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WOOD STRUCTURE ASSESSMENT
This article explains critical deck flashing details for decks in order to avoid rot and leaks at the deck ledger board and at the building to which a deck is attached, and we provide deck or balcony design and construction details for waterproofing at door jambs and sills.review of that book. Also see DECK FLASHING LEAKS, ROT Case Study for an example of an older deck with rot and collapse due to improper construction and missing building flashing.
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Details of Proper Flashing & Waterproofing at a Deck or Balcony Ledger Board
Details of Proper Flashing & Waterproofing at a Deck or Balcony Door or Slider
Specialty Deck Flashing Products
For deck flashing at ledgers, deck perimetrs, and sliding doors entering onto decks there are pre-fabricated specialty flashing products that can help assure a durable design (and are more reliable than betting on caulks and sealants alone).
Everflashing is a Minnesota company that produces stainless steel and aluminum deck flashing. A schematic of an Everflashing deck ledger flashing product is shown at below-left [click to enlarge], and a second photo (below right), also provided courtesy of Mark Morsching, Everflashing, shows a stainless steel ledger board flashing product from that company as well as other deck construction details.
Leave an Air Space or Gap Between the Deck Ledger and the Building to Avoid Rot and Leaks
Free-Standing Decks: an Alternative to Using a Deck Ledger to Attach a Deck to the Building
-- Adapted with permission from Best Practices Guide to Residential Construction.
Also see DECK FLASHING LEAKS, ROT Case Study for an example of an older deck with rot and collapse due to improper construction and missing building flashing.
Other flashing articles:
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