New Apartment Complex - Martensville, SK
SGL Project Case Study · 4-Storey Multi-Family Residential + Basement Parkade
- Multi-Family Residential
- Vinyl / uPVC Windows
- Cold Climate
- NFRC Certified
SGL provided a complete window and door system solution for a four-story, multi-family residential apartment complex located in Martensville, Saskatchewan, Canada. The project involved the delivery of 243 units-comprising 159 windows and 84 sliding doors-all utilizing SGL's Series 83 and 88 Premium uPVC profiles. These units featured a black finish on both the interior and exterior surfaces, paired with a dual-pane insulated glass configuration consisting of 5mm Low-E / 5mm Clear glass, argon gas filling, and Warm-Edge spacers. The products achieved a commercial-grade performance rating of CW-PG65, boasting a center-of-glass U-Factor as low as 0.26 Btu/h·ft²·°F. Fully certified by the NFRC, these systems comprehensively meet the requirements of the 2018 BCBC (British Columbia Building Code), as well as Canadian energy efficiency and acoustic standards. Throughout a multi-month-long drawing review process, SGL collaborated closely with the construction firm; after navigating multiple rounds of RFIs, the designs were ultimately approved with zero defects and moved into production. This achievement serves as a powerful validation of SGL's end-to-end delivery capabilities-spanning design, manufacturing, and technical coordination-specifically within the context of multi-family residential projects situated in North America's cold-climate regions.
📋 Project Overview
| Project Name | New Apartment Complex - Martensville |
| Location | Lot 3, Block 5, Plan G928, Martensville, Saskatchewan, Canada |
| Building Type | 4-Storey Residential Apartment + Basement Parkade |
| Client / Developer | 101304492 Saskatchewan Ltd., Saskatoon, SK |
| Applied Code | 2018 British Columbia Building Code (BCBC) |
| Project Status | New Construction - Supply Only |
| Scope | Vinyl Window & Sliding Door System (Design, Manufacture & Supply) |
| Shop Drawing Date | February 2, 2026 |
243
Total Units
159
Windows
84
Sliding Doors
CW-PG65
Performance Rating
0.26
C.O.G. U-Factor
4
Storeys
🪟 Scope of Work - Window & Door Package
Product Summary
| Code | Type | Series | Qty | Description |
|---|---|---|---|---|
| W03 | Awning Window | 83 Series Vinyl | 147 | Open-out with hinge at jambs |
| W06 | Casement Window | 83 Series Vinyl | 12 | Open-out with hinge at top & bottom |
| DE01 | Sliding Patio Door | 88 Series Vinyl | 84 | Sliding patio door (swing door option) |
Windows Total
159 units
147 Awning + 12 Casement
Sliding Doors Total
84 units
88 Series Vinyl
Product Features
- Frame Material: Premium uPVC Vinyl (83 & 88 Series)
- Finish: Black (Exterior & Interior)
- Glazing: 5-LowE / 5-Clear / Argon Fill / Warm-Edge Spacer (5T/5T, 12mm Air Gap)
- Reinforcing: Internal steel reinforcement for structural integrity
- Insect Screen: Lip insect screen integrated
- Hardware: Roto gear operator system (awning & casement windows)
- Weep System: Factory-drilled weep slots at 30" O.C. and 8" from ends (3/8" × 5/8")
📐 Thermal Performance Data
Center of Glass (C.O.G.)
| Series | U-Factor (Btu/h·ft²·°F) | U-Factor (W/m²·K) | SHGC | VT | SC |
|---|---|---|---|---|---|
| 83 Series (Windows) | 0.26 | 1.51 | 0.50 | 0.67 | 0.57 |
| 88 Series (Doors) | 0.27 | 1.51 | 0.50 | 0.67 | 0.57 |
Fenestration (Whole-Unit)
| Product | U-Factor (Btu/h·ft²·°F) | U-Factor (W/m²·K) | SHGC | VT | SC |
|---|---|---|---|---|---|
| 83 Series - Awning/Casement | 0.29 | 1.64 | 0.27 | 0.35 | 0.32 |
| 88 Series - Patio Door | 0.29 | 1.64 | 0.27 | 0.35 | 0.32 |
✅ All thermal performance values are NFRC Certified and listed in the NFRC Certified Product Directory.
