why is it especially important to have high “r-value” materials in ceilings?
Question by betsy: why is it especially important to have high “r-value” materials in ceilings?
1) explain and answer my questions…2) can u explain to me what a “r-value” is?
Best answer:
Answer by bill v
“R” value is the resistance to loss of heat or cool air. The higher the R value, the less your house will cost to heat or cool. Usually about R30-40 is good for an attic.
Know better? Leave your own answer in the comments!
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Heat goes up, mainly. Therefore, it is especially important to have high r-value materials in your ceiling.
R value is the grade given to insulation based on how well it does it’s job. I think the first answer is more technically correct than mine…suffice to say that the higher the R value, the better the insulation helps with climate control.
I think in ceilings this would be more important when you are trying to HEAT the house…because heat rises. This will happen regardless of where or how the heat is introduced to the area, it will naturally head up. (But this is also why radiant flooring, floor vents, etc makes so much sense, to start as low as possible and let you enjoy the heat AS it rises.) If you don’t have good insulation it will escape through the ceiling, and ultimately through the roof. If the heat is not permitted to escape, it can be recirculated with a ceiling fan back down to where the people are trying to stay warm.
Your ceiling has only 1/2 inch dry wall on it without any insulation. In the summer attic temps go well into the 100′s and in the winter stay in the 40 to 50 range due to the ventilation from the eave of the house. Without insulation you would gain heat in the summer and lose heat in the winter. Add enough insulation to cover the ceiling joists up to r 30 to 40.
better insulation
R value is the amount of resistance to “thermal conductivity”. How much heat moves through it. In the winter time heat rises and is lost upwards. In the summer time the attic space heats up due to radiant heating(The sun beatting down on it). Therefore more attic insulation. AKA ceiling insulation.