Frost On Underside Of Roof Sheathing

Combine 1 2 cup chlorine bleach with 1 gallon of water and use a sponge or cleaning brush to scrub the mold.

Frost on underside of roof sheathing.

The frost itself doesn t do any damage but once it melts things get wet which is when the damage. That excess moisture ends up as drops of condensation on the roof. Scosta steve costa february 20 2006 3 34pm 1 got a call to inspect an attic homeowner stated he hasn t gone up there in a long time when he was up there he noticed the underside of the roof sheathing had frost on it. Picture a cloud of moisture floating overhead between the rafters.

Frost itself doesn t do any damage but once it melts things get wet and then damage occurs. Melting frost can lead to deteriorated roof sheathing mold on the roof sheathing wet insulation and water stains on the ceilings. Water vapor is migrating upward and eventually filtering into the attic. Don t rinse or wipe the bleach solution from the sheathing after cleaning.

Can sun get to the roof you will have either frost or water collecting. This latter phenomenon occurs when the house is too humid and the warm moist air seeps into the attic where it condenses and freezes on cold attic areas. He recently had a new heat pump and aprilaire humidifier installed in basement. Frost comes from air leaks.

Frost on underside of roof sheathing it s more likely a vapor problem than a liquid water problem. Warm wet air rises and meets the cold roof and cools. When it reaches the cold surface of the roof sheathing and framing it turns to frost. A little bit of frost forming is not unusual after really low nighttime temperatures and it isn t a huge problem if it is able to melt and evaporate so that the wood can dry.

When the moisture gets into the attic it condenses on the roof sheathing in the form of frost. The problems you pointed out are certainly real and need repair but getting the underside of the decking frosted requires vapor. Essentially condensation occurs at night when the temperature inside a building is warmer than outside. After several years of this there may be.

Depending on the temperature and the insolation ie. Frost and ice forms in attics when warm humid air accumulates and condenses on the underside of your roof sheathing. You definitely don t want frost in your attic.