康涅狄格州屋顶的底面是否会喷开好/坏？
I am wondering if open-cell foam (specifically Icynene) is OK to spray on the underside of a roof deck of an unfinished attic of a 1920’s home in Connecticut.
The attic is a walk-up attic from stairs in a bedroom. The house has a basement which is where the boiler is located and there is no air conditioning. The walls have all been done with the closed-cell pour formula from Icynene.
I am asking this question because the attic has been sprayed already and I have had problems ever since. I have had a lot of moisture sitting on the surface of the Icynene in the attic in the summertime as well as on the brick of the chimney that runs up through the attic.
I have cedar shakes for siding on my house and have also noticed that the paint has started to peel off ever since the insulation was done on the house and have also had woodpeckers attacking the side of my house now. I don’t know if any of this is related or not but any help would be much appreciated
GBA Detail Library
A collection of one thousand construction details organized by climate and house part
Replies
Josh,
如果喷雾泡沫安装程序做得很好，那么没有任何理由不能在康涅狄格州的屋顶护套的底面安装喷雾泡沫。
In your climate zone, it's a good idea to spray the underside of the cured foam with a vapor-retarder paint, to prevent moisture accumulation in your roof sheathing. Most building codes also require that the cured foam be protected with a thermal barrier (for example, gypsum drywall) for fire safety.
Ideally, the foam should be thick enough to provide at least the minimum R-value required by the building code. The 2009 IRC requires a minimum of R-38 insulation for ceilings in your climate zone; that's about 10 1/4 inches of open-cell spray foam.
If you are seeing moisture condensing on surfaces in your attic during the summer, the interior of your house probably has elevated humidity. You should investigate what the source of the moisture is. Typically a basement or crawl space may be responsible. The solution to this problem may require modifications to your basement or crawl space. You may also need to operate a dehumidifier or air conditioner during the summer.
It's certainly possible that adding insulation to your walls will shorten the life of paint on your siding. This is an unfortunate side effect of some insulation jobs. One possible solution is to install楔子.
乔什，看水分来源，开始使用湿istat。阅读高水分问题来源和解决方案。人，淋浴，大量室内植物，湿地下室，高湿度地下室.....等。滴水的凝结远远超出了正常状态。