Exterior Wall Assembly Systems: Weather Barriers, Cladding Support Systems & Insulation
Product Overview:
Building Envelope Contractor for Complete Wall Preparation Systems
Cladders is a building envelope contractor specializing in exterior wall assembly systems from the sheathing or concrete block outward.
Before panels, siding, or façade materials are installed, the wall assembly must be properly prepared to control water, air leakage, vapor movement, thermal bridging, drainage, and long-term durability.
We design, supply, and install weather barriers, air barriers, vapor control layers, exterior insulation, thermal breaks, and cladding support systems for residential, commercial, industrial, and institutional projects throughout Toronto, the GTA, and Ontario.
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Complete Wall Preparation Before Cladding Installation
A high-performance building envelope is much more than the exterior finish.
Modern wall assemblies require multiple components to work together as one coordinated system, including:
- Weather barriers and air barriers
- Vapor control layers
- Primers and transition membranes
- Flashing and penetration detailing
- Continuous exterior insulation
- Thermal breaks
- Cladding support systems
- Secondary framing
- Rainscreen cavities
- Ventilation and drainage components
- Cladding attachment systems
At Cladders, we do not treat these components as isolated products. We coordinate them as one complete exterior wall assembly to support the long-term performance of the finished façade.
Weather Barrier & Air Barrier Systems
Proper moisture management begins with the weather barrier.
We install complete weather barrier and air barrier systems designed to provide air tightness, water management, and long-term durability.
Our systems include:
Mechanically Attached Membranes
- Building wraps
- Vapor-permeable membranes
- Drainable wraps
- Flexible sheet air barriers
Self-Adhered Membranes
- Peel-and-stick membranes
- Vapor-permeable membranes
- Vapor-retarding membranes
- Vapor-impermeable barriers
Fluid-Applied Systems
- Liquid weather barriers
- Fluid-applied air barriers
- Vapor-permeable coatings
- Vapor-retarding systems
Specialty Systems
- Closed-cell spray foam air barriers
- Boardstock air barrier systems
- Hybrid sheet and liquid-applied assemblies
Every project is different, and the correct system depends on substrate conditions, exposure, insulation strategy, fire requirements, and the final cladding system.
Flashing, Primers & Transition Detailing
Many building envelope failures occur at penetrations and transitions—not in the field of the membrane itself.
That is why Cladders pays close attention to the details.
Our systems include:
- Primers
- Window flashing
- Door flashing
- Transition membranes
- Flashing tapes
- Liquid flashing
- Sealants
- Mastics
- Joint fillers
- Seam treatment
- Expansion joint membranes
- Preformed corners
- Penetration detailing
- Drainage mats
- Vent strips
- Bug screens
- Cavity ventilation accessories
These components create a continuous air, water, and weather-control layer behind the cladding.
Exterior Insulation Systems
Continuous exterior insulation improves energy efficiency while helping reduce thermal bridging.
Cladders supplies and installs insulation systems for new construction, recladding, and building envelope retrofit projects.
Mineral Wool & Stone Wool
- Non-combustible insulation
- Rigid mineral wool boards
- Semi-rigid rainscreen insulation
- High-density exterior boards
- Black-faced mineral wool for open-joint cladding
Rigid Foam Insulation
- Polyiso
- EPS
- XPS
Spray Foam Systems
- Closed-cell spray foam
- Hybrid insulation assemblies
- Specialty applications
Every project requires a different insulation strategy based on:
- Fire requirements
- Thermal performance
- R-value targets
- Wall depth
- Moisture management
- Budget
- Cladding type
- Attachment systems
Thermal Break Systems
Modern wall assemblies require support systems that minimize thermal bridging.
Cladders works with:
- Thermal clips
- Fiberglass spacers
- Composite clips
- Thermally isolated brackets
- Thermal pads
- Intermittent support systems
- Thermally broken rail systems
- Clip-and-rail assemblies
Our goal is to maximize building envelope performance while maintaining structural integrity.
Cladding Support Systems & Secondary Framing
The support structure behind the cladding is just as important as the insulation itself.
Cladders designs and installs complete cladding support systems that provide:
- Structural support
- Ventilation cavities
- Drainage space
- Alignment and adjustability
- Thermal efficiency
Our support systems include:
Sub-Girts & Channels
- Z-girts
- Z-bars
- Hat channels
- Top-hat channels
- Metal furring channels
- Wood strapping
- Treated wood furring
Rail Systems
- Vertical rails
- Horizontal rails
- Secondary rails
- L-rails
- T-rails
- Omega profiles
- U/Z profiles
Advanced Façade Support Systems
- Clip-and-rail systems
- Thermally isolated brackets
- Adjustable façade support systems
- Cassette support systems
- Concealed hanger systems
- Rear-fixed panel systems
- Undercut anchor systems
- Masonry tie-compatible support systems
These systems are commonly used behind ACM panels, metal siding, fiber cement panels, HPL panels, porcelain panels, wood siding, Longboard systems, and other rainscreen cladding assemblies.
Rainscreen Wall Assemblies
A rainscreen wall assembly provides drainage and drying behind the cladding rather than relying on the exterior finish alone.
Typical assemblies include:
- Exterior cladding
- Ventilated cavity
- Cladding support system
- Thermal break system
- Continuous insulation
- Weather barrier or air-water barrier
- Sheathing or structural backup wall
Cladders designs and installs rainscreen assemblies that improve durability, moisture management, and long-term performance.
From Sheathing or Concrete Block Outward
Our scope typically begins at the backup wall and continues outward.
