Premium SIPs for Modern Construction

Structure

Thermal
Isolation

Interior & Exterior Sheathing

Electrical
Conduits

Preflex SIP Framing System


Revolutionize Your Builds with Our Tech-Driven Building System: Employing BIM Modeling and Offsite Fabrication, we Engineer and Manufacture Structural Insulated Panels (SIPs). These Panels Feature a Solid Core of Expanded Polystyrene (EPS) Structurally Laminated to Two Oriented Strand Board (OSB) Skins, Providing Superior Energy Efficiency, Comfort, Air Quality, Design Flexibility, Structural Strength, and a Build Process Twice as Fast Compared to Traditional Stick Framing.

Our SIPs encompass framing, insulation, wire conduits, and sheathing in a single component,  and is considered one of the most energy-efficient building systems on the market.

Code Compliance

ESR-5318
ICC Evaluation Service Report Listing ESR-5318
International Building code (IBC)
International Residential Code (IRC)

For evaluation for compliance with codes adopted by the California Office Statewide Health planning and Development (OSHPD) AKA: California department of Health Care Access and information (HCAI) and Division of State Architects (DSA), see ESR-5318 CBC and CRS Supplement.

For evaluation for compliance with codes adopted by the Los Angeles Department of Building and safety (LADBS), see ESR-5318 LABC and LARC Supplement.

Properties Evaluated
-Structural
-Thermal Barrier
-Seismic Performance


California  FBH insignia: Inspected by Quality Approval Agency (QAA) and Design Approval Agency (DAA)

Included in your Kit

1. SIP Wall

2. SIP Roof

3. SIP Floor

4. Block Splines

5. Lumber Splines

6. SIP Cap plates

7. Bottom Plate

8. Preasure Treated Sill Plate

9. Pre-Cut Electric chase

10. LVL Ridge Beam

11. Perlim beam

12. I-Joist for Sub-floor

13. T&G OSB for Sub-floor

14. Preflex Insulated Header

15. Lumber for interior Walls Framing

- Cut to size SIP Exterior Walls
- Cut to Size SIP Roof
- Cut to Size SIP Floors
- Block Splines pre installed to the panel Caulking gun
- Lumber for: Bottom, Side and cap plates
- Pre cut wire conduit
- Insulated headers for doors and windows

OPTIONAL
- Strucutral lumber internal to the panel (price determined after engineering)
- Lumber for interior partition walls
- I-beams and TGI OSB for subfloor
- Preasure treated sill plate ripped to the thickness of the panel
- Strucutral LVL Ridge and perlim Beams
- SIP Sealnt
- SIP Tape
- SIP fasnters
- Caulking gun

OPTIONAL
- SIP Lifting Plate
- Simpson Strong Tide hardwear
- SIPSON CS16 16 Gauge Coiled Strap
- Rachet Strap
- Groove Cutter
- Fork Lift Extension
- Preflex Customer Support
- Instalation manuals and videos
- PE Stamped SIP shop Drawings
- 20 year limited warranty

OPTIONAL
- Rep on site for Instalation Assitance
- Engineer on record (EOR) service through builder network
- Architectural services through builder network
- Title 24 Calculations through builder network
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How it Works

At Preflex, we're more than a supplier; we're a collaborative team of engineers, designers, manufacturing experts, and installation specialists. Committed to working with you, we aim to maximize the benefits of your SIP package.
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What's Included

Nail Base

INCLUDES
Nail Base Panels come in sizes 4x8 up to 4x16 and can come with reliefs upon request as well block splines upon request, pricing includes no reliefs or splines or reliefs.

DOES NOT INCLUDE
• Splines
• Reliefs

*Available upon request

Blank Panels

INCLUDES
Panels come in sizes 4x8 up to 8x24 in one foot increments.

DOES NOT INCLUDE
• Wire chases
• Reliefs

*Available upon request

Pre-cut

INCLUDES
• Custom SIP design & site plan
• Engineering stamp (optional)
• Panels factory cut to size. Panels Cut to size, shape with full reliefs, bevels, miters, angles, compound cuts with wire chases to match panel shop drawings provided by Preflex Inc.
• Openings, bevels, etc.
• Foam cut back to accept splines lumber
• Wire chases pre-cut
• Required accessory materials (see below)

DOES NOT INCLUDE
• Lumber
• Lumber headers

*Architectura-grade LVL beams are available if needed. The quantities of lumber are estimated based on the current project information available. Upon receipt of approved engineering drawings specifying the necessary additional structural members, we will be able to offer a precise estimate detailing the actual lumber package quantities required for the project. ADDITIONAL LUMBER SPECIFIED BY ENGINEER NOT INCLUDED.

