I have a couple questions for the experts on radiant barriers.
1. Are they worth the expense in reducing utility bills in a hot
2. Is there a preference between the paint and a physical barrier
stapled to the rafters.
It seems that using a physical barrier on the rafters would block
Suggestions please. Thanks in advance.
I've never seen hard, actual data that proves they are, but the
consensus does appear to be that they work and are worth the cost.
The material is maybe $100-200 for a typical attic, which you should
recover relatively quickly if you use AC in an area that gets
I've only seen either the stapled type or else the similar type that
is already applied to sheathing. Never knew paint type existed. If
you have 2 people, IMO, it's going to be a lot easier, cleaner, faster
You leave an open area of a foot or so at the bottom and the top.
This leaves plenty of space for air to enter at the bottom and exit at
the top, preferably through a ridge vent. If you don't have a ridge
vent, then I would think it could impact air flow through a gable
I agree with trader and suspect that the physical barriers would work better
since they would create a separate air space as well and that would increase
the insulation. Remember you want to keep the shinny side clean.
Yes, it need to be the shiny side. A radiant barrier is a shiny
surface with an air gap next to it (so there is no conduction). If
the shiny surface gets dusty, then you no longer have a radiant
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