Depending on the project, our work may include:
- Substrate preparation
- Primer application
- Weather barrier installation
- Air barrier detailing
- Flashing and transition work
- Exterior insulation installation
- Thermal break installation
- Cladding support systems
- Secondary framing
- Rainscreen cavity preparation
- Cladding attachment systems
This allows owners, developers, architects, and general contractors to work with one contractor for complete wall preparation before the final cladding installation.
New Construction, Recladding & Building Envelope Retrofit
Cladders supports:
New Construction
- Commercial buildings
- Institutional projects
- Industrial facilities
- Multi-residential buildings
- Custom homes
Recladding & Building Envelope Upgrades
- Existing building renovations
- Envelope rehabilitation
- Overcladding projects
- Energy retrofits
- Moisture remediation
- Wall assembly upgrades
Cladding Systems We Support
Our wall assemblies are compatible with:
- Aluminum composite panels (ACM)
- Aluminum plate panels
- Metal siding
- Corrugated metal panels
- Standing seam systems
- Fiber cement panels
- HPL panels
- Longboard systems
- Wood siding
- Engineered wood siding
- Insulated metal panels
- Porcelain panels
- Stone honeycomb panels
- Architectural concrete panels
- Custom façade systems
Why Choose Cladders?
Complete Wall Assembly Expertise
We work from the backup wall outward—not just the visible cladding.
Contractor & Supplier Capabilities
We can support design, supply, procurement, and installation.
Building Envelope Knowledge
We understand how water, air, vapor, insulation, drainage, and structure work together.
Experience With Modern Rainscreen Assemblies
Our systems support a wide range of architectural cladding products and façade designs.
Practical Solutions
From economical projects to highly engineered commercial assemblies, we tailor every system to the needs of the project.
Frequently Asked Questions
What is a building envelope contractor? A building envelope contractor specializes in the systems that separate the interior of a building from the outside environment. These systems may include weather barriers, air barriers, exterior insulation, thermal breaks, cladding support systems, and exterior cladding.
What is an exterior wall assembly? An exterior wall assembly is the complete wall system from the structural backup wall outward. It typically includes sheathing or concrete block, weather barriers, insulation, thermal breaks, support systems, rainscreen cavities, and exterior cladding.
What is the difference between a weather barrier and an air barrier? A weather barrier manages water that penetrates behind the cladding, while an air barrier controls air leakage through the wall assembly. In some systems, one product may perform both functions.
What is the difference between a vapor barrier and a weather barrier? A vapor barrier controls vapor diffusion through the wall assembly, while a weather barrier manages bulk water and moisture behind the cladding.
What insulation works best behind cladding? The ideal insulation depends on fire requirements, thermal performance, moisture management, cladding type, and support systems. Common options include mineral wool, stone wool, polyiso, EPS, XPS, and spray foam.
What are thermal breaks? Thermal breaks are components used to reduce heat transfer through metal brackets, clips, rails, and support systems.
What are sub-girts used for? Sub-girts are one type of secondary framing used to support exterior cladding. Other support systems may include rails, clips, brackets, and thermally isolated attachment systems.
Do all cladding systems require a rainscreen cavity? Modern high-performance wall assemblies typically benefit from a ventilated rainscreen cavity that promotes drainage and drying behind the cladding.
Can older buildings be upgraded before recladding? Yes. Existing buildings can receive new weather barriers, insulation, thermal breaks, support systems, and rainscreen assemblies before new cladding is installed.
Can Cladders work over concrete block walls? Yes. We regularly install exterior wall assemblies over concrete block, sheathing, masonry, and other suitable substrates.
Does Cladders supply and install the materials? Yes. Cladders provides design assistance, procurement, material supply, and installation for complete exterior wall assembly systems.
Frequently Asked Questions
A building envelope contractor specializes in the systems that separate the interior of a building from the outside environment. These systems may include weather barriers, air barriers, exterior insulation, thermal breaks, cladding support systems, and exterior cladding.
An exterior wall assembly is the complete wall system from the structural backup wall outward. It typically includes sheathing or concrete block, weather barriers, insulation, thermal breaks, support systems, rainscreen cavities, and exterior cladding.
A weather barrier manages water that penetrates behind the cladding, while an air barrier controls air leakage through the wall assembly. In some systems, one product may perform both functions.
A vapor barrier controls vapor diffusion through the wall assembly, while a weather barrier manages bulk water and moisture behind the cladding.
The ideal insulation depends on fire requirements, thermal performance, moisture management, cladding type, and support systems. Common options include mineral wool, stone wool, polyiso, EPS, XPS, and spray foam.
Thermal breaks are components used to reduce heat transfer through metal brackets, clips, rails, and support systems.
Sub-girts are one type of secondary framing used to support exterior cladding. Other support systems may include rails, clips, brackets, and thermally isolated attachment systems.
Modern high-performance wall assemblies typically benefit from a ventilated rainscreen cavity that promotes drainage and drying behind the cladding.
Yes. Existing buildings can receive new weather barriers, insulation, thermal breaks, support systems, and rainscreen assemblies before new cladding is installed.
Yes. We regularly install exterior wall assemblies over concrete block, sheathing, masonry, and other suitable substrates.
Yes. Cladders provides design assistance, procurement, material supply, and installation for complete exterior wall assembly systems.
Start Your Building Envelope Project With Confidence
The performance of the finished façade depends on what is installed behind it.
If your project requires weather barriers, exterior insulation, thermal breaks, cladding support systems, or complete exterior wall assembly services, Cladders can help.
Contact Cladders to discuss your building envelope project.
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