[MassHistPres] Rhino Shield

[Marcia Starkey]

Hello all,

The first prinicpal of art conservation is that any treatment must be reversible. This might also be good guidance for historic buildings. 

Marcia Starkey, Greenfield HC 
  ----- Original Message ----- 
  From: Garrett Laws 
  To: Eric Hertfelder 
  Cc: masshistpres at cs.umb.edu 
  Sent: Monday, June 01, 2009 2:15 PM
  Subject: Re: [MassHistPres] Rhino Shield


  Here's a roofers perspective on this matter...for what it's worth.


  Wood and framing:
  You have to look at the areas where moisture WILL enter the envelope of the structure and if you can Guarantee (yes with a capitol G) that there won't be any moisture harbored behind the encapsulation than go for it. Unfortunately in the real world that can be guaranteed. Windows, doors and the human factor makes it really, really difficult to stop most moisture and definitely not all from being absorbed be the porous material that the encapsulation is trying to protect.


  Brick, stone and stucco:
  You might have a case here that the encapsulation can make the wall system last longer than paint would, but the frame would still need to be monitored somehow.


  For a real scientific answer, try searching on www.buildingscience.com/ as they have some really amazing information on how buildings REALLY work.


  Garrett




  On Mon, Jun 1, 2009 at 2:45 PM, Eric Hertfelder <EHertfelder at fortadams.org> wrote:

    Reviewers in historic districts in Rhode Island are contending with proposals from homeowners to treat their houses with “Rhino Shield” and other applications which essentially encapsulate exterior surfaces with a coating 10-15 times as thick as paint.   The maker suggests the coating will last for 25 years and provides insulation as well!



    As best I can tell, these coatings are not reversible; i.e., they bond to the surface to which they are applied and cannot be removed.



    Has anyone else dealt with this project?  Are there any historic district commissions out there that have decided to prohibit or to permit the use of such applications.



    Thank you.



    Eric Hertfelder

    Bristol, Rhode Island


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  -- 
  Cheers,
  Garrett

  Garrett Laws, Manager
  The Copper & Slate Company
  Fine Roofing and Exterior Finish Carpentry
  238A Calvary Street
  Waltham, MA 02453
  Ph: (781) 893-1916
  Fax: (781) 893-2041

  Copperandslate at Gmail.com or 
  GLaws at hbuilders.net 



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