Installation Instructions
Before installation begins, the roof deck should be firm, well attached, even, clean and dry. Proper attachment of the insulation is necessary to prevent roof failures. Atlas is not responsible for any damage caused by improper attachment. ACFoam® products can be attached to decks that are approved by FM Approvals and local codes. Atlas is not responsible for determining the suitability of the deck.
ACFoam® shall be kept dry before, during and after installation. Install only as much ACFoam® as can be covered the same day with completed roofing.
Although ACFoam® has been designed to withstand normal foot traffic, protection from damage by construction traffic and/or abuse is extremely important. Roof surface protection such as plywood shall be used in areas where storage and staging are planned and heavy or repeated traffic is anticipated during or after installation. Refer to Atlas Technical Bulletin #00-01.
Multi-Layer Installation
A two-layer application of ACFoam® is strongly recommended. The joints in each layer should be offset in order to avoid a vertically continuous joint through the total insulation thickness. Two layers (or more) with joints staggered can provide improved insulation performance by eliminating thermal bridges. This method also reduces condensation potential and thermal stress on the roof membrane. Refer to Atlas Technical Bulletin #00-01.
Mechanical Attachment
Mechanical fastening is the recommended method of attachment over nailable decks. Fastener frequency and spacing for steel, wood, cast-in-place structural concrete and poured gypsum decks are covered in the current Atlas Catalog according to the membrane system. Refer to the current FM Loss Prevention Data Sheet 1-29 for special considerations regarding perimeter and corners of the roof. Go to www.atlasroofing.com for typical fastening patterns for field area of the roof.
For further recommendations regarding attachment of insulation to lightweight insulating concrete decks or poured gypsum concrete decks, follow the instructions outlined in the NRCA Roofing Manual, Membrane Roof Systems 2007. ACFoam® products shall not be adhered directly to these decks by any bitumen or adhesive attachment method.
Adhesive Attachment
For installing ACFoam® to a structural concrete deck, adhesive/bitumen attachment is the recommended method. When using hot bitumen on concrete decks, priming is necessary. Precautions must be taken to prevent bitumen drippage. When using hot-applied bitumen for insulation attachment, the temperature of the bitumen should be approximately 50°F below the interply hand mopping EVT. The deck must be dry and care must be taken to apply the bitumen in sufficient quantity to totally cover the available deck surface. Use 18 to 30 pounds of bitumen per square to ensure proper attachment. To ensure embedment, the board must also be “stepped in” at several points while the bitumen is still hot enough to allow positive attachment. The recommended ACFoam® insulation size for hot bitumen attachment is 4' x 4'.
When using polyurethane adhesives or cold applied asphalt adhesive follow the adhesive manufacturer’s installation recommendation.
Vapor/Air Retarders
Moisture vapor tends to migrate from warmer to cooler areas. In building construction, vapor/air retarders are used to inhibit or block the passage of warm, moisture-laden air into walls or roofing assemblies. To determine whether a vapor/air retarder is necessary, calculations based on interior relative humidity, interior temperature, and the outside design temperature must be performed. Consult the NRCA Roofing Manual, Membrane Roof Systems 2007 for more information regarding vapor/air retarders and dew point calculations.
Special consideration should be given to construction-generated moisture as well. For example, consrtuction-generated moisture will be released when concrete floor slabs are placed after the roof has been installed, which can drive large quantities of moisture into the roof system. Therefore, Atlas is not responsible for damage to the insulation when exposed to construction-generated moisture. Refer to the NRCA Roofing Manual, Membrane Roof Systems 2007 for recommendations for the use of a vapor retarder when construction-generated moisture is present (5th Edition, Volume 3, p. 813). Refer to Atlas Technical Bulletin #00-01. Consult vapor/air retarder manufacturer for recommended applications and details.
Storage
Factory applied packaging is intended only for protection during transit. When stored outdoors or on the job site,the insulation should be stacked on pallets at least four inches above ground level and completely covered with a weatherproof covering such as a tarpaulin. The temporary factory-applied packaging should be slit or removed to prevent accumulation of condensation. Roof insulation which has become wet or damaged should be removed and replaced with solid, dry insulation.
Technical Assurance
Atlas provides a full-service Technical Department with a LEED Accredited Professional (AP), Registered Roof Consultant (RRC), Construction Documents Technologists (CDT) and Certified Construction Product Representatives (CCPR) on staff.
WARNING - DO NOT LEAVE EXPOSED
This product is a polyiso organic plastic foam and will burn if exposed to an ignition source of sufficient heat and intensity, or open flame, such as a welder’s torch. Like other organic materials, this product will release smoke if ignited. Do not apply flame directly to ACFoam® roof insulations. This product should be used only in strict accordance with Atlas recommended uses and application instructions.
Limitations of Liability
Other than the aforementioned representations and descriptions, Atlas Roofing Corporation (hereafter, “Seller”) makes no other representations or warranties as to the insulation sold herein. The Seller disclaims all other warranties, express or implied, including the warranty of merchantability and the warranty of fitness for a particular purpose. Seller does, however, have a limited warranty as to the LTTR-value of the insulation, the terms of which are available upon request from the Seller.
The Seller shall not be liable for any incidental or consequential damages including the cost of installation, removal, repair or replacement of this product. The Buyer’s remedies shall be limited exclusively to, at Seller’s option, the repayment of the purchase price or resupply of product manufactured by Atlas in a quantity equal to that of the nonconforming product. Atlas distributors, agents, salespersons or other independent representatives have no authority to waive or alter the above limitation of liability and remedies.
| Loading News Ticker... |
As a leader in the building products industry, Atlas Roofing Corporation is committed not only to compliance with the law relating to the environment, but also to the integration of sound environmental practices in its business decisions.
Need help with a Tapered Insulation project? Contact Atlas, we can assist with all your Tapered Insulation needs. This portal will give you valuable information about the products we offer, installation details, and our brand new on-line Quote Request!
| Tapered Polyiso Insulation Related Topics: |
| Tapered Insulation Related Products: |