Putting Trim Over Siding Gap

The main difference in the installation instructions from glancing through them both is that the hz10 product is permitted to have the trim installed over the siding while the hz5 product is not.

Putting trim over siding gap.

Figure 14 flashing over trim do not caulk along top edge hardietrim board water resistive barrier siding 16 in. 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. This works fine most of the time but always add a few blobs of caulking inside the bottom lip of the top course for extra security. The rain screen battens are run down to the top of the window flange.

On most new homes the trim goes up after the siding is installed which creates a large gap that should not be caulked. Leave a minimum 1 8 in. If the trim is being applied over the hardi panels. Apply caulking compounds rated for exterior use when caulking window trim.

It takes a lot of talent to make sure you don t shoot to much caulk inside the trim and they et caulk it perfectly flush with the trim using a special technique. The most common approach here is to install sill trim at the soffits rip down the top course of siding and crimp the siding so the sill trim holds it in place. I guess it s a new trade since they nail exterior trim over the siding with 7 16 gaps. The cement board panels are fastened to the battens.

Trim boards that sit on top the siding. The first is your moving the siding of the house about 3 4 of an inch outward. On tight gap there s no tongue so face nailing is the only option. During my time working for james hardie i very rarely got calls from homeowners that wanted to submit a warranty claim for their hardie siding.

At the top we install a trim piece either crown molding or a flat stop to close the gap. There are a few things that you ll need to know when doing this however. V joint or 45 degree shiplap is a little trickier. The head flashing is installed in a bed of caulking onto the top of the window frame.

While tight gap siding can be installed from the top down we usually run it from the bottom up. Last edited by jerry peck. Butt to siding trim the opening prior. Gap between siding and trim then caulk.

The wrb is lapped over the head flashing or the flashing is taped. In the old days the builder would install the trim bring the siding up to it and caulk the corner. Follow your window door manufacturer s installation instructions for caulking guidance between window and trim.