Attic moisture and your climate
Natural attic ventilation, with 1 ft2 (0.09 m2) of vent opening for every 300 ft2 (28 m2) of attic area, was proven to effectively prevent condensation in attics and as a result the 1:300 rule was born. The outdoor temperature in the experiment was –10°F (–23°C) and indoor conditions were 70°F (21°C) and 40% relative humidity. But these conditions are typical to cold inland climates only. Chances are you do not live in a cold inland climate and, as a result, the 1:300 rule does not apply anymore.
Why and how to install an attic vent
Ventilating your attic can benefit you in a number of ways by preventing ice dams on your roof and decreasing your heating and cooling energy costs. In addition, your will prevent costly repair bills by preventing moisture build up in your attic which affects the insulation and in the end the lifetime of your shingles. Typically, the more air flow in from outside the better but not in all cases!
How to Fix a Water Stain on a Ceiling
Have you noticed a funny stain on your ceiling? If this happens at your upper level, you can be sure that you roof is leaking or your do not have adequate ventilation in your attic. Otherwise you have to check you bathrooms at the upper for any water leaks. Here is how to fix a water stain and some important tips to prevent them.
How to Prevent Icicles and Ice Dams on Roofs
You noticed that icicles form at the edge of your roof, but your neighbors do not have any? This is a sure sign that you have an attic insulation and ventilation problem. When snow accumulates on the roof, here is what it can happen to it: (1) evaporate from the action of the sun, (2) melt if the outside temperature is above the freezing point, enter the gutters and flow to the ground or …
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