FHB Logo Facebook LinkedIn Email Pinterest Twitter X Instagram Tiktok YouTube Plus Icon Close Icon Navigation Search Icon Navigation Search Icon Arrow Down Icon Video Guide Icon Article Guide Icon Modal Close Icon Guide Search Icon Skip to content
Subscribe
Log In
  • How-To
  • Design
  • Tools & Materials
  • Restoration
  • Videos
  • Blogs
  • Forum
  • Magazine
  • Members
  • FHB House
  • Podcast
Log In

Discussion Forum

Discussion Forum

I&W in the valleys

| Posted in Construction Techniques on July 12, 2005 04:57am

How much, to be safe?  One strip width?  Meaning 18 inches up each slope, the crease right down the middle?

How about that with an 18 inch strip lapped on each side, yields about 33 inches up each slope?

Doubled?

Gene Davis, Davis Housewrights, Inc., Lake Placid, NY

 

 

Reply
  • X
  • facebook
  • linkedin
  • pinterest
  • email
  • add to favorites Log in or Sign up to save your favorite articles

Replies

  1. davidmeiland | Jul 12, 2005 06:00am | #1

    The roofer I use does a single 36" strip up a valley, giving 18" per side. He then weaves in the 30lb ASTM felt over that as usual. Just like the old days... except they didn't use I&W in the old days and valleys worked fine then too.

    I assume you are not going with a metal valley. I tend to like those better, in copper, but that's just me.

    1. gdavis62 | Jul 12, 2005 12:22pm | #2

      A copper valley with a "w" ridge up the center will go in all, but we are in serious ice and snow country, and need some extra protection.Gene Davis, Davis Housewrights, Inc., Lake Placid, NY

       

       

      1. seeyou | Jul 12, 2005 01:20pm | #3

        I'm of the mind that you shouldn't have to rely on I&WS to keep a valley from leaking. I use it on re-roofs to protect the house until I get the roof redone, but wouldn't use it on new construction (in the valleys).I'm not green anymore.

  2. Hazlett | Jul 12, 2005 02:17pm | #4

     Gene,

     I am in Ohio.

     we use a single strip 36" wide centered in the valley(18"/side)

    However---if I was in Lake   Placid-------I think lapping an additional strip on each side would be an excellent idea.

     Now is the time to do it----you will never regret having done it----but you might regret NOT doing it, LOL

    Stephen

    1. seeyou | Jul 12, 2005 02:32pm | #5

      Stephen-

      I was just up your way last week. Bought a dump trailer at a factory about 30 miles east of Canton. Excellent deal if you're in the market.I'm not green anymore.

      1. Hazlett | Jul 13, 2005 03:09am | #6

         thanks----but nooooothanks

        If I had a dump trailer I would have to have somewhere to park it, I would have to insure it, maintain it, load it---or hire someone to load it----not to mention tow it.

         My current system works MUCH better for me.

        BTW------if you were that close I wish you had let me know----I would love to have had you over for lunch---or meet ya and buy ya lunch somewhere

        maybe next time?

        stephen

        1. seeyou | Jul 13, 2005 03:41am | #7

          Maybe next time. I didn't even think about it until I saw a sign saying "Akron 40 miles". I was pretty much on a mission from God. I made the round trip in about 12 hours. By the same token, let me know if you get down this way. We're gearing up to start a 70+ square copper roof in the next week or two. I think I'm gonna post a journal on this one.

          I tried one of those waste disposal companies. What a nightmare. They wanted us to work to their schedule instead of them to ours. We normally use dumpsters, but I often wind up with 3 jobs going at the same time that each generate a p/u truck+ load of trash. Instead of 3 trips to the transfer station, we can only make one.

          I often load a trailer up with pans or whatever for the day and deliver it to the job. Disconnect it and whenever the crew leaves, they load trash or anything that needs to come back to the shop and bring it back.I'm not green anymore.

  3. Shawzall | Jul 13, 2005 04:26am | #8

    Gene,

    I use a full 36" leaving 18" to either side the rip a 36" and apply a half to either side.  I don not use felt paper any more I use Gace's roof wrap pruduct.  It is worth the extra $ especially where we live.

Log in or create an account to post a comment.

Sign up Log in

Become a member and get full access to FineHomebuilding.com

Video Shorts

Categories

  • Business
  • Code Questions
  • Construction Techniques
  • Energy, Heating & Insulation
  • General Discussion
  • Help/Work Wanted
  • Photo Gallery
  • Reader Classified
  • Tools for Home Building

Discussion Forum

Recent Posts and Replies

  • |
  • |
  • |
  • |
  • |
  • |
View More Create Post

Up Next

Video Shorts

Featured Story

Podcast Episode 690: Sharpening, Wires Behind Baseboard, and Fixing Shingle Panels

Listeners write in about fireplaces and ask questions about sharpening hand tools, easier wiring upgrades, and fixing cedar siding.

Featured Video

SawStop's Portable Tablesaw is Bigger and Better Than Before

The 10-in. Jobsite Saw PRO has a wider table, a new dust-control port, and a more versatile fence, along with the same reliable safety mechanism included in all SawStop tablesaws.

