Renovation of a multi-residential development in San Francisco, California. Completed plans call for the renovation of a multi-residential development.

Midtown Park Apartments Roof Replacement. Midtown consists of five 22-unit and one 30-unit apartment buildings encompassing one city block in the Western Addition. Roofs consist of asphalt built up roof covered with a single ply roof. Scope of work is to remove existing roofs and replace with a new roof with a 20-year warranty. The roof is part of a larger exterior upgrade of roofs, windows, waterproofing and painting. The LBE requirement for the entire project is 20%. Midtown Park is owned by the City of San Francisco and contracts must be prevailing wage. This project is subject to 14B administrative requirements and there is no bid discount or rating bonus. Midtown Park Apartments is requesting proposals from experienced roofers to replace the roofs at Midtown. Midtown Park consists of 140 units of affordable housing within six buildings encompassing one city block in the Western Addition neighborhood of San Francisco. PROJECT INFORMATION Owned by the City and County of San Francisco and managed by Kalco Properties, Midtown was built in the mid-1960s and has not undergone a major renovation. The total scope of work for the project includes installation of a new roof, window replacement, lighting upgrade and stucco and balcony railing repair. All work will be prevailing wage and subject to City hiring and contracting guidelines. SITE INFORMATION The site is located in the Western Addition neighborhood of San Francisco and is bounded by Divisadero Street, Geary Boulevard, O'Farrell Street and Scott Street. The site is comprised of six buildings surrounding an interior courtyard. Five of the buildings are identical and comprise 22 units each and one building has 30 units. ROOF SUMMARY The roofs are covered with a single-ply roof, over a single asphalt built-up roof on 4 buildings, and single-ply roof recover over two built-up roofs on 2 buildings. Our understanding is the single ply roof recovers were never intended to be a permanent roof and were installed as mid term/stop gap solution to leakage issues. The existing roof surface (the single ply recover) was reported to be 5 years old. The single ply roof on the surface on all the roofs appears to be in fair condition. Evidence of leakage and repairs were observed. The roof was terminated at the perimeter with a term bar at the perimeter rather than with coated metal. The ponding on the roof is prevalent with an adequate rain event one could expect standing water to be covering nearly 1/2 he roof surface. Roofs with little ponding and adequate drainage perform and last longer than those that do not. Single ply roofs generally are warranted for 20 years of service with proper drainage, the warranty may be voided on this roof. This roof has weathered through one quarter of its expected life with poor drainage. One should expect the roof to require significant maintenance short term or require replacement within 5 years. Replacing the roof properly with slope to drain is recommended if the goal is to have a roof with little to no maintenance and an intended lifespan over 20 years. SCOPE OF SERVICES: The roofer will work directly with the PM and CM. Construction Administration will be provided by an experienced roofing consultant. The scope of work includes. Roof Replacement 1. Remove existing roofs to the plywood roof deck and concrete curbs. 2. Replace rotted or moisture contaminated decking as needed 3. Refasten deck as needed 4. Install blocking as needed 5. Remove all flashings around penetrations and the stairwells. 6. Replace or add railings as required by owner. 7. Inspect the deck and curbs 8. Refasten as required or necessary 9. Add blocking as needed 10. Replace rotted lumber 11. Replace corroded fasteners 12. Remove residual asphalt on concrete curbs as needed 13. Repair concrete curbs as needed 14. Inspect drains and drain leaders 15. Replace the drains with drains with bowl extensions to allow for a sump free roof installation 16. Install vapor retarder as needed to protect the roof deck from inclement weather 17. Install adhered one layer min, R5 base insulation over entire roof deck 18. Install tapered insulation 1/4 inch per foot slope to drain. 19. Install crickets to drain 1/4 in per foot with 90 degree angles to drain forming 1/8 inch per foot min slope in the valleys 20. Raise curbs with level treated blocking with 200 stainless steel fasteners at perimeter to insure proper installation of tapered 21. insulation. 22. Install 1/2 gypsum cover board, dens deck or equal 23. Form sumps to drain double the roof slope 1/2 per foot 24. Install 6" 22 gauge G90 galvanized gravel stop perimeter edge metal conforming to current wind liftoff standards. 25. Install secondary scupper drains near existing drains conforming to current building code standards. 26. Install fully adhered base, ply and cap mod bit or optional 60 mil fleece backed PVC Roofing systems 27. Install walk pads at stairwell landing and as needed in other areas. 28. Install safety strips around perimeter of roof. 29. Paint metals, drip edges as required for aesthetics. 30. Install guard rails on buildings 1, 4 and 5. Questions Due: Wednesday, November 5, 2025 email to MichaelS@mspdi.com