Is pipe insulation flammable?

Friday, December 7, 2018

The round foam pipe insulation with a slit on one side that is used most often in residential applications is polyethylene or neoprene, both of which are classified as combustible. Some formulations of the material may self-extinguish after a flame is removed from it, but that still puts it in the combustible category, which the code requires to be at least 6-inches away from a single-wall flue connector or 1-inch away from a Type-B connector above a gas furnace or water heater, unless otherwise indicated on the manufacturer’s data plate. 

    So, the insulation on the suction line coming out of an evaporator coil unit in photo above definitely should not be touching the single-wall flue connector.

• • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • 

Here’s links to a collection of our other blog posts about INSULATION: 

What are the common problems with attic insulation?

Why is vermiculite attic insulation a problem for both buyers and sellers of a home? 

 Why is the garage so hot in the summer?

How can I tell if a house has insulation? 

Why is spray foam used for attic insulation?

Should I wrap the water heater with an insulation blanket? 

Should I put some more insulation in the attic?

• What does the "R-Value" of home insulation mean? 

    Also, visit our HEATING AND AIR CONDITIONINGWATER HEATERS and INSULATION pages for other related blog posts on this subject, or go to the INDEX for a complete listing of all our articles.

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