Protocells: The future of building

Rachel Armstrong describes how new processes of using metabolic materials and new types of materials -- based on living things -- to replace today's reliance on Victorian building technologies that are not sustainable.

How is this being used now? Scientists are investigating whether protocells can grow limestone and save Venice, Italy.

Practical advice on building or remodeling a home

Tips for first-time homebuyers

Insulate a crawl space?

Q. Should I invest in insulating a crawl space? What is the best way to go about insulating this type of space?

A. Yes if the area above the crawlspace is a conditioned space, or heated and cooled, you may recognize a considerable energy savings by insulating a crawlspace. You may install Fiberglas batting or spray foam between the joists under the floor to insulate a crawl space.

Homebuyer tax credit extended and expanded

Insulate your home, save money with paint

Q. Can you really cut energy costs by using insulating paint?

A. While it’s impossible for PBA to verify one product’s effectiveness, insulating paints are not recognized by the national green building standards of the National Association of Home Builders or other such industry standards. Many other alternatives for sealing leaks in your home’s exterior and improving its insulation have proven their effectiveness.

Congress extends homebuyer tax credit

Congress has voted to extend the $8,000 first-time homebuyer tax credit for 20 weeks. The bill, currently awaiting President Obama's approval, also provides a tax credit of $6,5000 for current homeowners buying a new home.