我们想把安装PIV单位在1950年代的阁楼3床半独立房屋,帮助高湿度(通常在70年代高甚至在夏季),冷凝和模具斑点和斑块墙壁和木制家具。屋顶与石灰砂浆和underfelt原始瓷砖。似乎有轻微下垂。有绝缘但我不能告诉如果是推到屋檐下。奇怪的是,一个正方形区域的绝缘高于浴室非常黑暗/黑色绝缘看起来就像一大块塞在一个正方形区域(两个砖块的大小)在墙上山墙屋顶。呈现在外面。所以我猜是绝缘的家伙塞的材料来阻挡寒冷吗?我们注意到去年排水沟(筋膜)背后的木头是腐烂的地方和计划所取代。我的问题是,我在检查相对湿度在阁楼湿度计可以肯定的是它支付PIV前通风良好,但湿度似乎有20 - 30百分比高于外部湿度。这游戏我,我担心是不正确的,需要整理之前PIV系统安装吗? Today was a cold, breezy, relatively dry day, at one point the readings were 12 degrees and 56 percent humidity outside, 10 degrees and 84 percent humidity in loft, and 20-21 degrees and 56-62 percent humidity in the house. Is the high humidity in loft normal or does it indicate a problem? Should we install roof vents, what type and how many, in the lime rendered roof? Could the rotting fascias be causing the humidity? And is the black insulation black because it's an area of air leak (possibly humid air somehow from the bathroom?) Thankyou for any help