Ready-To-Assemble

INCLUDES
• Custom SIP design & site plan
• Engineering stamp (optional)
• Panels factory cut to size. Panels Cut to size, shape with full reliefs, bevels, miters, angles, compound cuts with wire chases to match panel shop drawings provided by Preflex Inc.
• Openings, bevels, etc.
• Foam cut back to accept splines lumber
• Wire chases pre-cut
• Required accessory materials (see below)
• Insulated Headers
• Pressure treated Sill Plates
• SIP Sealant
• SIP Tape
• SIP Screws
• Full lumber and lumber install
• Preflex will supply all bottom and top plates, splines, window and door bucking, headers consisting of standard or engineered lumber based on drawings specified by the shop drawings. All lumber and headers will be factory installed unless splitting between panel seams.

*Instaled headers, treated plate, Beams upon request.

*Architectura-grade LVL beams are available if needed. The quantities of lumber are estimated based on the current project information available. Upon receipt of approved engineering drawings specifying the necessary additional structural members, we will be able to offer a precise estimate detailing the actual lumber package quantities required for the project. ADDITIONAL LUMBER SPECIFIED BY ENGINEER NOT INCLUDED.

Why build with Preflex?

Disaster Resilient Future-Proof Home

Stronger Straighter Walls and Roofs
Proven to be stronger against storms hurricanes and earthquakes
Every wall will have shear strength
Lightweight construction enhances its strength against earthquakes.

Cut Framing Labor Cost and Time by 50%

Utilizing BIM 3D modeling and off-site manufacturing technology, we conduct the majority of fabrication in our facility to streamline your construction timeline.
3x faster wall install
2x faster roof install
Insulated and Sealed

Reduce the Carbon footprint by over 1 million lbs over the lifetime of the building

65% less Timber
No Jobsite Waste
All waste from manufacturing gets recycled

Save up to 50% on HVAC cost thanks to superior insulation

Continuous closed cell foam insulation eliminated thermal brakes, increasing air tightness and reducing energy loss.
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Downsize HVAC Systems
Insulation wont decay over time guranteed
85% less air leakage

Superior Air quality;
No Off-gassing, Harmful Chemicals or VOC's

No Urea Formaldehyde
Airtightness doesnt allow contaminants like dust or pollen in the structure.
No wall cavaties for mold growth
Quieter

Surpass Minimum Code Requirements

Space- Replace attic with conditioned space for an aditional bedroom or storage area.
Quality- Better resilience against natural deaster result in lower insurance cost
Value- superior energy performance & strength result in a higher appraisal value  
Superior Insulation-Lower operational cost of the Building and Obtain green construction certification credits

SIP Panels

Applications

Walls

Preflex walls offer framing, insulation, and sheathing with more structural integrity than studs. Our walls come ready to install with most of the work done off-site, such as electrical chases and box cutouts, and rough openings for doors and windows with headers and seals. Our walls make the interior finishes easier by allowing for drywall and cabinetry to be fastened on any part of the wall thanks to the high tensile strength of OSB.

Retrofit

Preflex RetroFit Panels seamlessly combine a single layer of OSB with expanded polystyrene (EPS) rigid insulation. They're designed to enhance insulation and boost energy efficiency when applied over an existing structure. As they consist of just one OSB layer, these panels are non-structural.

Roofs

Preflex roofs allow for great design creativity by removing the need for trusses and replacing the attic with conditioned space, this allows you to easily obtain high vaulted ceilings with a fraction of lumber and structural elements.

Floors

Preflex floors are easy to install on raised foundations, they reduce the amount of  joist as they only require them going in one direction. By using our floors you ensure an air-tight build throughout the whole building envelope

Advantages

Faster Construction

Prefabricated panels can be deployed quickly, built in half the time compared to stick framing

Material & Labor Savings

Off-site fabrication results in accurate material and labor costs with no overages.

Sustainable & Energy Efficient

Low carbon construction and superior insulation results in up to 50% energy savings.

Avoid Labor Shortages

Remove the need for skilled carpentry.

Zero Waste Production

All material and scrap from fabrication are either recycled or reused for another project eliminating fabrication and job site waste.

Increase Property Value

Increased Energy Efficiency reduces operating costs while increasing property valuation.

Healthy Home

No VOCs, Healthy Interior Air Quality

Customizable

Our designs are minimalistic, modern, and flexible enough to customize to your own taste.

Residential

Multifamily

ADU

Commercial

Preflex SIPs are meticulously engineered for a wide range of applications, including Residential, Multifamily, Accessory Dwelling Units (ADUs), and Commercial building projects. Utilizing advanced fabrication techniques these SIPs offer a tailored, versatile solution to meet specific structural requirements across various construction domains while resulting in a Net Zero ready high performance building.

vs
SIPs
Tight Envelope Continuous Insulation
Environmentally sustainable
1 days assembly with 4 installers: 700sqft
Engineering included
21 year limited warranty
Fixed cost
Zero on site waste
Stick Frame
Thermal bridging and air cavities
High carbon footprint
15 day framing with highly skilled carpinter: 700sqft
Engineering cost 6-8K
Floating Material cost estimates
Expensive change in order cost
Continues cleanup and trash hauling
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FAQs

Frequently Asked Questions

What are SIPs?

