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Attendance:

480-541-1002

Attendance:

480-541-1002

Sierra Roof Replacement

This page will be updated regularly with the most recent communications for families regarding Kyrene de la Sierra Roof Replacement.

Frequently Asked Questions

10.31.25 Update

Dear Sierra Community,

Roof construction at Kyrene de la Sierra is proceeding as scheduled and should be complete in the next two weeks. Once construction is finished, skylight installation will begin and should take two weeks. A deep cleaning and air quality retesting are scheduled for December. The full timeline is outlined below.

Kyrene Facilities and Technology teams will be working with Principal Gibson to coordinate the return of equipment and materials to the Sierra campus. This will include time for staff to pack up belongings and prepare for the move. If work remains on schedule, students will return to campus in January, for the start of the second semester.

I want to thank you again for your patience with this process. I know we had all hoped to move Sierra back to campus sooner, but I’m grateful there have been no further delays. We will continue to keep you updated on progress and will release final air quality testing results in December.

Sincerely,

Laura Toenjes
Superintendent


Sierra roof construction estimated* timeline: 

  • September:  
    • Finish demo, lay base and cap sheet
    • Detail all roof penetrations, curbs, and parapet walls.
  • Sep/Oct:
    • 30-day break (required time for 2 ply roof to cure)
    • Install parapet wall copping
  • Oct/Nov:
    • Spray coating (10 days)
    • 30-day break (required time for coating to cure)
    • Skylight installation
  • December:
    • Air quality re-testing
    • Full-campus deep cleaning
    • Move Sierra staff back in to building
  • January:
    • Students return to campus

*Various factors impact construction timelines, including weather delays. This timeline is approximate.

 

Comments/Questions

Previous Communications

Welcome Letters from Cerritos and Altadena

Frequently Asked Questions

This is not an exhaustive list of FAQs, but these are all of the questions that Kyrene is able to answer at this time.

 

Construction Completion Timeline*

  • September:

    • Finish demo, lay base and cap sheet

    • Detail all roof penetrations, curbs, and parapet walls.

  • Sep/Oct:
    • 30-day break (required time for 2 ply roof to cure)
    • Install parapet wall copping
  • Oct/Nov:
    • Spray coating (10 days)
    • 30-day break (required time for coating to cure)
    • Skylight installation
  • December:
    • Air quality re-testing
    • Full-campus deep cleaning
    • Move Sierra staff back in to building
  • January:
    • Students return to campus

*Various factors impact construction timelines, including weather delays. This timeline is approximate.

Mitigation Strategies

  • Air intakes have been sealed to prevent fumes from entering the building.
  • The filters in all air intakes and HVAC systems have been replaced.
  • Air scrubbers have been placed around campus to remove any particulates from the air. 
  • Air quality will be tested before students and staff return to campus.

Related Board Discussions

August 5
August 19

Reports/Additional Information

Asbestos Testing

Safety Data Sheets

Safety Data Sheets (SDS) provide important information about chemicals; what they are, how they should be handled, potential health risks and emergency procedures. NOTE: SDS sheets typically list exposures in parts per million (ppm), while the uploaded preliminary air quality testing results show units in parts per billion (ppb).
 

TRI-BUILT Flashing Cement 
TRI-BUILT Asphalt Primer 
POWERply Standard Cold Adhesive