How Much Roof Insulation Is Too Much

You will need a higher r value of insulation if you live in the northeast than if you live in southern california.

How much roof insulation is too much. Sometimes people can get a little over ambitious and install far more insulation than is necessary or even effective. This wall for a passive house in seattle will hold about a foot of insulation. Nola sweats posted in energy efficiency and durability on september 26 2019 05 10pm i m in climate zone 2a where the general code is r 38 for ceilings but many state local codes accept r 20 spray foam in a sealed attic as acceptable based on performance. How much insulation should you install.

Most leading energy experts today recommend installing a lot more insulation than is common practice. The passive house standard requires a peak heating load of no more than 3 17 btu hr per sq. How much insulation is too much. There comes a point where too much insulation starts to have a negative effect financially environmentally and in terms of the longevity of your home.

I realize the focus was on too much insulation and found it very interesting and instructive that for example increasing roof r from 60 to 90 yielded a measly 89 kwh savings. Without proper ventilation a home can build up too much moisture especially in the attic warm air rises which can cause mold problems and overall lower indoor air quality. Fortunately insulation fixation is a monkey not many people have on their backs. Where you live different climates require different insulation r values.

The energy savings that would flow from hitting this target are too low to justify the extremely high cost of the insulation needed to achieve it. This is oddly enough a question that needs to be addressed also is it even possible to install too much insulation in a home. When it comes to insulating your homes attic there are usually no safety concerns regarding having too much. Even with grid supplied resistance heating that s perhaps 10 15.

So yes it is possible to over insulate your house. Most leading energy experts today recommend installing a lot more insulation than is common practice. How much insulation is too much. This is not to say that if you have mold in your home too much insulation is the culprit.