Structural insulated panels (SIPs) are high-performance building panels used in floors, walls, and roofs for residential and light commercial buildings. The panels are made by sandwiching a core of rigid foam plastic insulation between two structural facings, such as oriented strand board (OSB). Other skin materials can be used for specific purposes. SIPs are manufactured under factory controlled conditions and can be custom designed for each project. The result is a building system that is extremely strong, energy-efficient and cost effective. Building with SIPs will save you time, money and labor.

How much faster can I build with SIPs?

SIP homes go up much faster than traditionally framed buildings. A properly trained SIP installation crew can cut framing time by 55 percent compared to conventional wood framing, according to a third-party study conducted by R.S. Means. Panels are manufactured as big as 8-foot by 24-foot, so entire wall and roof sections can be put up quickly, reducing dry-in time. SIPs are ready to install when they arrive at the jobsite, eliminating the time needed to perform the individual jobsite operations of framing, insulating and sheathing stick framed walls. Electrical chases are typically provided in the core of panels, so there is no need to drill through studs for wiring.

How much money can I save with SIPs?

Builders can save money through decreased construction and labor costs. A high-performance building envelope often allows HVAC equipment to be downsized and ductwork to be minimized. Builders can also significantly reduce jobsite waste disposal and temporary heat during construction. Homeowners that incorporate other energy-efficient features into a SIP home can see utility savings of 50 percent or more. In a 2021 example for a typical 2,000 sf home, using SIPs saves over $16,000 in eliminated 2 x 4 raw material costs alone due to the high costs of lumber versus OSB used for SIPs.

Are SIPs accepted by building codes?

SIP construction is recognized by the International Code Council body of building codes, which are used by most jurisdictions in the U.S. SIPs are also approved by the State of Florida for High Velocity Hurricane Zones (HVHZ).

For residential buildings, specific construction practices for SIP wall systems are included in Section R610 of the 2018 International Residential Code. For applications beyond the scope of Section R610, the building inspector will typically require a licensed engineer or architect to approve the building plans prior to construction. An engineer’s approval is always required in high wind areas, high seismic zones and commercial buildings.

What is the R-Value of SIPs?

R-values for SIPs depend on the thickness of the SIP and the type of core material that is used. See SIPA’s R-value chart for the minimum R-values of commonly available SIPs.

Static R-values, like those included in the chart, rate the effectiveness of insulating material. However, they do not accurately describe how products perform in a real-world setting. When fiberglass or other types of insulation are installed, they are installed around structural members made of wood or metal that have very poor insulating value. Field-installed insulation materials are also prone to installation imperfections.

The Department of Energy’s Oak Ridge National Laboratory has studied and tested the performance of entire wall assemblies in large sections. The resulting whole-wall R-value data reveals that a 4-inch SIP wall rated at R-14 outperforms a 2 × 6 wall with R-19 fiberglass insulation. For more detail, download the free SIP Design Best Practices 1: High-Performance SIP Building Envelope.

Can plumbing be installed in SIPs?

Plumbing should not be located in exterior SIP walls because of the possibility of condensation or supply lines freezing in cold climates. During the design phase of the project, all plumbing should be relocated to interior walls.

If plumbing must be located on an exterior wall, it is recommended that a surface chase be installed on the interior of the wall to conceal plumbing. Another option is to construct a small section of the wall using conventional wood framing that can be used to run plumbing. Plumbing penetrations such as drain water vents (DWV) can be placed through SIPs if they are thoroughly sealed to prevent air infiltration.

How does the SIP design and fabrication process works?

The construction of a SIP home or commercial building begins with the construction documents. Once the construction documents are in the hands of a SIP manufacturer, dealer/distributor or design professional, they are converted to SIP shop drawings that give the dimensions of each individual panel.

The shop drawings are reviewed by the builder, engineer, the building owner and other involved parties. Once the shop drawings are finalized, the SIPs are fabricated and shipped to the jobsite for installation. For more information, watch the half-hour educational videos on SIP Order Process and SIP Layout Drawings. For a more complete process summary, download the free brochure Designing with SIPs: DESIGN CONSIDERATIONS.

Pre design Kits

Model 12

R 192ft²‍ | L 288ft²‍ | XL 384ft²

Model 16

R 542ft²‍ | L 640ft²‍ | XL 768ft²

Model 20

R 640ft²‍ | L 800ft²‍ | XL 960ft²

Model 24

R 768ft²‍ | L 960ft²‍ | XL 1152ft²

Schedule a call with Our Team

Our Team of Experts will accompany you throughout your process.

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