La Mesa Roof Replacement with CertainTeed Shingles and Torch Down Flat Roof

This La Mesa roof replacement started with a common problem we see throughout older neighborhoods in the area. Over the years, the home had been re-roofed multiple times instead of properly stripped down.

When we began the project, we discovered three full layers of aging composite shingles installed over one another. That extra weight, combined with years of heat exposure, had compromised the performance of the entire roofing system.

Rather than adding another layer, we recommended a full tear off so the home could be rebuilt correctly from the decking up.

3 Layers of Composite Shingles

Once we removed the surface layer, it became clear why the roof was failing. Multiple layers trap heat, hide soft spots, and prevent proper ventilation. In La Mesa, where roofs take constant sun exposure, this shortens the life of the system significantly.

By tearing everything down to the wood decking, we were able to inspect the structure properly, check for damaged sheathing, and prepare the home for a modern roofing system built to last.

After the decking was exposed and inspected, we moved into the rebuilding phase. This is where long-term performance is determined. The materials underneath the shingles matter just as much as what you see on top.

New Underlayment and Low-E Insulation

We installed Low-E insulation and CertainTeed RoofRunner underlayment to improve energy efficiency and moisture protection. In La Mesa, attic heat buildup can be intense during summer months. Upgrading insulation helps reflect radiant heat and reduce stress on the roofing system.

The underlayment creates a critical moisture barrier beneath the shingles. It protects the home during heavy rain and provides an additional layer of defense against water intrusion.

Once the system was sealed and properly prepared, we moved on to shingle installation.

CertainTeed Shingle Installation

For the pitched roof sections, we installed CertainTeed shingles. CertainTeed is known for durability, wind resistance, and consistent performance in Southern California climates.

The new shingles provide a clean, updated appearance while delivering long-term protection. Proper installation, ventilation, and flashing details were all completed to current standards.

This ensures the roof performs correctly through both summer heat and seasonal storms.

In addition to the sloped roofing, this home also had a flat roof section that required a full upgrade.

Flat Roof with Cover Board and Torch Down System

Flat roofs demand a different approach. We installed cover board insulation followed by a new torch down roofing system.

Torch down systems create a strong waterproof membrane that holds up well in heat and protects against standing water. For La Mesa properties with flat sections, this is a proven and reliable solution.

With both the pitched and flat sections rebuilt properly, the entire roofing system now works together as one integrated structure.

Completed Roof System

The finished result is a fully rebuilt roof system with upgraded insulation, new underlayment, CertainTeed shingles, and a properly sealed flat roof membrane.

The home now has improved energy performance, reduced structural weight, and long-term protection built to handle La Mesa’s climate.

Roof Replacement in La Mesa

Many homes in La Mesa have older roofing systems with multiple layers or aging flat roof materials. A full tear off allows the roof to be rebuilt correctly from the decking up instead of layering over hidden problems.

If you need roof replacement in La Mesa, flat roof installation, or a professional roof inspection, McKay Roofing and Solar is ready to help.

Contact us today to schedule a free inspection and get clear answers about your roof.