What makes Boral trim different from standard PVC or cellular foam trim?

Boral TruExterior uses a fly ash and polymer composite that is denser than most cellular PVC products, which means it machines more cleanly and holds a nail or screw without the fastener pulling through over time as the material cycles through temperature changes.

How are end cuts handled to prevent moisture entry at exposed edges?

Every field cut is sealed with an end-cut sealer before the board is installed, which closes the composite material at the cut face and prevents the only pathway moisture has into a Boral board.

What happens to the existing wood trim during removal?

The existing trim is taken off carefully to avoid damaging the sheathing or housewrap beneath it, and the substrate is inspected before new trim is installed so that any soft spots in the wall assembly are identified rather than covered over.

Why do joints between trim boards matter for longevity?

Staggered joints distribute stress points along a trim run so that normal structural movement in a house does not concentrate at a single seam, which is the point where paint failure and gap opening most often begin on wood trim installations.

How does the finished installation look compared to the original wood trim?

The profiles and proportions of Boral boards are selected to match the existing trim dimensions on your house, so the replacement reads as a continuation of the original detail rather than a visible repair.

Boral Trim Installation

PNG Builders installs Boral trim for homeowners in Dayton whose wood trim has begun to split, cup, or soften at the edges—problems that are common in the older single-family and post-war ranch housing stock across the area, where original wood trim was installed decades ago and has reached the end of its practical life. Boral is a TruExterior material composed of fly ash and polymer, which makes it dimensionally stable in ways that paint-grade lumber is not. The result is trim that holds its profile, accepts paint well, and does not absorb moisture at the substrate level.

Installation involves precise field cuts at corners, casings, and fascia runs where dimensional accuracy determines whether gaps appear over time. PNG Builders measures and cuts each piece to fit the specific geometry of your exterior, including non-standard window sizes and angled rooflines that are frequently found in the mid-century homes throughout neighborhoods like Oakwood. Joints are staggered rather than butted straight, and all cuts are sealed before installation to prevent moisture wicking at exposed ends, which is the primary failure point on any trim board regardless of material.

Request an on-site evaluation to review the condition of your current trim and identify which sections require replacement versus repair..

The core difference between Boral and paint-grade wood trim is what happens at the cellular level when moisture contacts the material. Wood absorbs water, swells, and then contracts as it dries—that cycle causes paint to crack and the substrate to degrade. Boral does not absorb moisture in the same way, so the paint film holds longer and the board itself does not soften. This matters most at sill returns, band boards, and any horizontal trim run where water can pool even briefly before draining.

Once the installation is complete, the visible change is a trim line that stays crisp at the edges and corners without the raised grain texture that appears when paint-grade wood weathers. Caulk joints at the wall interface remain intact rather than opening up each year, which means the finished exterior looks consistent season after season rather than requiring repeated touch-up work. PNG Builders fits and installs each piece so that the profile aligns flush with window frames and door casings, producing a finished line that reads as intentional rather than patched.

Boral trim can be painted to match any existing exterior color, which makes it a practical replacement for sections of wood trim that cannot be salvaged without requiring a full exterior repaint. It is also available in profiles that replicate traditional millwork proportions, so replacing deteriorated wood trim with Boral does not require changing the architectural character of the house..

What makes Boral trim different from standard PVC or cellular foam trim?
Boral TruExterior uses a fly ash and polymer composite that is denser than most cellular PVC products, which means it machines more cleanly and holds a nail or screw without the fastener pulling through over time as the material cycles through temperature changes.
How are end cuts handled to prevent moisture entry at exposed edges?
Every field cut is sealed with an end-cut sealer before the board is installed, which closes the composite material at the cut face and prevents the only pathway moisture has into a Boral board.
What happens to the existing wood trim during removal?
The existing trim is taken off carefully to avoid damaging the sheathing or housewrap beneath it, and the substrate is inspected before new trim is installed so that any soft spots in the wall assembly are identified rather than covered over.
Why do joints between trim boards matter for longevity?
Staggered joints distribute stress points along a trim run so that normal structural movement in a house does not concentrate at a single seam, which is the point where paint failure and gap opening most often begin on wood trim installations.
How does the finished installation look compared to the original wood trim?
The profiles and proportions of Boral boards are selected to match the existing trim dimensions on your house, so the replacement reads as a continuation of the original detail rather than a visible repair.

Trim That Stays Straight and Solid