Full Re – Roof due to Hail Damage

Project Information

  • ClientThe Joshua School
  • Category

When severe Colorado hail compromises a roof, standard repairs are rarely enough—especially on a property with the architectural complexity and historic charm of The Joshua School. Tasked with addressing extensive storm damage, B&L Roofing executed a meticulous, multi-phase re-roofing project, bringing the structure up to modern weatherproofing standards while preserving its classic aesthetic.

Phase 1: Mobilization and Safe Teardown

The sheer scale of The Joshua School required a highly organized job site setup. B&L Roofing deployed a heavy-duty JCB telehandler to safely hoist materials to the soaring rooflines, alongside massive roll-off dumpsters carefully staged to manage the immense volume of debris without disrupting the property grounds.

The job site fully staged with a JCB telehandler and large blue dumpsters.

 

Debris management on lower ledges and crew vans staged efficiently in the driveway.

 

The teardown process was rigorous. Crews safely harnessed themselves to strip away the hail-battered, decaying dark shingles from both the vast main slopes and the steep, multi-faceted historic turret.

Initial inspection and teardown of the historic turret’s spires.

 

Active tear-off process on the upper main roof.

 

Peeling back these damaged layers revealed the building’s original bones: a historic, solid wood plank deck that required careful inspection and extensive preparation before any modern roofing systems could be applied.

The stripped roof revealing the historic solid wood plank decking.

Phase 2: Reinforcing the Foundation (Substrate & Re-Decking)

To ensure the new roof had a flawless, code-compliant, and heavy-duty foundation, B&L Roofing installed fresh OSB plywood directly over the aging plank decking. The crew snapped precise chalk lines to manage the complex transitions between the old wood and new panels, ensuring structurally sound joints across the sprawling roof planes.

Chalk lines marking the transition between the old wood planks and fresh OSB.
Nailing down new OSB plywood safely alongside the brick chimney.

 

Complex roof valleys reinforced with seamless OSB decking.

 

The school’s flat and low-slope roof sections required entirely different technical systems. The team built up the low-slope foundations by laying thick, rigid white foam insulation boards to dramatically improve the building’s thermal efficiency.

Thick rigid white foam insulation installed on flat sections.

 

This insulation was then securely capped with Georgia-Pacific DensDeck Prime roof boards, fastened down to create a highly durable, fire- and impact-resistant substrate.

DensDeck Prime roof boards being installed over the insulation.

 

Another angle of the fully fastened DensDeck boards prepared for underlayment.

Phase 3: The Ultimate “Dry-In”

With the structural deck reinforced, the building entered the critical “dry-in” phase. B&L Roofing wrapped the steep main slopes in their high-performance, custom-branded CoverPro synthetic underlayment. This layer acts as the ultimate secondary water barrier.

The main sloped roof completely dried-in with red B&L underlayment.
Close-up of the securely nailed, branded CoverPro synthetic underlayment.

 

On the sharpest, most difficult angles of the spires, roofers carefully laid out underlayment and custom white drip edge flashing to protect the vulnerable edges.

Roofer installing black underlayment and custom white drip edge on the steep spire.

 

Concurrently, the flat roof sections were completely sealed with a base layer of dark, heavy-duty commercial membrane, rendering the entire building 100% watertight before the final surfaces were even touched.

Early stage dry-in of the low-slope roof area.
Fully sealed flat roof dry-in with metal strapping and black membrane.

Phase 4: Architectural Craftsmanship & Finishing Details

The final installation was defined by a commitment to both durability and aesthetics. The main roof structures were outfitted with premium, dark-hued architectural asphalt shingles that offered a striking, modernized contrast to the building’s painted stucco exterior.

The finished dark architectural shingles contrasting cleanly with the stucco.

Crews worked meticulously along the eaves and overhangs to integrate crisp white perimeter trim and custom metal edge flashing.

B&L Crew detailing the perimeter trim and flashing on lower overhangs.

 

Waterproofing the roof’s various penetrations was handled with expert precision. Brand new pipe boots and structural flashings were seamlessly integrated into the fresh shingle courses.

Fresh pipe boots and off-ridge vents fully integrated into the new shingles.

 

Where the building’s flat rolled-roofing sections met the steep slopes, the team executed a flawless physical transition, ensuring zero vulnerabilities at the seams.

A perfect, watertight transition between the flat membrane and shingled slope.

Additionally, complex geometric challenges—like the three-way ridges converging near the chimney—were beautifully sealed using specialized metal ridge caps.

Expert detail work at a complex three-way roof ridge near the chimney.
Cleanly installed main roof metal ridge cap flashing.

 

The crowning achievement of the project is the historic turret. Now fully restored, the spire is clad in pristine architectural shingles and accented by bold black metal seams running down every hip, standing as a testament to B&L Roofing’s dedication to quality.

Top-down view of the fully restored historic turret with black metal ridge covers.

 

From exposing the 100-year-old decking to installing the final ridge cap, The Joshua School is now fully guarded against Colorado’s harshest elements.

A final look at the beautiful, unified, and fully protected property.