Related Stories

  • Podcast Episode 690: Sharpening, Wires Behind Baseboard, and Fixing Shingle Panels
  • FHB Podcast Segment: Hand Tool Sharpening Tips
  • Old House Air-Sealing Basics
  • A Drip-Free, Through-Window Heat Pump

Highlights

Fine Homebuilding All Access
Fine Homebuilding Podcast
Tool Tech
Plus, get an extra 20% off with code GIFT20

"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Fine Homebuilding Magazine

  • Issue 332 - July 2025
    • Custom Built-ins With Job-Site Tools
    • Fight House Fires Through Design
    • Making the Move to Multifamily
  • Issue 331 - June 2025
    • A More Resilient Roof
    • Tool Test: You Need a Drywall Sander
    • Ducted vs. Ductless Heat Pumps
  • Issue 330 - April/May 2025
    • Deck Details for Durability
    • FAQs on HPWHs
    • 10 Tips for a Long-Lasting Paint Job
  • Old House Journal – August 2025
    • Designing the Perfect Garden Gate
    • Old House Air-Sealing Basics
  • Issue 329 - Feb/Mar 2025
    • Smart Foundation for a Small Addition
    • A Kominka Comes West
    • Making Small Kitchens Work

Fine Home Building

Newsletter Sign-up

  • Fine Homebuilding

    Home building tips, offers, and expert advice in your inbox.

  • Green Building Advisor

    Building science and energy efficiency advice, plus special offers, in your inbox.

  • Old House Journal

    Repair, renovation, and restoration tips, plus special offers, in your inbox.

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters

Follow

  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X
  • Fine Homebuilding

    Dig into cutting-edge approaches and decades of proven solutions with total access to our experts and tradespeople.

    Start Free Trial Now
    • Facebook
    • Instagram
    • X
    • LinkedIn
  • GBA Prime

    Get instant access to the latest developments in green building, research, and reports from the field.

    Start Free Trial Now
    • Facebook
    • YouTube
  • Old House Journal

    Learn how to restore, repair, update, and decorate your home.

    Subscribe Now
    • Facebook
    • Instagram
    • X

Membership & Magazine

  • Online Archive
  • Start Free Trial
  • Magazine Subscription
  • Magazine Renewal
  • Gift a Subscription
  • Customer Support
  • Privacy Preferences
  • About
  • Contact
  • Advertise
  • Careers
  • Terms of Use
  • Site Map
  • Do not sell or share my information
  • Privacy Policy
  • Accessibility
  • California Privacy Rights

© 2025 Active Interest Media. All rights reserved.

Fine Homebuilding receives a commission for items purchased through links on this site, including Amazon Associates and other affiliate advertising programs.

  • Home Group
  • Antique Trader
  • Arts & Crafts Homes
  • Bank Note Reporter
  • Cabin Life
  • Cuisine at Home
  • Fine Gardening
  • Fine Woodworking
  • Green Building Advisor
  • Garden Gate
  • Horticulture
  • Keep Craft Alive
  • Log Home Living
  • Military Trader/Vehicles
  • Numismatic News
  • Numismaster
  • Old Cars Weekly
  • Old House Journal
  • Period Homes
  • Popular Woodworking
  • Script
  • ShopNotes
  • Sports Collectors Digest
  • Threads
  • Timber Home Living
  • Traditional Building
  • Woodsmith
  • World Coin News
  • Writer's Digest
Active Interest Media logo
X
X
This is a dialog window which overlays the main content of the page. The modal window is a 'site map' of the most critical areas of the site. Pressing the Escape (ESC) button will close the modal and bring you back to where you were on the page.

Main Menu

  • How-To
  • Design
  • Tools & Materials
  • Video
  • Blogs
  • Forum
  • Project Guides
  • Reader Projects
  • Magazine
  • Members
  • FHB House

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Podcasts

  • FHB Podcast
  • ProTalk

Webinars

  • Upcoming and On-Demand

Popular Topics

  • Kitchens
  • Business
  • Bedrooms
  • Roofs
  • Architecture and Design
  • Green Building
  • Decks
  • Framing
  • Safety
  • Remodeling
  • Bathrooms
  • Windows
  • Tilework
  • Ceilings
  • HVAC

Magazine

  • Current Issue
  • Past Issues
  • Magazine Index
  • Subscribe
  • Online Archive
  • Author Guidelines

All Access

  • Member Home
  • Start Free Trial
  • Gift Membership

Online Learning

  • Courses
  • Project Guides
  • Reader Projects
  • Podcast

More

  • FHB Ambassadors
  • FHB House
  • Customer Support

Account

  • Log In
  • Join

Newsletter

Get home building tips, offers, and expert advice in your inbox

Signing you up...

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
See all newsletters
See all newsletters

Follow

  • X
  • YouTube
  • instagram
  • facebook
  • pinterest
  • Tiktok

Join All Access

Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features.

Start Your Free Trial

Subscribe

FHB Magazine

Start your subscription today and save up to 70%

Subscribe

Enjoy unlimited access to Fine Homebuilding. Join Now

Already a member? Log in

We hope you’ve enjoyed your free articles. To keep reading, become a member today.

Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine.

Start your FREE trial

Already a member? Log in

Privacy Policy Update

We use cookies, pixels, script and other tracking technologies to analyze and improve our service, to improve and personalize content, and for advertising to you. We also share information about your use of our site with third-party social media, advertising and analytics partners. You can view our Privacy Policy here and our Terms of Use here.

Cookies

Analytics

These cookies help us track site metrics to improve our sites and provide a better user experience.

Advertising/Social Media

These cookies are used to serve advertisements aligned with your interests.

Essential

These cookies are required to provide basic functions like page navigation and access to secure areas of the website.

Delete My Data

Delete all cookies and associated data