I have a single-story house (from the 70s) with a cold attic. In the hall, I have cut out holes and installed protective cups (Lumiance) to be able to have spotlights. Now, I am putting down tongue and groove boards in the attic to store some items.
My question is this. I have 150mm insulation in the attic. I have used 95mm studs to add an additional 95mm insulation before laying the tongue and groove boards. Now, I have reached one of my cups and here is my dilemma which no one at any building supply store has been able to answer. My cup protrudes about 130mm. That means I have about 95mm to my floor IF I build over it. My question is, can I build the floor over the cup, or should I leave an open hole in the floor of 50x50cm to allow for more insulation above the cup? If I lay the floor over it, there will only be about 95mm of insulation between the cup and my tongue and groove boards. My concern is, will the heat from the cup penetrate through the insulation to the cold tongue and groove flooring (heating it up in patches) and cause condensation under the boards and insulation in winter? The cup will surely get warm and 95mm insulation isn't much. Or do I NEED to cut a hole about 10cm larger around the cup and add, for example, an additional 95mm insulation to prevent condensation under the boards?
VERY grateful for any answers
