~SUSTAINABLE LIVING FOR CHALLENGING TIMES

[sumisu]

APPROXIMATE FROST PROTECTION OF DIFFERENT MATERIALS

(CONSERVATIVE)

Glass: 32/31 F (0/-1 C)
Plastic: 32/31 F (0/-1 C)
Sheet: 28/25 F (-2/-4 C)
Wall-O-Water 25 F (-4 C) or lower
Wall-O-Water with Sheet 18 F (-8 C) or lower
Light Blanket: 18 F (-8 C)
Heavy Blanket: 18 F or lower (-8 C)
Quilt: 18/15 F or lower (-8/-9 C)

Caution: A wet blanket on a windy night below freezing acts like an Air Conditioner. The wind evaporates the water taking heat with it.

Weight down your coverings if wind is expected.

If it snows on top of your coverings do not remove the snow. The 24 hours following a snow storm can be below freezing even during daylight. The snow acts as an insulator & will melt off when the temperatures recover.

North Tewksbury MA USA Zone 5b

By George Rebeiro Brooks