REQUEST FOR BIDS Hillside Terrace Attic Air Sealing & Insulating Project

Transcription

1 March 2013 REQUEST FOR BIDS Hillside Terrace Attic Air Sealing & Insulating Project The Burlington Housing Authority (BHA) is inviting Contractors to submit Bids for the Attic Air Sealing and Insulating at Hillside Terrace, Burlington, VT. Hillside Terrace is comprised of 13 Duplex apartment Buildings totaling 26 apartments. Abbreviated Written Summary: Briefly and without force and effect upon the contract documents, the work of the Contract can be summarized as follows: Contractor shall provide all labor and materials to perform all work listed below: A. Air seal, insulate, repair gypsum board and remediate mold in 26 attic spaces as follows: REPLACEMENT LIGHTING: Provide a $13,000 allowance for the following Replacement Lighting Work: Replace 2 nd floor recessed closet lights with new surface mounted energy star rated light. Contractor shall remove existing recessed light, install new single gang box in ceiling and patch ceiling gypsum board around box, add texture and paint to match existing. New light will be chosen by BHA and wired and installed by contractor. Approx. Two (2) lights per apartment totaling Fifty Two (52) site wide. AIR SEALING: All air bypasses into the attic shall be sealed air tight. Attic air sealing must address all penetrations or wiring, plumbing vent stacks, attic hatches, surface mounted ceiling fixtures, recessed lighting fixtures, exhaust fan assemblies, chimney/flue chases, partition walls, exterior walls, merger walls between adjoining building sections, and all other miscellaneous penetrations. This shall be done be removing/pulling back existing insulation around all penetrations and treating each with an air sealing foam spray product. A single component low expansion polyurethane foam or a expanding, 2-part polyurethane foam is acceptable for sealing most penetrations. The foam shall be a Class 1 fire retardant, meeting ASTM E84 Surface Burning Characteristics. The foam shall be installed per manufacturer specifications. Seal with (Touch n Seal Quick Cure or (Touch n Seal FR Two Component Class 1 Fire Retardant Spray Foam. The exterior wall tops shall be sealed using an expanding, 2-part polyurethane foam,

2 sprayed on both outer and inner top plates. This includes both gable and eave edges of the building. The foam shall be a Class 1 fire retardant, meeting ASTM E84 Surface Burning Characteristics. The foam shall be installed per manufacturer specifications. Seal with (Touch n Seal FR Two Component Class 1 Fire Retardant Spray Foam. DAMS: A durable wooden plywood (5/8 thick min.) insulation dam shall be installed around all attic hatch openings. The dam must extend at least 2 higher than the settled insulation depth at the completion of the weatherization project. On the front of the buildings where the eaves extend beyond the top plates a durable wooden insulation dam shall be installed beyond the top plate to prevent insulation from getting into the eaves. ATTIC HATCH: Install 3-2 layers of XPS Rigid Foam Insulation (Extruded polystyrene) to the top of existing attic hatch panels and to each other with Loctite PL 300 VOC Foam Board Adhesive. Tape all edges of foam board with aluminum tape to cover all seams. Install a rubber compression gasket to the under side of the attic hatch to form an air seal when hatch is dropped into position. VENT EXTENSIONS: Install all new foam baffle vents. Each baffle must be installed in a manner that will protect the attic insulation from both intrusion and wind washing. This can be achieved by securely fastening the baffle to the underside of the roof and then either placing a piece of rigid foam board or rolled fiberglass beyond the exterior top plate. The foam board would be sealed in place at the edges with foam, and the fiberglass batt would be sprayed and covered with the 2-part foam while spraying the top plates. This will prevent wind wash and insulation from getting into the eaves. The perimeter top plates must still be sealed with a 2-part, closed cell foam. Vents must extend at least 2 higher than the settled insulation depth at the completion of the weatherization project. PERIMETER PULL: Any preexisting fiberglass batting shall be removed from within 4 feet of the perimeter of the attic. This insulation can be used to roll up and block soffits, or can be added on top of existing insulation in the center of the attic. Once the perimeter is cleared of fiberglass and all attic air sealing measures are complete and verified to be effective, blown-in insulation must be installed around the attic perimeter and over the fiberglass batting throughout the rest of the attic. INSULATION:

