Originally Posted by floyd
Whether ruined or not, the reflextix/ratur combination used in a Scamp
, certainly provides one of the most effective, attractive, and comfortable interior linings in the industry. If there is no "real" benefit, the benefits must only be "fantastic".
I know, I know "Bumblebees can't fly"
Having disassembled a few interiors I can tell you that the glue is not a continuous coating but rather a stringy application.
Also there certainly is an advantage to the reflextix under the ratfur, both in its ability to block (reflect?) light and heat.
Boat's hulls spend time in water. Boat"s hulls (by necessity)are not so thin as to allow light tranfer. Ever been inside a single hulled fiberglass trailer with no lining on a sunny day?
Yes I have been in several fiberglass RVs with no lining. You can indeed see light through them. You can also see light through the hull of a McGregor sailboat
They are made for towing with a trailer. Fiberglass boats are not all created with thick hulls. Generalizations are rarely presenting the whole picture.
Some people test the effectiveness of the insulation by doing a touch test on the inside surface of the fabric wall covering. Touching fabric surfaces with your fingers is not an effective way to measure ambient air temperatures or measure R value.
As to the reflextic reflecting light. That is not how radiant heat barriers work, it is not the light, it is the heat that needs to be reflected. It could be in a totally dark space with a heat source in it and it would still work.
From the department of energy: "To be effective, the reflective surface must face an air space." That air space needs to be at least 1" wide for it to be effective.
Reflextic is a 1/4" thick so that is the total air space inside a sandwich of fiberglass and carpet both of which are right against the Reflextic. While there is reflective Mylar on top of the bubbles the reflective ability generated by the Mylar surface inside of that air space is negated by the plastic material which is not completely transparent the way a sheet of glass would be, that plastic is bonded to the Mylar. It just so happens that at the moment I have a scrap piece of Reflextic that has no coating on one side as it was pulled off by some tape. I just shined a strong LED light at it. There is only a very muted reflection from the surface of the Mylar when I shine it through the un-coated bubbles. What is required for that air space is reflective material facing towards the air space. You are not getting that within the Reflextic, as there is not significant reflective ability within that 1/4" space. You are only getting radiant heat reflection from the outside surfaces.
No doubt about it it Reflextic does a good job of radiant heat reflection. But putting Reflextic against the surface of a fiberglass shell on one side and against the fabric on the other side is not giving you an air space.