[MassHistPres] windows and stretch code

[Scott A. Winkler, AIA]

The Stretch Energy Code specifically exempts repair to existing window sash
and frame, and installation of storm windows over existing fenestration
(existing window openings).  The only confusion that may come up with the
building official is that the windows are into a space that has previously
been unoccupied (like finishing an unfinished basement).  This area is not
considered an Addition, as you are not increasing the building area or
height (adding structure), and would be considered an Alteration.  This
altered area would need to comply with the envelope energy improvements.
Regardless of this, the existing windows are still exempted.  Also, it is
worth noting that in a renovation or alteration, you are only required to
insulate exterior walls that are opened up during renovation and only need
to use insulation that has an r-value of 3.5 per inch, like typical
fiberglass batts.  I have seen building officials push for spray foam
insulation, even though it was not appropriate for the building.

So no, the entire house does not need to be brought up to the latest energy
code.

You can find the stretch code as Appendix 115 AA here:

http://www.mass.gov/eopss/docs/dps/8th-edition/115-appendices.pdf

Also, be sure to check the map for your community to be sure they have
adopted the stretch code.  Belmont has adopted it.

-- 
Scott A. Winkler, AIA, LEED AP
Preservation Architect


Message: 2
Date: Wed, 02 Jul 2014 17:25:22 -0400
From: Ralph Slate <slater at alum.rpi.edu>
Subject: Re: [MassHistPres] windows and stretch code
To: MassHistPres MA <masshistpres at cs.umb.edu>
Message-ID: <53B478C2.4030108 at alum.rpi.edu
>
Content-Type: text/plain; charset=UTF-8; format=flowed

Are you saying that if there is a renovation that requires a building
permit (like doing over a bathroom or kitchen), the entire house must be
brought up to energy compliance code?

Is the exemption for local historic districts as well as National/State
Register?

Ralph Slate
Springfield Historical Commission

On 7/2/2014 4:56 PM, Alison Hardy wrote:
>
> Code applies if the renovation/addition requires a building permit.
>
> For historic home owners, understanding the ramifications of the
> stretch energy code is critical because most building inspectors only
> understand the prescriptive path and most builders will take the less
> ?risky? path of just buying the specified products and putting them in.
>
> The performance path is considered riskier as the rating can only be
> done at the end for the whole renovation/addition. If the insulation
> was done badly, or the foundation leaks, or if a door was not
> installed properly then it?s possible the renovation in it?s entirety
> will not get an adequate HERS score.
>
> Thankfully houses that are on the National or state register are
> exempt (and let us hope that rule does not change!). Many builders and
> building inspectors are also not aware of that exemption so it?s
> important that the homeowner knows.
>
> I have been asked to salvage too many beautiful antique windows by
> homeowners tell me their builder told them they HAD to put in new
> windows when they remodeled or added on.
>
> Alison Hardy
>
> email logo image
>
> 58 Pulaski Street
>
> Peabody, MA 01960
>
> 978-532-2070
>
> As seen on This Old House. Please visit our web site at
>
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> episodes.
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