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Crawlspace Venting in Point Pleasant & Surrounding Jersey Shore Towns

There are basically three types of venting techniques used today in crawlspaces around America and all three are used in all regions of the country. Yet, we all know that there are climate differences in the various regions of the United States and these differences could affect the efficiency and usefulness of a particular type of vent during cold, warm or hot periods.

The type of Vents are:

(Least expensive) A Passive Manual Vent  -  Must be manually opened or closed
(The traditional) A Temperature Vent (Temp Vent) – A sensor opens the vent at a set temperature and closes it at a set temperature. Generally, the vents close at 40 degrees and will gradually start to open above that until completely open at 70 degrees.
(Highly supported by  Environmental experts) An Automatic, Humastatically Controlled Vent – A vent that reads and monitors both temperature and humidity levels inside the crawlspace and at the exterior of the home. The vents will only open when the relative humidity levels are less than the interior humidity levels and low enough to avoid the risk of actually adding humidity to your crawlspace and creating additional moisture conditions and an unhealthy crawlspace environment.

Did You Know That:  In New Jersey, on average, we will experience 209 days during which outdoor relative humidity will be higher then 65% for the majority of the day. Mold growth is promoted anytime relative humidity rises above 55% in your crawlspace. Thus, if you replace the air in your crawlspace (through passive or traditional temp vents) with outdoor air that is above the 65% relative humidity level you are creating a bigger problem than if you had no venting at all. You could actually be raising the relative humidity levels in your crawlspace to unhealthy levels.

YOUR  CRAWLSPACE  TEMP  VENT  COULD  BE
DOING  MORE  HARM  THAN  GOOD

The North Carolina Study  -    A study was conducted in North Carolina commencing in 2005 under the supervision of the US Environmental Protection Agency. This study involved 12 homes constructed for the Homes For Humanity program. Four of the homes had traditional temp vents and the other eight homes had their vents completely sealed off. All of the homes were built the same and placed over the same type of crawlspaces.

After several years of observations, what was discovered was that the homes with traditional vents actually had consistently higher relative humidity levels and potentially destructive levels, in their crawlspaces than did the homes that had the vents closed off.  What was concluded was that to vent just for the sake of venting is not a sound or advisable building technique. While venting is still useful and, for the most part, recommended by environmental experts, venting should be scientifically controlled based upon relative humidity levels and not just temperature.

While some professionals in the building industry promote the theory that no venting is better than poor venting, we at Jersey Shore Home Moisture Management believe that the correct science supports venting at the proper time and under the proper conditions.

We feel that an exchange of air in your crawlspace and the circulation of your indoor air, when done in coordination with your crawlspaces relative humidity levels, will still provide you with the best possible protection against unhealthy conditions establishing a home in your crawlspace.

WHAT CAN YOU DO NOW!  

  • Have Your Vents Inspected To Insure Proper Operation.
  • If you have temp vents, make sure they are tightly closed during any periods of high relative humidity.
  •  Consider Replacing Old Temp Vents With The Latest Humastatically Controlled Vents.
  •  If the dirt in your crawlspace is already covered with a vapor barrier, have it checked to make sure it is not torn dislodged in places or no longer properly secured.
  • If you don't already have a vapor barrier covering the dirt floor of you crawlspace, have Jersey Shore Home Moisture Management professionally install a strong 12 Mil vapor barrier to protect your home and act as the first defense against unwanted moisture build-up and the subsequent unhealthy environmental conditions it creates.

    Venting Page
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The “Venting” Debate

 

There are basically three types of venting techniques used today in crawlspaces around America and all three are used in all regions of the country. Yet, we all know that there are climate differences in the various regions of the United States and these differences could affect the efficiency and usefulness of a particular type of vent during cold, warm or hot periods.

 

The type of Vents are:

 

   (Least expensive)           A Passive Manual Vent  -  Must be manually opened or closed

 

  ( The traditional )            A Temperature Vent (Temp Vent) – A sensor opens the vent at

                                            a set temperature and closes it at a set temperature. Generally

                                            the vents open at 72 degrees F and close at 48 degrees F.

 

 (Highly supported by        An Automatic, Humastatically Controlled Vent – A vent that

  Environmental experts)    reads and monitors both temperature and humidity levels

                                            inside the crawlspace and at the exterior of the home. The

                                            vents will only open when the relative humidity levels are less

                                            than the interior humidity levels and low enough to avoid the

                                            risk of actually adding humidity to your crawlspace and

                                            creating additional moisture conditions and an unhealthy

                                            crawlspace environment.

 

 

Did You Know That:  In New Jersey, on average, we will experience 171 days during which outdoor relative humidity will be higher then 65%. Mold growth is promoted anytime relative humidity rises above 55% in your crawlspace. Thus, if you replace the air in your crawlspace (through passive or traditional temp vents) with outdoor air that is above the 65% relative humidity level you are creating a bigger problem than if you had no venting at all. You could actually be raising the relative humidity levels in your crawlspace to unhealthy levels.

 

 

 

                YOUR  CRAWLSPACE  TEMP  VENT  COULD  BE

                          DOING  MORE  HARM  THAN  GOOD

 

 

 

 

 

 

The North Carolina Study  -    A study was conducted in North Carolina commencing in 2005 under the supervision of the US Environmental Protection Agency. This study involved 12 homes constructed for the Homes For Humanity program. Four of the homes had traditional temp vents and the other eight homes had their vents completely sealed off. All of the homes were built the same and placed over the same type of crawlspaces.

 

After several years of observations, what was discovered was that the homes with traditional vents actually had consistently higher relative humidity levels and potentially destructive levels, in their crawlspaces than did the homes that had the vents closed off.  What was concluded was that to vent just for the sake of venting is not a sound or advisable building technique. While venting is still useful and, for the most part, recommended by environmental experts, venting should be scientifically controlled based upon relative humidity levels and not just temperature.

 

While some professionals in the building industry promote the theory that no venting is better than poor venting, we at Jersey Shore Home Moisture Management believe that the correct science supports venting at the proper time and under the proper conditions.

 

We feel that an exchange of air in your crawlspace and the circulation of your indoor air, when done in coordination with your crawlspaces relative humidity levels, will still provide you with the best possible protection against unhealthy conditions establishing a home in your crawlspace.

 

WHAT CAN YOU DO NOW!  

 

·        Have Your Vents Inspected To Insure Proper Operation.

·        Consider Replacing Old Temp Vents With The Latest

Humastatically Controlled Vents.