What type of framing is used for ADU construction?

ADU construction uses conventional wood framing with dimensional lumber including 2x4 or 2x6 wall studs spaced 16 inches on center, engineered lumber like I-joists or LVL beams for floor and roof framing, and pressure-treated sill plates on foundation. Wall assemblies include double top plates, headers over openings, and blocking for structural integrity. Advanced framing techniques optimize energy efficiency while meeting California Building Code requirements including seismic bracing, shear wall anchoring, and proper connections verified during framing inspection.

How much does ADU framing cost?

ADU framing costs between $25,000 and $50,000 depending on square footage, complexity, and ceiling height. Standard 600-800 square foot ADUs with basic rectangular layouts average $30,000-$40,000 for complete framing including wall studs, floor joists, roof trusses or rafters, sheathing, headers, and hardware. Custom designs with vaulted ceilings, complex roof lines, multiple gables, or engineered lumber for large spans increase costs to $45,000-$65,000 including materials and labor.

What roofing materials are best for ADUs in California?

The best roofing materials for California ADUs include composition asphalt shingles (30-year architectural grade), standing seam metal roofing for modern aesthetics and fire resistance, concrete or clay tiles matching Mediterranean architecture, and TPO or modified bitumen for flat or low-slope roofs. All materials must meet Class A fire rating requirements. Underlayment includes synthetic moisture barriers, and installations require proper ventilation, flashing details, and compliance with Title 24 cool roof reflectance standards.

Do ADUs need fire-rated drywall?

Yes, ADUs require fire-rated drywall in specific locations including one-hour fire separation assemblies between attached ADUs and primary residences, garage ceiling assemblies if ADU is above, and areas within 3 feet of property lines. Type X fire-rated drywall (5/8-inch thickness) provides one-hour fire resistance rating. Standard 1/2-inch drywall suffices for interior walls and ceilings in detached ADUs meeting setback requirements. Pasadena Master ADU Builder ensures all fire-rated assemblies meet California Building Code Section R302 requirements.

What siding options are available for ADUs?

Available ADU siding options include fiber cement board like James Hardie or Allura providing durability and fire resistance, stucco offering traditional California aesthetic, engineered wood siding, vinyl siding for budget-conscious projects, vertical or horizontal board-and-batten, metal panel systems for modern designs, and brick or stone veneer accents. Material selection considers fire ratings, maintenance requirements, architectural compatibility with primary residence, climate durability, and Pasadena design review guidelines for visible ADU facades.

ADU Framing, Roofing, Siding, and Drywall Services in Pasadena, CA

Expert ADU framing, roofing, siding, and drywall in Pasadena determines whether your accessory dwelling unit withstands California weather, meets seismic codes, and passes rigorous inspections without callbacks or corrections. Pasadena Master ADU Builder delivers precise engineered lumber framing using LVL beams, Simpson Strong-Tie connectors, and shear wall assemblies that provide structural integrity, then installs asphalt shingle or cool roof systems with proper underlayment, flashing details, and ventilation to prevent heat buildup and water intrusion. We apply weather-tight fiber cement siding like James Hardie, LP SmartSide, or stucco with rainscreen technology and house wrap, then finish interiors with fire-rated drywall, taped seams, smooth texture, and corner bead installation that meets Title 24 and building code requirements.

We walk you through how our professional framing ensures load-bearing capacity, wind resistance, and proper header sizing, how our roofing choices balance durability with solar-ready infrastructure and energy efficiency, and how our siding and drywall deliver lasting moisture protection and polished interiors ready for paint. Expect clear timelines coordinating rough framing inspection, sheathing installation, dry-in milestones, and final drywall texture, material options suited to Pasadena's climate including thermal barriers and UV-resistant finishes, and answers to common questions about costs, permit coordination, and warranties as you explore our complete envelope and finish services.

Our Professional ADU Framing Services

We design and build ADU frames that balance structural strength, compliance, and long-term performance. Our focus covers engineered plans, material choices, and inspections that protect your investment and speed approval.

Custom Structural Design and Plans

We produce detailed framing plans tailored to your lot, roof type, and local Pasadena zoning limits. Each plan shows load paths, beam sizes, header locations, and wall bracing so permit reviewers and contractors can follow them without guesswork.

