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Posted by Robert Gammon on August 21, 2006, 8:41 am
Robert Allison wrote:
> LM wrote:
>
>> Is it a good idea to install furring strips under the siding for
>> better ventilation ? I had some conflicting opinions on this. The
>> home is in Northwest and we get lot of rain here.
>> I already decided to use tar paper instead of Tyvek home wrap and
>> gave up on the extra foam insulation on exterior walls to make the
>> home more breathable.
>>
>> thanks
>> Luke
>>
>
> Hardiplank siding does not have the same properties as wood. It does
> not absorb and disperse moisture the way that wood does, so the
> furring strips are not necessary. I will install hardiplank directly
> onto the framing or substrate. I will not do this with wood siding.
> The "rainguard" technique (furring strips to provide an airspace) is
> the only good way to make wood siding last. Hardiplank doesn't need
> it. It won't hurt to have it, but it is not required.
>
www.buildingscience.com does recommend furring strips behind cement
siding products like Hardi Plank in some climates. Their
recommendations are CLIMATE specific.
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