Balsa wood is pretty good and can be sanded down to give a nice smooth surface if you want to cover it in this sheet. Personally I use Kaowool, a mineral-based felt type material that is designed for the job. alan@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx www.alanstepney.info Model Engineering, Steam Engine, and Railway technical pages. ----- Original Message ----- From: "JESSE LIVINGSTON" <fernj1@xxxxxxxxxxxxx> To: <modeleng@xxxxxxxxxxxxx> Sent: Thursday, December 16, 2004 1:45 AM Subject: [modeleng] Re: Boiler insulation Al, Someone did some tests that were on the Chaski list a couple of years ago and claimed that lagging did not help measurably on our small stuff. Why don't you do as I did with the Newbie boiler and use narrow 1/8" thick wood strips for insulation/lagging? Looks pretty on an upright boiler and keeps you from burning your hand if you accidently touch it. Jesse MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line. MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.