We coordinate with structural engineers when needed to size beams, specify holdowns, and address openings for large windows or second-story decks. This reduces change orders during construction and prevents costly field fixes.

We include foundation tie-ins and roof framing layouts that match the chosen roofing material. We also create wall sections and connection details for floor, wall, and roof intersections to ensure a predictable build sequence.

Material Selection and Modern Techniques

We select kiln-dried lumber, engineered lumber, and corrosion-resistant fasteners based on the ADU design and Pasadena climate. For long spans, we specify LVLs or I-joists to minimize deflection and maintain flat ceilings and floors.

We use platform framing for multi-story ADUs and integrate shear walls or engineered shear panels where seismic loads demand them. Moisture barriers, sill sealer, and flashing at roof and window interfaces limit water intrusion and wood decay.

We recommend treated or naturally durable materials at ground-contact areas and fastenings with stainless or hot-dip galvanized hardware in coastal-influenced zones. When appropriate, we include continuous exterior sheathing and taped seams to improve air and thermal performance.

Ensuring Code Compliance and Durability

We build to California Building Code and Pasadena municipal amendments and prepare documentation for permit submittal. Our plans identify code-required bracing, fire separation details, and insulation values so inspections proceed smoothly.

We perform staged inspections of framing, anchors, and tie-downs and document corrections immediately. This practice helps avoid rework and keeps schedules on track.

We also specify corrosion control, termite-resistant components where applicable, and roof-to-wall connections that meet wind and seismic load requirements. These choices extend service life and reduce maintenance needs for the ADU.

Expert Roofing Solutions for Accessory Dwelling Units

We design ADU roofs that balance durability, budget, and neighborhood aesthetics. We focus on material choice, weather resistance, and energy performance to fit Pasadena building codes and local climate.

Roofing Material Options

We select materials based on ADU size, pitch, and homeowner priorities. Asphalt shingles offer cost-effective installation and wide color choices. We use architectural-grade shingles for longer life and better wind resistance compared with 3-tab shingles. Metal roofing provides superior durability and a slimmer profile. We install standing seam or corrugated panels in galvalume or painted steel. Metal works well for low-slope roofs and sheds heat away when paired with proper underlayment.

Concrete and clay tiles match Spanish and Craftsman styles common in Pasadena. Tiles add weight so we verify framing and may reinforce trusses. Slate gives a premium look and 75 year-plus life span but requires structural support and higher upfront cost. We also offer synthetic slate and composite shakes that mimic natural products while reducing weight and maintenance. For small, modern ADUs, we can install single-ply membranes like TPO or EPDM for flat roofs.

Weather Protection and Longevity

We install code-compliant underlayment and ice-and-water shield where required to prevent leaks at eaves and valleys. Flashing gets custom-fabricated metal at chimneys, vents, and dormers to stop water intrusion. We seal all roof penetrations with durable boots and back them with proper counterflashing. Ventilation and drip edge detail extend shingle life by preventing trapped moisture.

We assess attic ventilation needs and add ridge vents, soffit vents, or powered vents as appropriate. We perform structural checks for rot, and replace damaged sheathing rather than patching. We offer warranties on both labor and manufacturer materials. We document maintenance recommendations including gutter cleaning frequency and inspection intervals to preserve the roof warranty and slow deterioration.

Energy Efficient Roofing Systems

We recommend cool roof options to reduce heat gain on south and west-facing planes. Reflective coatings for metal and cool asphalt shingles can lower attic temperatures by several degrees. For flat ADUs, we specify white TPO membranes which have proven high solar reflectance. We integrate insulation and air barrier details at the roof assembly to cut thermal bridging. Continuous insulation above the roof deck improves overall R value without sacrificing interior space. We coordinate with HVAC contractors to right-size systems based on measured infiltration and roof performance.

We can install solar-ready roofing or photovoltaic systems directly on new roofs. We place panels to maximize southern exposure and minimize roof penetrations. For tile or metal roofs, we use manufacturer-approved mounting systems to maintain weatherproofing and warranty compliance.

Quality Siding and Drywall Installation for ADUs

Exterior Siding Choices and Benefits

We offer fiber cement, vinyl, and engineered wood siding selected for Pasadena conditions. Fiber cement resists fire and rot, holds paint well, and matches many architectural styles. It requires minimal upkeep and provides long-term dimensional stability.

