Blog

Attics, Moisture, and Mold: Part 2

attic mold

In part 1 of our “Attics, Moisture, and Mold” blog series, our roofing installation company shed some light on moisture conditions, how mold grows, and what you can do to reduce the moisture in your home. In part 2, we’ll continue our discussion:

Humidity vs. Moisture

You’ve probably heard both of these terms used to describe the presence of water vapor, so what’s the difference? Moisture usually refers to water vapor that’s found on a surface, while humidity usually refers to water vapor that’s found in the air. When you listen to the weather forecast, you’ll hear the expert use the term “humid” to describe a warm, sticky day.

Relative Humidity

Though relative humidity is another measurement of humidity, the two terms aren’t interchangeable. Relative humidity (abbreviated RH) is expressed in a percentage, and refers to the amount of atmospheric moisture present relative to the amount that would be present if the air were saturated. Humidity, also called “absolute humidity (AH)” refers to the amount of atmospheric moisture present.

For example: If one day, the dew point is 34 degrees Fahrenheit and the temperature is 38 degrees Fahrenheit, we would get a high RH value and a low AH value. If another day, the dew point is 63 degrees and the temperature is 85 degrees, we would get a low RH value, but a high AH value.

The Effects of Seasonal Changes

When it comes to moisture, the seasons have an effect on its presence. When the weather gets warmer, humidity causes your attic to collect moisture and promotes the growth of mold. The highest RH level that building codes and manufacturers recommend is 40%. If your home is over that during the summertime, it could overwhelm your attic ventilation system and increase your attic moisture.

P.J. Fitzpatrick, Inc.

21 Industrial Blvd
New Castle, DE 19720

  • NJ Lic. #13VH10727200
  • DE Lic. #2009603070
  • PA Lic. #PA011323
  • MD Lic. #105494

© 2020 P.J. Fitzpatrick, Inc.

Website by the Prager Microsystems, Inc. Digital Marketing Agency

Live Chat With Us
[gravityform id="20" title="false" description="false"]
<div class='gf_browser_unknown gform_wrapper' id='gform_wrapper_20' ><form method='post' enctype='multipart/form-data' id='gform_20' action='/blog/attic-ventilation/attics-moisture-and-mold-part-2/'> <div class='gform_body'><ul id='gform_fields_20' class='gform_fields top_label form_sublabel_below description_below'><li id='field_20_1' class='gfield gfield_contains_required field_sublabel_below field_description_below gfield_visibility_visible' ><label class='gfield_label' for='input_20_1' >Your Name:<span class='gfield_required'>*</span></label><div class='ginput_container ginput_container_text'><input name='input_1' id='input_20_1' type='text' value='' class='medium' aria-required="true" aria-invalid="false" /></div></li><li id='field_20_4' class='gfield gfield_contains_required field_sublabel_below field_description_below gfield_visibility_visible' ><label class='gfield_label' for='input_20_4' >Phone Number:<span class='gfield_required'>*</span></label><div class='ginput_container ginput_container_phone'><input name='input_4' id='input_20_4' type='text' value='' class='medium' aria-required="true" aria-invalid="false" /></div></li> </ul></div> <div class='gform_footer top_label'> <input type='submit' id='gform_submit_button_20' class='gform_button button' value='Submit' onclick='if(window["gf_submitting_20"]){return false;} window["gf_submitting_20"]=true; ' onkeypress='if( event.keyCode == 13 ){ if(window["gf_submitting_20"]){return false;} window["gf_submitting_20"]=true; jQuery("#gform_20").trigger("submit",[true]); }' /> <input type='hidden' class='gform_hidden' name='is_submit_20' value='1' /> <input type='hidden' class='gform_hidden' name='gform_submit' value='20' /> <input type='hidden' class='gform_hidden' name='gform_unique_id' value='' /> <input type='hidden' class='gform_hidden' name='state_20' value='WyJbXSIsIjExY2Q2ODU0YWI0Y2RiZGJiMzBhMmEyNzEwY2IwZDM1Il0=' /> <input type='hidden' class='gform_hidden' name='gform_target_page_number_20' id='gform_target_page_number_20' value='0' /> <input type='hidden' class='gform_hidden' name='gform_source_page_number_20' id='gform_source_page_number_20' value='1' /> <input type='hidden' name='gform_field_values' value='' /> </div> </form> </div><script type='text/javascript'> jQuery(document).bind('gform_post_render', function(event, formId, currentPage){if(formId == 20) {jQuery('#input_20_4').mask('(999) 999-9999').bind('keypress', function(e){if(e.which == 13){jQuery(this).blur();} } );} } );jQuery(document).bind('gform_post_conditional_logic', function(event, formId, fields, isInit){} );</script><script type='text/javascript'> jQuery(document).ready(function(){jQuery(document).trigger('gform_post_render', [20, 1]) } ); </script>