The numbers are based on your house s location and climate zone.
Houses without attics.
Unlike today s airtight homes many old houses have a natural ventilation system.
As a certified licensed home inspector it is not correct to say too much ventilation is bad for an attic unless rain moisture is getting in.
Check for rebates and credits in your region.
Do not use mechanical means electric attic fans.
Most federal tax credits for weatherizing your house and boosting its energy efficiency expired in 2011.
Attic ventilation keeps your house cooler in summer and it prevents moisture from building up in winter and ruining your roof framing and insulation.
There are homes designed without attics and there are homeowners who wish to raise their ceilings but there are energy efficiency concerns with having no attic.
They breathe through air leaks and houses built before the 1960s were usually not well insulated.
How to vent an attic with no eaves.
Classic older homes may radiate beauty and charm but they are often uncomfortably drafty especially during cold months.