3 The minimum effective R-value at project completion shall be R-60. If roof clearance does not allow for an R-60, insulation must be added up to the roofline. All air sealing measures must be complete before installing new insulation. Existing conditions in buildings are 6-10 of various insulation (cellulose, fiberglass battings with cellulose, blown fiberglass). Install an average of 14 additional cellulose over existing insulation. PARTY WALLS: The party walls shall be drilled to accept an insulation blowing tube. Dense pack all party wall cavities with cellulose to a density of 3.5 pounds per cubic foot. This will provide insulation and reduce air infiltration within the cavity. Repair holes in gypsum board. CLOSET SLANTS: Each of the closets above the front entry way has a slanted ceiling. This slant is insulated with fiberglass batting. A rigid insulation blowing tube shall be pushed down the slant over the fiberglass batting to dense pack each cavity with cellulose. If vent baffles are existing in cavities, it is acceptable to block the airflow when dense packing with cellulose. BUMPOUTS: Front bump outs are open and accessible for work. Air seal any penetrations as normal. Dense pack accessible wall cavities. Once general air sealing and dense packing of walls is complete, cover cavity over bump out with a building wrap or 6 mil poly sheeting sealed at the edges with foam. The cover can be held in place by strapping. Dense pack the cavity through a hole in the cover, and seal hole with foam. Side bump outs will need to be accessed from either through the exterior siding or through the interior. These should dense packed with cellulose. Contractor has the option to perform this work from the interior or exterior. Interior or exterior building components damaged due to this work shall be restored to the exiting condition. Back bump outs are accessible from the attic, but with very little space due to the slope of the roof. As much effort to air seal using foam should be made. The best option here would be to dense pack the cavity from the attic.

4 MOLD REMEDIATION: Spray all visible mold located on roof decking and framing with Moldstat plus mold killer product per manufacturer s instructions. Black mold is visible in several attic areas with approx. square footage as follows: Apt #34 10 sq ft Apt #47 50 sq ft Apt #49 24 sq ft Apt # sq ft Apt #72 60 sq ft Apt #73 20 sq ft Apt #81 15 sq ft Apt # sq ft Apt #83 10 sq ft DRYWALL REPAIR: Patch all holes in attic party wall gypsum board created for the installation of blown cellulose in wall cavity. Re-tape (Fire Tape) all seams in attic party wall gypsum board that are failing. Approx. 48 linear ft. per apartment. Patch holes in gypsum board ceilings/walls in 2 nd floor closets due to the replacement of closet lighting. See Replacement Lighting above. Base Bid: Furnish all material, labor and equipment to perform all work in apartment attics as described above. Base Bid to include $13,000 lighting allowance. General Conditions Contractor is responsible to obtain and pay for all required Building Permits & Inspections. Note: Thirteen (13) separate Building Permits may be required for this project. Contractor is responsible to ensure areas under construction are controlled to ensure the safety of the residents. Contractor is responsible for the proper protection of all BHA/Tenant property. Any and all damage to said property shall be replaced at Contactors expense. All contractors will be required to supply proof of Workman s Comp and Employer s Liability Insurance. All Debris must be removed from premises at the end of each day. Working hours for this project shall be between 8am-4:30pm Monday thru Friday. Contractor shall submit a project schedule prior to beginning the project and work with BHA to coordinate access to apartments. Coordinate 48 Hours notice to access Apartments with BHA Staff. Contractor shall provide all electrical power required for the project utilizing generators. Contractor shall provide temporary toilet facilities.

5 Attention is called to: Attached HUD General Conditions for small construction/development contracts Attention is called to: Attached Section 3, Women & Minority Business Concern. Attention is called to: Attached Davis-Bacon Labor Standards and Wage Provisions. Contractor will be required to submit attached form: DOL WH 347-Payroll information. Additional forms may be required based on HUD Guidelines. Bids will be received at the offices of the BURLINGTON HOUSING AUTHORITY at 65 Main Street, Burlington, Vermont until March 26 th, A Pre-Bid Meeting will be held at 10am on Tuesday March 19th, 2013 at Hillside Terrace, Burlington, Vermont. BHA will meet contractors at the parking lot near the playground at which time bidders are invited to inspect some of the apartments and attic spaces. The BURLINGTON HOUSING AUTHORITY reserves the right to accept or reject any or all Proposals, or to waive informalities or minor irregularities in the bids received and to seek clarification of bid documents and pricing. Award of contract shall be made to the responsible bidder whose bid will be most advantageous to the Authority. The successful bidder will be required to provide an assurance of completion. No Proposal shall be withdrawn for a period of Thirty (30) days subsequent to the opening of bids without consent of the BURLINGTON HOUSING AUTHORITY. The successful bidder shall be prepared to start the work as soon as possible after the Notice to Proceed and complete the entire installation within 60 days. Inspection of the property may be arranged by appointment. Please contact John MacDonald at (802) , ext. 224 to schedule a date and time for a site visit and to study the Project requirements or John at jmacdonald@burlingtonhousing.org. Questions concerning this project shall be directed to the Burlington Housing Authority office at 65 Main Street, Burlington, Vermont. BURLINGTON HOUSING AUTHORITY Paul Dettman, Executive Director March 11, 2013

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