Mike Lamb Posted May 28, 2016 Report Share Posted May 28, 2016 This is the first time I have ever seen any scorching of any material in touch with a B-vent. Although the real culprit here is probably having a connection at the floor penetration which is a no-no. Click to Enlarge 58.74 KB Quote Link to comment Share on other sites More sharing options...
Marc Posted May 28, 2016 Report Share Posted May 28, 2016 There should be a heat shield at the floor diaphragm. Marc Quote Link to comment Share on other sites More sharing options...
David Meiland Posted May 28, 2016 Report Share Posted May 28, 2016 People will squirt that foam on anything. Quote Link to comment Share on other sites More sharing options...
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