Water Management Details

Siding breaks above penetrations like this dryer vent invite water right into the penetration hole and could allow water to leak inside the house.

This detail looks bad and makes the wall vulnerable to air and water leaks.

Again, the siding is simply slotted around the hose bib, inviting water and air leaks.

The correct way to deal with penetrations is to use a split mounting block. Beveled to drain downward, the split is also sealed with caulk.

Fiber-cement boards shouldn't be butted up against the trim, but should be left 1/8 inch short to allow for expansion. Th gap will allow for a caulk joint that will expand and contract with dimensional changes in the siding boards. Without the gap, you get a flat strip of caulk that is prone to peeling off.

Whoever installed this siding neglected to prime the cut ends - a requirement of the manufacturer's installation instructions, which building codes mandate must be followed.

Exposed edges near the base of a wall particularly need to be primed to protect them from water that runs down the face or that splashes up.

The gap above header flashing  should remain uncaulked, but should be at least 1/4-inch. This gap is much too small.

Per the manufacturer's installation instructions and the Evaluation Services Report (which take precedence over prescriptive buildin codes), there should be at least 1 inch to 2 inches of clearance between the siding boards and the porch surface.

Again, MaxiPlank calls for 1 inch to 2 inches of clearance between siding and a sidewalk.

The installers brought the siding down onto the roof surface, though there should be 1 inch to 2 inches of clearance for this brand of siding.

Note the absence of kick-out flashing.

Caulking is not a good substitute for flashing.

A true kick-out flashing, like this one, gathers water and directs it into the gutter. Note also the wide gap above the tim board follwing the rake. This allows any water flowing down the roof to be directed by the step flashing to the gutter, instead of wicking into the sidewall siding boards.

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