On Fri, 7 Dec 2007 03:57:24 -0800 (PST), marson
wrote:

-snip-
The low tech way is to wait for a very cold day and feel around
with your hands. The high tech way is to rent or hire a thermal
imaging camera.

Or for an in-between option a infrared-no touch- digital thermometer.
0-220 or so models are available for $10.

I'd spend $30-40 and get one that has a greater range. See ebay or
froogle for the hundreds of models.

First place I'd check is where the sill meets the foundation.

My basement was drafty too because it was
uninsulated concrete block.

Cold, yes, but unless the mortar fell out from between the blocks, not
drafty.

Jim