It is the goal of Lamfei Lin Builders to provide a quality product at the best possible price. All of the construction materials incorporated into each home built by Lamfei Lin Builders meet and/or exceed the minimum material quality standards required by the State of California Model Codes.
The following material list shows the minimum construction standards Lamfei Lin Builders established as a baseline for quality control necessary to provide a well-built, durable ADU for each client.
Framing and Rough Carpentry
- Exterior Walls – 2×6 No. 2 and Better, Moisture Content<19%
- Interior Walls – 2×4 No. 2 and Better, Moisture Content <19%
- Rafters – Varies, Depending on Plan – No. 2 and Better, Moisture Content <19%
- Ceiling Joists – Varies, Depending on Plan – No. 2 and Better, Moisture Content <19%
- Engineered Roof Trusses – Specified By Manufacturer
- Exterior Wall Headers – 6×4 No. 2 and Better, Moisture Content <19%
- Interior Wall Headers – 4×4 No. 2 and Better, Moisture Content <19%
- Roof Sheathing – 15/32” CD-X Plywood (5 Ply, PI=24/0)
- Exterior Wall Sheathing – 5/16” CD-X Plywood (3 Ply, PI=24/0)
Exterior Wall Opening Requirements
Windows and Exterior Glazed Doors (RATED FOR FIRE ZONES)
All windows and exterior glazed openings have a fire-resistance rating of not less than 20 minutes when tested in accordance to NFPA 257.
Exterior Doors (RATED FOR FIRE ZONES)
The exterior door assembly shall have a fire-resistance rating of not less than 20 minutes when tested in accordance to NFPA 252.
Electrical
- 150 Amp Subpanel (source of power from main residence electrical service panel) with code-required AFCI- and GFCI-protected wiring used to provide power to outlets, switches and lights
- Wiring – 12 ga. 2 conductor with ground for all power outlets and lighting
- 20 Amp power outlets throughout
- Electric outlets for Laundry appliances
- Indoor Lighting: Dimmable, ceiling-recessed LED lighting fixtures
- Outdoor Lighting: LED Motion Detectors
Plumbing
- Minimum 24kW, 4.68 GPM residential electric tankless water heater
- Dual-flush, comfort-height, low-flow toilets
- PEX water lines
- Laundry Hot and Cold water lines
- Shower Enclosure: Walls and floor – Quality tiles, hand-installed, fully grouted
- Bathroom vanity cabinet that matches the quality and style of the kitchen cabinets
- Moen Kitchen and Bathroom Faucets
Mechanical
- Heat-pump/mini-split system, remote controlled; One located in the living area(s) and One located in each bedroom
- Ceiling vented exhaust fan in bathroom
- Laundry electrical outlets – includes 220V for electric dryer
- Appliances – Combined smooth-top cooking surface with single oven, refrigerator and dishwasher (depending on size of ADU); model type depending on chosen Amenity Package
Exterior Finish
- Roof Covering – Class A fire-resistance-rated 30 year Composition Shingles
- Exterior Wall Covering – Class A, fire-retardant composite siding (cementitious), shipped-lap pattern (7/8” Stucco available with additional cost)
Interior Finish
- Insulation – Paper-backed R-19 Minimum between walls, R-38 minimum between rafters and R19 between ceiling joists
- Drywall – 5/8” Gypsum Board, smooth finish
- Flooring – Vinyl, available in three durability grades, depending on chosen Amenity Package
- Doors – Solid-core for sound deadening purposes
- Cabinets – Standard, or optional all-plywood construction, wood cabinets manufactured by American Woodmark, depending on chosen Amenity Package
- Countertops – laminate, solid surface or Quartz, depending on chosen Amenity Package.
- Interior Casing, Base and Molding – solid wood construction