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

Posts for deck over existing roof…h…

| Posted in General Discussion on May 23, 2000 04:20am

*
This is an upcomming project on my own house. I’m planning a deck(for the eventual hot-tub). The deck to be will be on a ledger attached to the wall, and on posts that will come out of the kitchen bump out roof. The roof is now shingled with 3 tab and will be reroofed at the same time. I’m thinking maybe standing seam metal, any ideas on a long term roofs will help. The fact it’ll be under a deck makes me want something that will last at least as long as the deck! Maybe just dimensional shingles, metal sounds like it’ll last longer though. No idea how to do a metal roof, time to read alittle and get a few bids. The only weak link would be the posts commimg up from the room belows corners. I was thinking chamfering the square posts into octagons and using boots, or cut kerfs into the posts and folding a lipped flashing into the kerfs. The roof is only about a 3/12.If this makes sense, any ideas? I don’t feel real secure using anything but boots, but square skylights flash fine! I’m thinking the post might just hit the center of one or two shingle tabs and not be stepped enough to let the whole over lap thing do it’s job. How ’bout a big goop ‘o tar….that’ll hold ‘er! Jeff.

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

Replies

  1. Guest_ | May 16, 2000 12:03pm | #1

    *
    Jeff,

    Will the new deck cover the roof completly or will it be seen from the ground? The reason I ask is,an EDPM membrane might be the way to go.Most companys have whole books on flashing details for every area of the roof.

    Vince

    1. Guest_ | May 16, 2000 12:36pm | #2

      *You might take a trip over to the outterbanks and climb up on one of their roofs. With all the roof-top decks they have to see the water over their neighbors, they probably have a myriad of ideas and systems. First time I saw them, I couldn't believe it. How'd they did that?It'd be a working vacation afterall.

      1. Guest_ | May 16, 2000 03:11pm | #3

        *jeff...don't use boots.. cut a kerf and fold some nice copper flashings.. ((flash and counterflash)))the EPDM will work fine too, uncured rubber with seam caulk will last about twenty years...there are all kinds of clever ways of doing this...but i'd stay away from boots...b but hey, whadda i no?

        1. Guest_ | May 16, 2000 06:28pm | #4

          *If there is little or no eave, one idea is to bolt the railing posts to the facia board of the kitchen roof and hang a ledger on them to accept the outside edge of the deck. This eliminates any holes in the roof but, of course, creates different problems. It depends on if you want to retrofit the roof well enough to create a load bearing facia. Just a thought.

          1. Guest_ | May 17, 2000 03:06am | #5

            *Jeff,If you go with metal, you will have to install the roof first, with all provisions for supporting the deck in mind. You can't really do metal around deck posts unless they just happen to all fall on seams. I think 3/12 is the bare minimum for metal roofing. Another thing to consider is the heat coming off the metal roof on those hot Pittsburgh days, kind of cook you up like a big pierogie!MD

          2. Guest_ | May 17, 2000 03:56am | #6

            *Jeff, Put the metal panels, SM or PBR on first with provisions for point to point load transfer. The post could just sit on roof. Use galvalume panels and screws and the roof will outlive you. Materials will cost about $100 sq. for best grade and installation will be quick and easy.KK

          3. Guest_ | May 17, 2000 06:02am | #7

            *It will not be seen anywhere except thru the deck boards, and if anyone complains they'll have to get the hell out of the hot tub! Never even thought of EDPM, just may be the way to go. Roof's small enough to maybe get away without a seam, just a coupla holes. Jeff

          4. Guest_ | May 17, 2000 06:06am | #8

            *Thought about the heat too. It's the sunny side of our shaded(or is that shady) home, and the shingles are cooked pretty much done. Gotta vent/insulate the bumpout too, the kitchen is unbearable in the summer.Jeff

          5. Guest_ | May 18, 2000 05:16am | #9

            *Jeff: Setting a post directly on the metal roofing will trap moisture & cause the roofing to rust. You might consider using pipe columns in lieu of wood. You can flash the pipe with a dektite flashing. Properly installed it will not leak and it will last for many many years. Just a thought. Ron.

          6. Guest_ | May 23, 2000 04:13am | #10

            *Had a similar problem when a bone-head engineer insisted on putting 4x4 fence posts inside a parapet wall for a deck. I kerfed the 4x4's in about 1/2" square to each face then another kerf coming up at a 45 degree angle to meet the first kerf. Had sheet metal sleeves made with a top flange bent in 45 degrees. Filled the kerfs flush with SIKA 1A.In your case, you'll need a pair of sleeves to fit over each other: one for the bottom and two sides and another for the top and two sides. Have flanges at least 6" all the way around to fit onto the roof deck. You may want to consider putting a 24" square piece of glass base sheet under each sleeve and burning down a piece of modified bitumen onto the base sheet and PRIMED sheet metal. Roofing felt and three-tab shingles could then be installed normally.Good luck.

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

Tools and Gear for the Moms Who Get it Done

From work boots to power tools, these favorite picks make perfect gifts for moms and women who build.

Featured Video

How to Install Cable Rail Around Wood-Post Corners

Use these tips to keep cables tight and straight for a professional-looking deck-railing job.

Related Stories

  • Podcast Episode 684: Masonry Heaters, Whole-House Ventilation, and Porch Flooring
  • FHB Podcast Segment: Repairing an Old Home While Maintaining Its Integrity
  • Tools and Gear for the Moms Who Get it Done
  • An Easier Method for Mitered Head Casings

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 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
  • Issue 329 - Feb/Mar 2025
    • Smart Foundation for a Small Addition
    • A Kominka Comes West
    • Making Small Kitchens Work
  • Issue 328 - Dec/Jan 2024
    • How a Pro Replaces Columns
    • Passive House 3.0
    • Tool Test: Compact Line Lasers
  • Issue 327 - November 2024
    • Repairing Damaged Walls and Ceilings
    • Plumbing Protection
    • Talking Shop

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 81%

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