Allison Bailes III

Building science consultant Allison Bailes shows how to add a new water-distribution manifold and smaller pipes to decrease the time it takes for hot water to reach faucets.

The net efficiency of a heat pump might be no better than a gas furnace but that doesn't mean they aren't a good option.

Building scientist Allison Bailes reviews the problems, myths, and best practices associated with fiberglass insulation.

Code requirements are always a compromise between what’s best and what’s practical.

There’s a lot more to an insulation's resistance to heat flow than the number on the package.

Garage ceiling joists present a challenge for creating a continuous air barrier; a little forethought makes it a lot easier.

When you have to make a choice between electricity or natural gas, it's clear that electricity is better for the environment and maybe for your checkbook, too.

Conventional heat pumps can provide pumped heat, supplementary heat, or emergency heat, depending on how cold it is outside.

Higher energy bills and lower comfort levels aren’t the worst effects of faulty ducts.

This wall design ensures good performance and solves the problems of inside and outside moisture.