Three Ways to Get the Answers You Need
Technical Coverage Map
Technical Services Specialist
Doug is a Sr. Technical Specialist for Johns Manville’s Insulation Systems group with over 20 years of experience in residential, commercial, industrial insulation materials and their applications. In his current role he consults with both internal and external customers to address product performance, compliance and specification questions. He is a licensed professional engineer in the state of Colorado and a LEED accredited professional.
Field Technical Representative
Jeff has shared his expertise in spray foam and fiber glass installation with clients all over the globe. Jeff holds an Electronic Engineering Technician degree from RCC College of Technology Toronto, Ontario. He has extensive knowledge in equipment maintenance, troubleshooting, applying spray products, and Canadian code requirements. Jeff has worked for a spray foam equipment manufacturer, a system house, and a distributor over the past 12 years.
Field Technical Representative
For Jacob, his experience is all in the numbers. With over 20 years of spray foam installation experience, he's sprayed two million square feet of roofing foam and over one million square feet of interior foam, from the U.S. to Southeast Asia and back. He is a certified building analyst, has earned OSHA's 30-hour certification and is dedicated to expanding his technical expertise. His patience and service mentality are a winning combination for JM's customers. With a love of teaching, he takes great pride in sharing his knowledge.
Field Technical Representative
Chris knows the ins and outs of JM spray foam insulation and focuses every day on teaching others how to properly prepare and install it. Prior to joining JM in 2012, he spent 17 years installing or managing the installation of spray foam. As part of JM’s technical representative team, he puts his expertise to work helping customers.
Senior Field Technical Representative
Having been an insulation contractor, user, developer and technical specialist, Wyatt brings a unique 360-degree understanding of the use and application of JM materials. Before joining JM in 2011, he was an owner/applicator of a spray foam insulation business, after graduating with a degree in Criminal Justice. He has also worked in research and development and technical support for Bayer Materials Science.
The Word is in on TechConnect
WHAT CUSTOMERS HAVE TO SAY
“We’ve been in the ‘spray foam’ business for approximately four years. Until yesterday, I thought we knew what we were doing. [JM Tech Rep] Chris Sasdelli came out to two jobsites with me yesterday and in 10 minutes, he was able to increase our productivity in the short term 25%, possibly 100% long term. He actually spent a few hours going over all our settings to spray Corbond as well as personal safety, truck and occupant safety and a great deal of information we didn’t have.”
-Jim Reilly, President, Reilly Insulation
Application of JM Corbond® Spray Foam products requires certification. Johns Manville's Spray Foam Applicator Certification is broken into four easy steps and is offered in both English and Spanish. To learn more or to get started, click on the link below.
How can one go about installing AP Foil?
In an exterior wall application, AP Foil is typically installed with the shiny foil side facing out. One exception is when the product is used with vinyl siding; then the white, non-reflective foil faces the vinyl. If installed adjacent to an ideal air space, the shiny foil side should face the air space to capture additional thermal performance. Boards should be installed horizontally with staggered vertical seams when possible.
How does someone go about installing vapor retarder?
On above grade exterior walls, in most cases, the vapor retarder is installed facing the interior or toward the conditioned living space. There are exceptions, so please contact your local building authority.
Is it possible to layer insulation to add R-Value?
Insulation can be layered to achieve a higher R-value; however, the total R-value may not be equivalent to the sum of the R-values. For fiberglass, R-value per inch drops with greater thickness. Ensure that all proper building practices and code requirements are met regarding total R-value and vapor retarder requirements. Please note, if the product is compressed, there will be a reduction in R-value.
Is insulation fire rated?
Insulation has a fire hazard classification for flame spread and smoke developed based on testing per ASTM E-84, not an hourly rating by itself. Hourly ratings are given to entire tested assemblies. UL and ULC have specifically tested entire assemblies that contain insulation to achieve a certain hourly rating.
Can kraft faced insulation be left exposed?
No. Kraft facing does not meet code for a material that can be left exposed. It must be installed behind gypsum wallboard.
If fiberglass or mineral wool becomes wet, can you still use it?
Prior to installation, fiberglass insulation should be kept clean and dry. Use of wet insulation depends on many factors: cleanliness of water, duration and extent of wetting, as well as ability to dry out and attain its original design thickness. The decision to keep the insulation is up to the building owner and the contractor. If insulation gets wet in a flood situation, it should be replaced.
Can AP Foil be left exposed on the interior?
No. AP Foil must be appropriately covered according to the code. However, CI MAX can be left exposed for interior applications.
Can R-panel or Nailboard be used in walls?
No. These products are intended to be used only in sealed roofing systems. Using them in any other application is at your own risk.
Is fiberglass or mineral wool better for fire protection?
Mineral wool has a melting point in excess of 2000 degrees Fahrenheit. Fiberglass has a melting point of around 1100 degrees Fahrenheit. However, both will perform well for fire resistance. Both products are Class A materials as defined in the building codes.
Is fiberglass or mineral wool better for sound?
Product density can lead to better acoustical performance. However, while mineral wool tends to be more dense than fiberglass when used at the same thickness in the same assembly, any difference in acoustical performance would be negligible.
Is Mineral wool formaldehyde-free?
No, there is a very small amount in the cured binder of our mineral wool products. However, JM’s mineral wool products are GREENGUARD certified by UL Environment.
What is the difference between closed-cell & open-cell spray foam?
Closed-cell foams are medium density, rigid spray polyurethane foam where the cells in the foam remain closed and filled with a blowing agent. They have higher R-values per given thickness and function as air barrier, water barrier, and vapor retarder. In contrast, open-cell foams are lower density foams where the cells open, release oxygen and fill with CO2. They have lower thermal performance per given thickness and require greater thicknesses to function as an air barrier.
When is a thermal barrier required versus ignition barriers?
A thermal barrier is required to separate unconditioned space from conditioned occupied space. This includes attics or crawl spaces used for storage. Prescriptively, this is a ½” of gypsum or a tested equivalent of an intumescent coating. Ignition barriers are required only in unoccupied attics or crawl spaces not used for storage, and accessed only to service equipment. Several prescriptive options are available to meet code, as well as tested intumescent coatings.