On Dec 28, 1:06*am, TheOldFellow wrote:
How do people go about this? There are the obvious windows and doors,
and *maybe floorboards, but what about tracking down the others?

I remember watching a "This Old House" once where the contractor
pressurised the house with a fan - sealed over the front door frame -
and then, with the increased pressure driving the airflow, set off a
smoke generator and watched where the smoke went.

R.

A pro Blower Door Test is best. The guy doing mine had a good unit
that measured air exchanges per day and what they should be. You can
use a fan in a window but a pro test is not expensive.