Here are links to construction-related newsgroups that hopefully will give you the answers to any questions concerning construction activities.

alt.architecture
alt.building architecture
alt.building.construction
alt.building.contractors
alt.building.engineering
alt.building.environment
alt.building.interior-design
alt.building.jobs
alt.building.law
alt.building.manufacturing
alt.building.recycle
alt.construction
alt.home.repair
can.construction
pdaxs.jobs.construction