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5929Re: [midatlanticretro] Important museum update

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  • William Donzelli
    Aug 6, 2007
      > A blowtorch, as suggested previously, has a much higher temp than a heatgun, >1000F
      > At least with a heatgun, you can use the low setting , usually 700/800F
      > Even a heatgun can cause burn spots in wood if not used correctly.
      > In combination with the large surface area of the sheet metal doorframe creates a heatsink which disperses the heat.

      Really, using a heatgun on a metal doorframe with contact to wood
      within the wall is REALLY DANGEROUS. Yes, the metal sinks the heat.
      Where? Unless you rip the wall open, you do not know. It might sink it
      to a select few places with dry old wood, or some of the awful
      flammable junk that used to pass for insulation. The thermal
      resistance of a metal to wood joint is much lower that that of the
      hot-air to wood (or hot-air to metal, for that matter). It is easy to
      get carried away with a hot-air gun (the temperature controls on those
      things are not precise, as well), and you really might not know about
      charring wood within the wall until too late.

      As for stripping around glass on a window? Remove the glass. The putty
      holding the pane is probably in need a replacement anyway.

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