Repairing A Mahogany Deck

By Robert Robillard on Decks And Porches

Repairing A Mahogany Deck on a Historic House:

Today my main goal was to finish screwing down the 1×4 mahogany decking. I have been using 2 1/2″ self drilling stainless steel screws and pre-drilling all the butt joints. The downspout drain pipe shown in the corner runs through the deck and into a dry well pipe below. It never lined up properly because of the distance between the two pipes.

To make the downspout drain better and more efficient, I added a 4″ plastic drain pipe below the deck to connect the two pipes. The dry well drain pipe is shown below the decking.

Pipe installed.

The Tyvek vapor house wrap and clapboards were replaced. We used pre-primed, clear, vertical grain, cedar clapboards and installed them with stainless steel ring shank nails.

Care was taken to prime all the exposed end grain to seal the board from moisture.

We installed a new horizontal ground – along the deck surface. [Click on photo to enlarge] We used pvc trim for the ground and flashed it before installing the clapboards.

Steps were taken to match the “yellow” clapboard courses on the back of the house and to the right of the door.

Below: all the skirt, lattice and scotia moldings are applied. Most of the decking is now installed and fastened.

The next step in repairing a mahogany deck is to install the horizontal ground along the back of the house and install the last two deck boards.

Both left and right screen door jambs and door trim were rotted at the bottom. The screen door will need to be replaced.

The rot was pulled off so flashing could be applied below and behind it.

The rot extended deep; through the sheathing and 2×4 framing. All of the rot was cut back and removed.

Rubber was installed behind the clapboard and trim joint, behind the 2×4 framing and over the ledger board flashing.

The framing and sheathing was replaced with pressure treated material. The door jamb was replaced with a cedar board.

The door frame and trim will all be replaced with back primed, cedar boards.

Tomorrow should be the last day.

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About the author

Robert Robillard

Carpenter / Remodeler / Editor

Rob Robillard is “The Concord Carpenter” Rob is a builder, general contractor, carpenter, woodworker, and editor of Concord Carpenter and ToolBoxBuzzr As a General Contractor and carpenter, Rob owns and operates Concord Carpenter LLC. A full-service remodeling and construction company. Rob is a recognized leader in home building best practices and a source for how-to information for building professionals. On this website, Rob covers all aspects of home construction, building science, home improvement, woodworking, remodeling, and some of the best product and tool reviews. Rob is in charge of our Tool and Product Review series - Concord Carpenter Videos where we post all of our tool reviews and video tutorials. Rob approaches remodeling and building construction with a pragmatic and problem-solving approach. He enjoys using his knowledge and experience to help and educate building professionals as well as DIYers on best practices in the construction and remodeling industry. He's a strong advocate for "raising-the-bar" in the construction trades and promoting the trades to youth. #BeAMentor #Green2Great Craftsmanship, quality, and pride guide his journey on this channel The Concord Carpenter's motto: "Well done is better than well said!" : Read more about Rob

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