If too much of the joist is rotted, you must replace the whole board. If you can't get under the deck, your only choice is to pull all of the boards nailed to the joist and tear it out. If you can get under the deck, you should be able to cut the nails with a sawzall and drop the errant joist to the ground.
Localized damage factors are usually pretty easy to spot and repair. One example is a plant container sitting on top of the deck boards that has overflowed so often that wet rot has started to decay the deck boards. In that case, the deck boards are discolored, damp and mushy only under the container.
Remove nails or screws from the damaged decking board using a pry bar, screwdriver or drill. If the fasteners won't come out, chop the board into pieces with a chisel or saw, pry up the slivers, and replace.
Remove rotten board and replace. BEWARE NEVER USE DECK SCREWS - DECK SCREWS VS NAILS - PART TWO IN DESCRIPTION - Duration: 6:39. STEVE ROB REVIEWS 168,411 views
Replacing a bad deck board is very easy. Even if it’s only part of it. Most deck boards can be very long and you don’t have to replace the whole board. In this video, I explain how to just replace something like 4 feet of one. You may have a 20-foot board but only the end is ugly.
No need to replace the boards if they are not rotted. cheapest way to do it - sand with what you have (no rental) power sander if yu have one, hand if not. 100 grit if by hand, 150 grit in an random orbital sander.
If the deck frame is in poor condition, it may be easier to tear down the entire deck and rebuild it from scratch. Otherwise, you can begin removing the existing decking. If the deck was screwed down, this will be easy.
To replace a bad deck board you will need rustproof deck screws, a power screwdriver, a power drill and a pilot drill bit. If your deck boards are screwed down, simply unscrew the damaged board, cut a replacement to the same length, and screw it down with rustproof deck screws. It is best to replace entire boards.
Replacement is the only way to remedy severely damaged or deteriorated decking. Most homeowners pay between $5 and $15 per square foot for deck removal. If you have a multi-story deck or heavy components like metal railing, removal pricing can be more.
Wood decks can weather, crack and splinter. Use these steps to replace a damaged deck board.
Step 3 - Remove the Decking. If there is insufficient room to replace the joist from below, you will have to remove the decking to access the joist from above. Decking typically comes as 5/4 x 6 inch boards that run perpendicular to the joists.
The rising price of lumber makes replacing decking boards a significant expense, and it's one you may be able to avoid. By so doing, you'll also preserve the appearance of your deck.
2. Remove the shingles over the area of the rotted roof decking identified previously. Locate nails that hold shingles in place by lifting up on the end shingle above the one you plan to remove.
Repair for your deck depends largely on its composition. Cedar and redwood boards that become damaged, for example, require careful selection to replace because they have a distinctive grain pattern, and as a result, you may need to replace an entire section to create a matching look.
Examine the area around the damaged section of the deck board, noting the locations of the joists and the end seams on the board. The goal is to cut out the damaged section cleanly and make the repair look as natural as possible.