A roof warranty should help you understand who is responsible if a problem appears after installation. TNS Contracting provides a 10-year workmanship warranty on full roof replacements; terms vary by material and scope. The written documents for your project explain the coverage that applies to your roof.
What a 10-year workmanship warranty means
A workmanship warranty relates to how the roofing system was installed within the approved scope. In plain language, it addresses qualifying problems caused by the installation work performed by the contractor. It does not mean that every leak, damaged component or change to a roof during the next ten years is automatically covered.
Coverage begins with a complete, documented roof replacement in Surrey because the contractor can assess the exposed deck, install the agreed system and control the important transitions included in the scope. A small repair on an older roof is different: surrounding materials, previous work and hidden conditions remain outside the repaired area.
Manufacturer product warranties are separate
Roofing manufacturers may provide warranties for shingles, membranes, metal panels or other products. Those warranties are issued by the manufacturer and governed by its requirements. They can address qualifying product defects, but they do not replace the contractor’s workmanship warranty.
Your project may therefore have two different forms of protection: manufacturer coverage for eligible products and TNSC workmanship coverage for eligible installation issues. Each has its own terms, documentation, responsibilities and exclusions.
Why warranty terms vary by material and scope
No two roofs are identical. The written warranty reflects the assembly selected and the work approved for the property as part of our full roof replacement service. Common factors include:
- Roofing material: asphalt shingles, metal and low-slope membranes use different components and installation methods.
- Roof complexity: valleys, skylights, chimneys, wall transitions and multiple roof levels create different detailing requirements.
- Ventilation: inadequate intake or exhaust ventilation can contribute to heat and moisture conditions that shorten roof life.
- Existing construction: connected walls, drainage, rooftop equipment or components outside the replacement scope can affect performance.
- Maintenance: blocked drainage, debris, moss, unreported damage or neglected sealants can allow avoidable deterioration.
- Later work: satellite, solar, HVAC or other contractors may alter or penetrate a completed roof.
Examples of what may be covered
Subject to inspection and the written project terms, a workmanship review may apply if flashing installed as part of the replacement was not secured or integrated as specified, or if a qualifying installation detail within the approved scope allows water entry.
For example, if a new full replacement develops a leak at a contractor-installed roof transition and inspection confirms the installation is the cause, that may fall within workmanship coverage. Similarly, an installation-related issue with an included vent or flashing detail may qualify.
Examples of what may not be covered
Storm damage, falling branches, animal activity and normal weathering are not workmanship defects. Damage caused when another trade cuts or fastens through the roof after completion may also fall outside coverage. For multi-unit buildings, written coverage is tied to the approved strata roof replacement planning scope.
A leak from a wall, window, chimney component or rooftop system that was excluded from the replacement scope is another example. Likewise, deterioration linked to blocked drains, heavy debris or maintenance that was not completed may not qualify. These examples are general; the signed warranty documents control.
How homeowners can protect their coverage
Keep your proposal, invoice, final photographs, manufacturer documents and written workmanship warranty together. Follow the maintenance guidance for the selected system, keep gutters and drains clear, and arrange safe inspections after severe weather or rooftop work. Report concerns promptly rather than waiting for moisture to spread.
Review the warranty for your Surrey roof
TNSC serves homeowners, strata councils and property managers in Surrey and across the Lower Mainland of BC. Because roof materials, design and project scopes differ, the best time to understand coverage is before approving the work. Contact TNS Contracting to review warranty options and request the full written details for your specific roof.