PHASE SPECIFIC SCOPE OF WORK
CalAtlantic Homes - Baltimore Division
Updated for 2006
Updated for IECC 2012 - 5/22/13
64040 Insulation
Subcontractor: ______
Job: All Projects
I. Detailed Scope
A. General Installation
1. All tears in the insulation vapor barrier must be repaired with tape.
2. The Subcontractor must supply CalAtlantic with insulation to give to the mason before brick fireplace facings are installed and to the plumber for behind garden tubs when not pre installed by the panel manufacturer. It will be the mason’s and the plumber’s responsibility to install the insulation in these locations.
3. Any gaps in framing greater than 1” is to be chinked with insulation, gaps between 1/8” and 1” to filled with one part foam, up to 1/8” must be caulked. Caulking the framing will provide little or no air sealing benefit. It just looks pretty.
4. Insulation must be tucked neatly in the wall cavity and not be excessively compressed. Compressed insulation should be removed, trimmed and reinstalled.
5. Insulation of framing that has plumbing located in it must be such to ensure that the plumbing will not freeze during excessive cold spells. Where possible, insulation should be between the sheathing and the pipe. In tight areas the insulation may be split.
6. The plumber shall move pipes to the warm in winter surface, within 1.5” of the drywall or subfloor.
7. Where it is not possible to insulate behind the plumbing the condition should be brought to the attention of the CalAtlantic Homebuilding Supervisor for consideration of plumbing relocation. Under no circumstances is this area to be covered until the issue is satisfactorily resolved.
8. Insulation should never be installed over plumbing on the warm side of the structure so as to prevent warm air from reaching the plumbing.
9. If required, foil backed insulation is to be installed behind the furnace in unfinished areas.
10. The Subcontractor must remove all excess insulation and debris from the home upon completion of the work.
B. Roof/Ceiling Systems
1. Cathedral ceilings will use a 12” and a 3 ½” craft faced batt with vapor barrier down for a total factor of R-49.
2. Ceiling blown-in insulation shall be rockwool, fiberglass, or cellulose installed to the depth necessary to meet code requirements. Cardboard rulers must be installed in the attic area at a rate of one (1) per 100 sq. ft. to adequately show that the correct level of insulation has been achieved. The Subcontractor must also install 48” baffles to ensure proper attic ventilation and stabilization of blown insulation.
3. Attic cards are to appear on the side of the truss inside the access opening. The Subcontractor must assure that the card is firmly attached and easily viewed from the room below. Houses with multiple accesses must have a card at each opening.
4. Only large open flat attic areas can be blown. Ceilings with difficult access should use Batt insulation to insure that the area is insulated.
5. The Subcontractor must install batt insulation and weatherstripping on the attic access panel and reinstall the panel.
6. The Subcontractor will install insulation over all fire sprinkler pipes by tenting in order to protect the pipes from freezing.
7. The Subcontractor will automatically return to blow the attic ten (10) working days, or at the direction of the CalAtlantic Homebuilding Supervisor, after first insulation.
8. After the completion of the 1st insulation phase, the site Forman shall check off the appropriate boxes and sign off as complete the pre-drywall inspection form. The form will be posted in the window by the CalAtlantic supervisor.
C. Exterior Frame Wall Systems
1. Exterior frame walls will use a 3 5/8” x 94 ½” kraft faceed compressed batt to achieve a R-15. This includes all exterior framed walls in lower levels and split foyers. 9’ plate homes will use a 106 ½” batt.
2. Insulation is to be installed flush with framing.
3. Subcontractors will use staple free insulation to maintain six-sided contact to allow for drywall glue to be placed on the face of the studs.
4. Ring joists will be insulated with a 3 5/8” compressed batt to achieve a R-15.
5. Insulation must be stuffed around all exterior wall penetrations, such as wires and pipes, and must be stuffed behind all exterior wall outlets.
6. Insulation must be foamed around all doors and windows with window rated foam to minimize air infiltration, but as not to interfere with window and door operation. Smaller gaps should be caulked. Expanding foam may not be used on any windows or doors.
7. The Subcontractor will install chink insulation with flame resistant fiberglass at the Corewall/Partywall where it meets the front and rear framed wall and at any first or second floor deck level. The gap at the exterior boundary should be sealed with foam. The space between floors can remain as thermal fiber
8. The vertical framing on the sides of skylight openings are to be wrapped with 6” insulation with the integral Kraft face toward the open side of framing to achieve a R-19. These walls should be treated same as knee walls. An attic side air barrier if insulation. If the cavity is less then 3.5” then install rigid insulation board to achieve at least R-10
D. Basement and Floor Systems
1. Building overhangs, cantilevers, and floors over unheated crawl spaces and garages will use a 10” Batt to achieve a R-30. Building overhangs and cantilevers shall be 10” Batts to achieve a R-30 rating. Or fill the cavity to ensure insulation touches the floor above.
2. Garages below conditioned space will use a 10” Batt in the ceiling to achieve a R-30.
3. Interior penetrations between floors and chases must be draft stopped.
4. All exterior concrete walls must be covered with FS-25 from the top of the wall to 3” from the slab, including below grade conditions. All joints on FS-25 must be taped.
5. All window and door openings in an unfinished basement must be returned and taped with aluminum tape.
6. The Subcontractor will automatically return to insulate the basement thirty (30) working days, or at the direction of the CalAtlantic Homebuilding Supervisor, after the first insulation.
Optional “Framed Rear Foundation Wall” must get a foil wrap (R15) if the lower level is unfinished.
II. Materials Specified
1. Owens-Corning Insulation
2. Knauf Insulation
3. Johns Manville Insulation
III. Energy Seal
Contractor will airseal items to comply with 2012 IECC. All foaming will be completed using 1 part draft stop rated orange foam.
a. Foam seal the sill plate.
b. On townhouse units, seal the joist bays where garage ceiling meets living space (seal ribbon between garage and joist bays)
c. Foam around and behind all electrical outlet boxes at exterior walls. Could violate UL label for the outlet box when foam enters the box through knock outs. This does not affect the building leakage. Is not required when air sealing occurs at the plywood sheathing.
d. On townhouses, foam bottom plate at slab/ foundation wall.
e. Subcontractor shall ensure all windows and doors are sealed with window rated foam.
f. On townhouses, foam inside each exterior stud cavity, at top And bottom. ???
g. “Picture Frame” all bands. Top and bottom is necessary
h. Foam behind studs in partywall- minimum every 10 feet. Is this a fireblock
i. Foam seal partition wall floor line at top & bottom. Does thermal fiber address this requirement for draft blocking
j. Draft stop all penetrations between floors.
k. Foam all interior outlets on top floors. Move air seal to attic and seal top plates
l. Caulk all corners & double studs where insulation & foam are not used.
m. Seal gaps in attic where drywall meets interior wall top plate.
n. Install rigid material to cover insulation at cantilevers and picture frame material with axpanding foam.
o. Sheath all attic wallsand install rigid insulation where pags occur and seal to existing sheathing.
p. Cover all exposed insulation on outside walls with an approved air barrier and seal all edges of the barrier.
q. Plywood installed in all framing voids and bulkheads connected to attics. Air sealing material picture frames the plywood and seals gaps at seams.
2. Knauf Insulation
3. Johns Manville Insulation
4. Touch-n-Seal foam products
IV. Standards/Warranties
1. The Subcontractor must guarantee all labor and material for one (1) year after settlement. If field inspection reveals improper material or workmanship, the Subcontractor will assume all liability for any future charges incurred in the correction of this work.
I:\BIDPROPS\SPECS\INSULATE.DOC 05/95 (rev. 1.1 12/31/96)
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