Proper Flashing At The Bottom Of Hardie Siding

Proper installation of flashing behind siding common mistakes involving step flashing.

Proper flashing at the bottom of hardie siding. James hardie also does not recommend applying caulk to the horizontal overlap between siding planks see figure 2. Cover with cap flashing. Installation of a continuous sheet of metal flashing from the top of the roof to the bottom of the roof in lieu of step flashing is not a correct method of installation in many instances. James hardie recommends the use of caulks and sealants that remain permanently flexible.

When james hardie siding products butt into wood based materials a 1 8 gap will allow for expansion and contraction of the wood based product. How to install step flashing under siding. Horizontal clearance between james hardie trim products and decks paths steps and driveways. Lift the bottom shingle and slip in the kickout flashing.

Gap flashing do not caulk figure 5 maintain a 1 4 in. Nail it to the sidewall or glue it if nailing isn t possible. Hardie siding requires a minimum 2 gap from all hard surfaces like decks or rooflines and at least 8 from any soft surfaces like grass dirt or gravel. Joint flashing butt joint horizontal lap treatment june 2014 james hardie does not recommend caulking butt joints or the horizontal overlaps joint flashing 6 in.

Figure 3 siding 1 4 in. Joint flashing install starter strip over the weather barrier and even with the bottom of the sheathing. Cut the z flashing as needed using metal snips or a hacksaw. Do not caulk gap.

Between the roofing and the bottom edge of the trim. Keep water out of your home and running down the roof where it belongs with appropriate use of step flashing. Run the l shaped flashing up under the bottom row of siding so that it tucks under the final bottom row and on top of the wall and on top of the last row of bricks before you cap it with the. Slip in the flashing.

Maintain a minimum 1 in. Hardieplank siding with colorplus technology. Clearance between the bottom of james hardie products and horizontal flashing. Water resistive barrier install a starter strip hardieplank lap siding requires a starter strip beneath the first course to set it on the proper angle and to create a proper drip edge at the bottom of the siding.

Step flashing is used where a roof meets a. If the kick out and step flashing can t tuck behind the siding screw on cap flashing to cover it then caulk along the top.