/sigh
So your solution is what? Fit new windows? Dig off the reveals to squeeze some foam in and re-plaster etc? Fit new DG units?
One or a combination of the above may work. They may not. But they are all more expensive than fitting a couple of vents.
Buildings still need to breathe even in 2014. Though the products/technology may have evolved, the physics for allowing that to happen has not.
So your solution is what? Fit new windows? Dig off the reveals to squeeze some foam in and re-plaster etc? Fit new DG units?
One or a combination of the above may work. They may not. But they are all more expensive than fitting a couple of vents.
Buildings still need to breathe even in 2014. Though the products/technology may have evolved, the physics for allowing that to happen has not.