thickness may cause spontaneous combustion of the foam to occur, even hours after product was applied.

NOTE: A Material Safety Data Sheet on product components and the finished product are available from Corbond Corporation. Users of this product should read and understand the MSDS before use.