Results 1 to 2 of 2
  1. #1
    Zane Remenda's Avatar
    Zane Remenda Guest

    Default Maximum slope for built-up roofs (tar & gravel)

    Hi all,

    Just wondering if anyone knows what the maximum slope is for a built-up roof (tar and gravel). I frequently see tar and gravel on flat roofs, but rarely on sloped roofs.

    The roof was less than 8 years old and was missing a lot of gravel.

    Thanks
    Zane

    Similar Threads:
    ***IMPORTANT*** You Need To Register To View Images ***IMPORTANT*** You Need To Register To View Images
    Member Benefits1

  2. #2
    Join Date
    Mar 2007
    Location
    Ormond Beach, Florida
    Posts
    26,252

    Default Re: Maximum slope for built-up roofs (tar & gravel)

    Quote Originally Posted by Zane Remenda View Post
    Just wondering if anyone knows what the maximum slope is for a built-up roof (tar and gravel).
    Depends on the type of asphalt used.

    "Dead level" asphalt is what is used on flat roofs, when that asphalt heats up in the sun it tries to seek its own level, kinda like very slow moving water - but it is trying to seek 'level' and puddle there.

    "Flat" asphalt can be used on roofs up to a 1/4:12 slope.

    "Steep" asphalt can be used on, as I recall, roofs up to 3:12 slope. (I've read 2:12 and 3:12, so it may depend on the manufacturer?)

    "Special steep" can be used on, as I recall, roofs up to 6:12 slope.

    Jerry Peck, Construction / Litigation Consultant
    Construction Litigation Consultants, LLC ( www.ConstructionLitigationConsultants.com )
    www.AskCodeMan.com

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •