Hardie Siding Installation 101 (Part 3)

Residential Artic White Artisan

Part 3 of our series on Hardie Siding Installation 101 focuses on the fastening methods of Hardieplank and how window and door trim should be installed. James Hardie Building Products requires strict adherence to their installation guidelines to qualify for their 30 year non prorated warranty.

Window & Door Trim Installation

All HardieTrim products will be installed with strict accordance to the manufacturer’s guidelines. This includes installing the Trim Boards in a 2-2-2-1 configuration. Hatch will also fully integrate our blind nail installation system on your project by using a combination of aluminum trim tabs, staples and finish nails.

Butt Joint Treatment

Hardie Siding must be installed so that the boards are in ‘moderate contact’ of one another. Where possible, ‘factory ends’ will be installed at butt joints and ‘field cut ends’ will be installed where siding meets trim/caulking. As mentioned previously, all cut ends will be sealed with a combination of paint and primer. Per manufacturer specs, Hatch will also incorporate color-matched aluminum butt flashing at every seam. No caulk will be used at the butt joints as this serves no functional value and will lead to an undesirable long-term aesthetic.

Fastening Method

Hatch Homes utilizes our blind-nail installation method on all of our Hardieplank jobs. There are three major downsides to face nailing siding & trim.

1) Face nails will cause ring shaped impressions throughout the façade This is a less than optimal aesthetic.

2) Every face nail creates an additional intrusion point for moisture to penetrate the siding and wall unit.

3) Face nails must be covered or patched with paint, caulk, etc. This introduces additional maintenance cycles.

Finish vs Face Nail Pinning

Face nails are occasionally required to ‘pin’ siding and trim. This is caused by minor framing imperfections that exist in some homes. Under these conditions, Hatch will use low-profile finish nails to make siding & trim flush with the rest of the exterior. Using face nails to pin siding & trim will lead to a less than optimal aesthetic and could potentially result in cracked/split corners of plank, panel & shingle.

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