black spots on the roof. can you tell me what is the cause of this? have lived in this house 12 years and have had no problems. what can you do to clean this?
This type of staining (algae as the other posters have said) will usually only happen on the North facing surface of the roof. Same with condensation on your car glass. Suprisingly, the North facing ... read more
In most homes, the neccesity of new windows does not usually crack the top 3 in terms of energy efficiency improvements.
You can usually get more efficiency mileage and bang for your remodeling dollar ... read more