What stands out is the high relative humidity inside the house.
Too much humidity in attic.
Seal around the chimney and all penetrations including the access door.
Cold outdoor temperatures especially below freezing can wear on your furnace.
Quelch the heat wave.
Check for negative pressure.
If left untreated it can damage critical structural elements of the home such as the trusses and rafters ruin insulation damage any stored belongings and lead to the formation of potentially toxic black mold.
At 48 52 you re at the upper tier of the recommended 35 50 during heating season.
As with pretty much all home improvement projects your contractor might.
If you raise the attic temperature the rh in both places would be the same.
Condensation in the attic is a serious problem that must be addressed by homeowners.
And when you put too many products on your roof that s improper ventilation.
When the air is warm it holds a lot of moisture so the relative humidity was low and there was no moisture problem.
Roof ventilation keeps the air moving and stops mold from growing but too much ventilation can be just as bad as having none.
So they equalize pretty quickly.
In theory if you install a small exhaust fan in the gable wall of an unvented attic along with a passive duct or grille that allows conditioned air from the floor below to enter the attic as makeup air the humid air in the attic will be exhausted and will be replaced with less humid air from the home.
How to manage humidity in your spray foamed attic 1.
Do not use mechanical means electric attic fans.
Make sure your attic is properly sealed.
What happens is people put too many products on their roof.
All it takes to grow mold in your attic is stagnant humid air.
By adding moisture to the lower floor you increase the partial pressure of the water vapor which pushes it to areas of lower vapor pressure like the attic.
The solution is to air seal between the attic and the heated space below.
Hot summer weather poses the opposite problem for maintaining recommended attic temperatures.
Venting a homes attic is a very important best building practices will say 50 at the ridge and 50 at the soffits unobstructed.
If you stop the air leaks you will solve the problem and save lots of energy.
During the winter months the recommended relative humidity inside a house is anywhere between 30 50 percent.
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.
If there is excessive moisture accumulation in your attic it will condense on cold areas mainly on the underside of your roof deck.
Ideal attic temperature and humidity settings cold outdoor temperatures affect attics.
