GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Blocking Soffit Vents on Empty New House

potton | Posted in General Questions on

My house with cathedral ceiling (single slope roof) in zone 6 is under construction and I will lack time to install the vented aluminium soffits before winter, but I need to block access to bird, mouse, etc to inside of roof.
QUESTION: Are there any issues with blocking all roof ventilation?  (The ceiling will be have been insulated but the house will be unoccupied and barely heated – or not att all – during the winter).

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. user-5946022 | | #1

    wont it take similar time to install the soffits as it will to block the spaces?

    1. potton | | #4

      I want to install soffits after having installed wall’s wood siding, which will be next year…

  2. charlie_sullivan | | #2

    The possible concern would be that even though it's unoccupied, the humidity could be high from construction moisture coming out of the concrete, drywall mud, possibly wet lumber, etc.

    1. potton | | #5

      Good point. But concrete slab is sealed with 10mil poly, walls were prefab with dry lumber, and inside is still unfinished…

  3. Expert Member
    BILL WICHERS | | #3

    You’ll still get moisture drive from day/night temperature swings so you don’t want to block off your venting. I would get a roll of 1/4 or 1/2 inch mesh hardware cloth (it looks like giant window screen), then make critter barriers out of it. Hardware cloth is relatively cheap, chew proof, and readily available. This way you preserve your ventilation while also keeping out critters.


    1. potton | | #6


Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |