Replies

1. 
   john_m1 | Apr 28, 2020 03:08pm | #1

   Isn’t Maryland in climate zone 4 or 5?
   Similar situation for me. 1880s Victorian covered with aluminum siding.

1. GBA Editor
   Brian Pontolilo | Apr 28, 2020 04:31pm | #3

   Most of Maryland is Climate Zone 4A. You can find that info here: https://codes.iccsafe.org/content/IRC2018/chapter-11-re-energy-efficiency

2. 
   Fiorenini | Apr 28, 2020 03:47pm | #2

   I thought we were 5 as well but a search earlier said its 7. Where should I check for clarification, I may very well be wrong.

   Frank

1. Expert Member
   Dana Dorsett | Apr 30, 2020 12:24pm | #6

   https://www.greenbuildingadvisor.com/article/all-about-climate-zones

   https://beta.greenbuildingadvisor.com/app/uploads/sites/default/files/images/DOE_climate_zone_map.preview.jpg

   http://bcapcodes.org/code-status/state/maryland/
   >"Where should I check for clarification, I may very well be wrong."

   https://www.energy.gov/sites/prod/files/2015/10/f27/ba_climate_region_guide_7.3.pdf

   http://bcapcodes.org/code-status/state/maryland/

   http://bcapcodes.org/wp-content/uploads/2012/01/cz-map_maryland.png

   Only Garrett county is zone 5- the rest of the state is zone 4.

3. GBA Editor
   Brian Pontolilo | Apr 28, 2020 04:38pm | #4

   Hi Frank.

   You should try to accomplish a few goals including air sealing and insulating, while making sure that your water-management details are working (water-resistive barrier, flashing at windows, doors, and other penetrations).

   There are lots of possibilities, and I'm sure you'll get a bunch of opinions, but it would be helpful for us to know what's behind the existing siding and what is going on inside the walls.

4. 
   Fiorenini | Apr 28, 2020 04:56pm | #5

   Hello Brian,
   I have not yet pulled any existing siding down but from the very few spots that I have been able to see from interior projects, i have found that there are random areas of insulation and studs do need seem to be evenly spaced, there will also be some damage that I will take care of when the siding is down. My main questions are around the specifics around what I should be using. I am willing to spend extra to buy all of the necessary items for the job. I also plan to start on the rear of the house that is roughly 500sq ft. Is fiberglass insulation better than foam board insulation, is Tyvek better than felt paper, is a rain screen needed? I would hate to spend money and realize that I did not get the right materials for my area and application. I am also not sold on LP, I have used Hardie in the past and not committed to either.
   Thank you for reaching out,
   Frank