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The Backyard Works Blog

Here you’ll find articles of interest to all Backyard Works customers, shed owners/lovers and those interested in adding a Backyard solution to their own backyard be it a shed, studio or Backyard Laneway House.

If you have any questions regarding Backyard Sheds construction or features or even DIY advice please let me know – leave a comment below or email your question through the Contact Us page. I’ll get back to you right away and you may even see your question featured here on the Backyard Works blog.

Best Regards,
Steve Curtis

Under Your Deck Shed: A Waterproof Ceiling & Storage Area:


Over the years I have noticed many backyard decks that have a lot of head space and room under them that could be utilized as storage space, but due to the spacing between the deck boards the area below is not water proof.

Recently a customer of mine asked me to proved him with a waterproof shed area under his deck.

His requirements where:

  • A completely waterproof ceiling to be installed under the deck
  • New walls and a door to enclose the area in order to provide for a secure storage area
  • Tie into the existing house siding and make the new storage walls look like they where part of the existing house.

How I built the under deck ceiling and walls:

The storage area was going to be built under the front deck in a corner of the house. I measured the area for new metal roof/ceiling panels. I had to figure out the exact length and width of the galvanized metal roofing panels as the panels are ordered cut to length. Then I determined the flashing profiles required in order to properly create a waterproof seal around the perimeter of the ceiling and walls. The flashing is custom made by my roofing supplier.

I used a metal roof panel with a profile that would allow the humps or ribs of the material to be attached to sloped pressure treated 2×4’s. The 2×4’s where attached to the underside of the deck joists. Once attached the slope on the 2×4’s would allow for the drainage of the roof. The customer also wanted the ability to clean off the roof panels, so enough space between the roof panels and the deck joists was needed in order to do so.


You will notice the two temporary cross pieces in the middle and back below the sloped 2×4’s these are there to hold the roof panels up while they are being installed to the 2×4’s.

If you look at the roof panel on the ground you will see that ribs have a light blue tape attached to them. This is a rubberize membrane material, called Blue Skin, which is installed to create a watertight seal between the metal panel and sloped 2×4 when the panel is screwed to the 2×4’s. The galvanized screws have a washer with a rubber gasket in order to seal the screw hole from leakage.

Custom flashing has been installed along the perimeter of the roof area that sits on top of the roof panels once installed. This creates a waterproof seal along the edges of the roof area, the existing house walls and the new storage walls.

First Roof Panel Installed:


Second Roof Panel Installed:


Then I installed the new wall for the storage area on the right side.


The second wall includes the door opening and threshold. The threshold framing for the door was built out of three pressure treated 2×6’s glued and screwed together on edge and cut on a slope in order to deal with the slope of the concrete paves on the ground. This was necessary so that the new door had a level threshold to be installed on top of.


Then I installed a pre-hung cut down 42” wide steel door. Pre-painted Hardi Plank siding was then installed on the wall in order to match and tie into the existing wall siding of the home.

Under Your Deck Shed: