Keeping Water Out of Decks

Careful detailing of trouble spots ensures longevity

Predictably, our climate causes a lot of water-related problems, making good flashing details paramount to the longevity of decks and the houses they are attached to.

 

Moisture Management

  • Field-Treating Pressure-Treated Pine

    Even though it's not required by code, it's a good idea to treat all cuts and penetrations in PT pine with copper naphthenate-if you can find it

     
  • Making Porch Floorboards Last

    During many years as a restoration contractor, I bet I’ve replaced over a mile of rotten porch floorboards. Today’s fast-growth lumber has very little natural resistance to rot, so it’s vital that you completely seal the boards before they’re installed.

     
  • Landscaping designs and decking without gaps can drastically affect the drying potential of the framing beneath the deck.

    Decay Resistance and the Code

    Using decay-resistant lumber, field-treating cut ends with preservative, and providing adequate airflow are all ways to help prevent wood decks from rotting. But when are they required by code, and when are they a good idea even if not required?

     
  • Everflashing Ledger Flashing

    Preformed flashing is designed to protect the ledger connection with the house

     
  • Cofair Products Deck Flash Barrier

    This self-adhering peel-and-stick membrane protects joist tops from moisture damage

     

Finishes

 

All Decking & Railing Articles


  • Deck and Trim Plugs

    Starborn now offers a Pro Plug System for PVC decking and trim. The tool is designed to drive fasteners to the correct depth without stripping them. Plugs are made from decking material from a number of manufacturers, including Azek, Endeck, and Fiberon.

     
  • Durarail Adds Cable Railing

    Authorized Durarail installers are now able to offer a cable railing option for their decks. The company says components snap together, resulting in a minimum of on-site work and few exposed fasteners. Posts and top rails are powder-coated aluminum, and the stainless steel cable comes in three...

     
  • Field-Treating Pressure-Treated Pine

    Even though it's not required by code, it's a good idea to treat all cuts and penetrations in PT pine with copper naphthenate-if you can find it

     
  • Edge Detail for Capped Composite Decking

    A less expensive alternative to installing a picture-frame border to conceal cut decking ends

     
  • Mountain Laurel Railings

    Custom-made mountain laurel railings add an artistic twist to a deck design

     
  • Building Waterproof Roof Decks

    Get better performance from your deck covering by using ‘best practices’ framing and flashing details

     
  • Feeney Lighting for DesignRail

    New LED railing lights fit into recesses in the top and bottom rails

     
  • Fypon Woodgrain Structural Columns

    Steel-reinforced polyurethane holds up better than wood to insects and moisture

     
  • Thompson's WaterSeal Waterproofing Stain

    A flexible film accommodates natural wood movement

     
  • A stair landing should be framed like a small deck capable of supporting 40-psf live loads and 10-psf dead loads. Some inspectors may also require the landing to support 300-pound concentrated loads, like a stair tread.

    Mid-Stair Landings

    Should a landing be treated as part of the stairs or as a separate deck?

     
 
Deck Builder Video Gallery

New Deck Builder Video Gallery

Check out How-To and Product Videos from our Staff and Contributors