1 to all roof coverings.
Gaps at bottom of siding.
Step 7 seal larger gaps up to 1 2 inch wide with polyurethane caulk.
The relief cut prevents the strips we are making from clipping on the bottom of the siding snugly.
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The foundation goes up a few inches more beneath the siding so the lowest set of nails holding the siding on are a few inches up from the bottom of the siding.
We provide a table of all fiber cement siding installation clearance or gap specifications caulking requirements storage or moisture requirements.
Fiber cement siding gap clearance caulking.
Seal small cracks and gaps in your siding under 1 4 inch wide using an acrylic latex caulk.
Bottom of siding boards should not be caulked water is meant to exit through the bottom of each board.
This is messier than acrylic latex but effective.
At least 6 inches of clearance from the bottom of the siding to the finished grade.
The siding has many moisture weep holes i believe this relief cut simply allows for a very clean overlap of sections of siding.
Position a stepladder if needed beneath the window door or other area with gaps in the exterior trim.
Hardie boards should be joined in moderate contact.
Also avoid caulking tongue and groove siding boards together.
While paint does tend to somewhat glue these pieces together caulking them is never advised and can cause permanent damage.
Paint works well over it.
3 16 gap at butt joints between horizontal sections and where the siding meets doors windows and corner trim.
Simply apply this inexpensive filler into the cracks to seal.
If this is a problem you could just use a slightly wider strip that overlaps the relief cut.
Joining hardie boards together is actually very easy but there are a number of ways that contractors get it wrong.
Foam backer rod sounds like a good method to use if it should be sealed.
3 8 gap above windows and doors with visible flashing.