Hi JC,
Garden
By trying to fix the drainage problem they are admitting that there is a problem. What have they been doing to try to fix it? Either new topsoil or a soakway is required. You have probably seen this link:
http://www.diydata.com/problem/drainage/drainage.htm
It might be worth contacting the owners of this site, as they have had problems with drainage in their new Persimmon Home as you can see.
http://www.snagging.org/viewlink-31.html
[img:eea69b9731]http://users.sagehost.co.uk/asylum/img3.gif[/img:eea69b9731]
Windows
Not exactly sure what you mean, sounds dodgy though. Trickle vents can normally be opened and closed, so if they were open and causing a draught you should be able to close them and stop the draught.
Hope this is helpful
Tony