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City approves $8.8M for Central High roof; district warns mechanical upgrades could push costs far higher
Summary
Staff said the city approved $8.8 million for Bristol Central High’s roof (roof-only) and that mechanical replacements are critical because existing equipment uses obsolete refrigerant; facilities staff warned full replacements, electrical upgrades and other soft costs could produce multi‑million‑dollar estimates and stressed sequencing and warranty concerns.
District facilities staff told the board that the city approved $8.8 million for the Bristol Central High School roof (the funding covers roof design and replacement only) and that Bristol Eastern’s roof and mechanicals are scheduled in a future CIP cycle with an estimated soft-cost request of about $3.2 million.
A facilities presenter (identified in the discussion as Pete) told the board rooftop mechanical units rely on R22 refrigerant, which the market no longer supports in the volumes previously available; the district has effectively missed the supply transition window (past replacements used 410A, and newer refrigerants such as 454 are now in play). He said a failure of rooftop units could severely degrade indoor environmental controls, because the current systems combine DX coils and steam coils and the district depends on these rooftop units for fresh-air handling.
The presenter described sharp increases in mechanical costs since pre-pandemic estimates—previously about $30 per square foot for mechanicals and now well over $100 per square foot—and noted that a full replacement package could require electrical switchgear upgrades and other soft costs, which is why combined project estimates discussed in the meeting were in the tens of millions. Board members asked whether reroofing now and adding mechanicals later would force rooftop penetrations that could affect warranties; facilities staff said warranty language will be reviewed and that the district will specify higher-performance roofing membranes but could face warranty exposure and additional cost if rooftop work is repeated.
Why it matters: aging mechanical systems and changing refrigerant supplies create both operational risk and significant potential costs; decisions about whether to pursue roof-only work now or combine roof and mechanicals will affect project budgets, scheduling and building performance.
Next steps: staff said they will proceed with design and advocate for funding in the CIP process and to the city, prepare RFPs after design, and continue discussing sequencing and warranty language with engineers and procurement.