Vinyl siding provides cost efficiency and low maintenance. We select thicker gauge vinyl with proper flashing and continuous weather barrier to avoid air and moisture intrusion. We detail corners, window openings, and transitions to prevent leaks and reduce future repairs.

Engineered wood gives authentic appearance with treated substrates to resist pests and moisture. We sheathe with a weather-resistant barrier and install flashing at all penetrations. We coordinate trim, fascia, and painted surfaces to meet permit and neighborhood design guidelines.

Comprehensive Drywall Installation

We hang drywall with attention to framing tolerances and tight seams to reduce cracking over time. We choose gypsum board types by room. For bathrooms and laundry areas, we use moisture-resistant drywall. For garages or utility rooms, we select abuse-resistant panels when needed.

We square and fasten sheets to framing at specified spacing to prevent nail pops and warping. Taping and multiple coats of joint compound create a flat substrate. We sand to feather edges and inspect seams under natural and directional light for evenness.

We protect mechanical openings and coordinate with electricians and plumbers before final taping. We document panel layout to minimize seams at corners and load-bearing openings. This reduces callbacks and speeds painting or tiling.

Finishing and Interior Protection

We apply primer and backer treatments appropriate to the finish material to ensure long-lasting adhesion. For tile backsplashes and wet areas, we install cement board and set a waterproof membrane over seams. For painted walls, we use high-build primer on patched areas to equalize surface porosity.

We install corner beads, trims, and acoustic seals where required for noise control between units. We perform a final walkthrough with homeowners to identify touch-ups prior to handing off the space. We also provide maintenance recommendations and a written care guide for siding and drywall to help preserve the investment.

Frequently Asked Questions About ADU Framing, Roofing, Siding, and Drywall

What type of framing is used for ADU construction?
ADU construction uses conventional wood framing with dimensional lumber including 2x4 or 2x6 wall studs spaced 16 inches on center, engineered lumber like I-joists or LVL beams for floor and roof framing, and pressure-treated sill plates on foundation. Wall assemblies include double top plates, headers over openings, and blocking for structural integrity. Advanced framing techniques optimize energy efficiency while meeting California Building Code requirements including seismic bracing, shear wall anchoring, and proper connections verified during framing inspection.
How much does ADU framing cost?
ADU framing costs between $25,000 and $50,000 depending on square footage, complexity, and ceiling height. Standard 600-800 square foot ADUs with basic rectangular layouts average $30,000-$40,000 for complete framing including wall studs, floor joists, roof trusses or rafters, sheathing, headers, and hardware. Custom designs with vaulted ceilings, complex roof lines, multiple gables, or engineered lumber for large spans increase costs to $45,000-$65,000 including materials and labor.
What roofing materials are best for ADUs in California?
The best roofing materials for California ADUs include composition asphalt shingles (30-year architectural grade), standing seam metal roofing for modern aesthetics and fire resistance, concrete or clay tiles matching Mediterranean architecture, and TPO or modified bitumen for flat or low-slope roofs. All materials must meet Class A fire rating requirements. Underlayment includes synthetic moisture barriers, and installations require proper ventilation, flashing details, and compliance with Title 24 cool roof reflectance standards.
Do ADUs need fire-rated drywall?
Yes, ADUs require fire-rated drywall in specific locations including one-hour fire separation assemblies between attached ADUs and primary residences, garage ceiling assemblies if ADU is above, and areas within 3 feet of property lines. Type X fire-rated drywall (5/8-inch thickness) provides one-hour fire resistance rating. Standard 1/2-inch drywall suffices for interior walls and ceilings in detached ADUs meeting setback requirements. Pasadena Master ADU Builder ensures all fire-rated assemblies meet California Building Code Section R302 requirements.
What siding options are available for ADUs?
Available ADU siding options include fiber cement board like James Hardie or Allura providing durability and fire resistance, stucco offering traditional California aesthetic, engineered wood siding, vinyl siding for budget-conscious projects, vertical or horizontal board-and-batten, metal panel systems for modern designs, and brick or stone veneer accents. Material selection considers fire ratings, maintenance requirements, architectural compatibility with primary residence, climate durability, and Pasadena design review guidelines for visible ADU facades.