We want to set up some tests that will be exposed to the weather on realistic roofing samples for a decent period of time.
- We should be able to test the samples and return them to the mounting point, so we can monitor for performance degradation over time.
- Asphalt shingles and corrogated tin are the two roofing materials
- The size should be 20 inches by 20 inches to fit into the larger testing chamber, so we can test every few weeks with the same chamber
- The mounting point should be fully exposed to UV light and the weather including hail; a 8 x 4 sheet of plywood on saw horses is one way
- We will have control samples untreated
- We can use the Coolrays film on a sample of tin, but that film most likely won’t stick to an asphalt shingle - maybe we can try that anyway
- We should make paint using the acrylic / acetone / water as in NightHawkInLight’s original recipe; to make this stick to metal, we know we have to paint the metal first
- We should make a paint using a polyurathane clear coat with the powder in it
- We should make a paint using “water glass” or sodium silicate and the powder
The 20 inch squares should then be mounted in such a way as we can remove them to test and replace them, but they won’t blow off – perhaps screws with big washers on the edges of the material ?
Testing matrix:
| Column 1 | Column 2 | Column 3 | Column 4 |
|---|---|---|---|
| Paint | Asphalt Shingle | Corrogated Tin | |
| Control / no treatment | X | X | |
| Acrylic / Acetone / Water & Powder | Apply directly | Paint with a bonding paint first | |
| UV resistent Polyurethane Clearcoat & Powder | Apply directly | Test a small piece to see if bonding paint is needed | |
| Water Glass ( Sodium Silicate ) & Powder | Apply directly | Apply Directly | |
The 4 x 2 rows should fit with some spacing on a single 4ft x 8ft sheet of plywood. We will tilt it at a standard roof pitch, facing south.