🏆 Performance & Compliance
Structural Performance
| Performance Class | CW (Commercial Window) |
| Performance Grade | 65 |
| Air Infiltration | ✅ Canadian Standard |
| Water Penetration | ✅ Canadian Standard |
| Site Testing | ✅ 5-day notification protocol |
Code Compliance
| Building Code | 2018 BCBC |
| Energy Code | ✅ U-Factor & SHGC met |
| Acoustical | ✅ STC / OITC per BCBC |
| Thermal | ✅ NFRC 100/200/500 |
| Fire Protection | NFPA 13 / 13R / 14 |
🔧 Installation System
Fastening Specification
| Fastener | Location | Specification |
|---|---|---|
| Galvanized Roofing Nail | Sill | 2-1/2" @ 12" O.C. |
| #10 × 1-1/2" CAD PL Screw | Sill (alternative) | @ 12" O.C. |
| #10 × 3/4" Wafer Head TEK Screw | Jamb | @ 6" O.C. |
| #10 × 1-1/2" Pancake Head SMS | Head (83 Series) | @ 12" O.C. |
| #10 × 2" Pancake Head SMS | Head (88 Series) | @ 12" O.C. |
Key Details
- 0.4" clearance maintained at rough opening (all sides)
- 1/8" heel dimension at sill; 2" high-impact plastic shims @ 4" O.C.
- 20 ga. × 2" steel head retainer clips (accommodates vertical building movement)
- 1" × 1" × 1/16" extruded aluminum anchoring angle, Ø 1/4" pre-drilled holes @ 12" O.C.
- Non-structural head flashing with end dams per BCBC; 7× head deflection allowance
Installation Advisory: No expanding foam - warranty void if foam deformation occurs. Shims must be applied consistently at sill, jambs, and head. Fixed-over-casement drains via T-bar; fixed-over-fixed drains via jamb through sill.
🏢 Building Overview
Structure
- 4 residential floors
- Basement parkade - 89 stalls (51+38)
- EV-ready charging stalls
- Elevator
Unit Mix
- Bachelor units
- 1-Bedroom: Types A, A.1, B, B.1, C, D, J
- 1-Bedroom + Den: Type C
- 2-Bedroom: Type F (predominant)
- 3-Bedroom: Types G, H (corner units)
- Accessible 1-Bedroom: Type J
Common Amenities & Infrastructure
- Fitness Club - 839 sq ft
- Fire Protection: NFPA 13 (parkade), NFPA 13R (residential), NFPA 14 (standpipes)
- Water Supply: Dual 6" service - Static 63 PSI, Residual 45 PSI, Flow 1,130 USGPM
- Exterior: Sidewalk, irrigated sod, retaining walls, structural sidewalk
🔄 RFI Review Process
SGL successfully navigated a rigorous multi-round RFI review process, coordinating across four consulting disciplines:
| RFI | Subject Area | RFI | Subject Area |
|---|---|---|---|
| #13, #14, #15, #22 | Structural & architectural coordination | #25, #26 | Rough opening verification |
| #27 | Mechanical coordination | #31 | Elevations & installation sequencing |
| #36 | Thermal / energy code compliance | #37 | Interior design coordination |
| #39 | Millwork interface | - | - |
🎯 Why This Matters for SGL
🏠 Multi-Family Expertise
Complete window & door package for a mid-rise (4-storey) multi-family building, meeting all Canadian code requirements.
❄️ Cold Climate Performance
C.O.G. U-Factor as low as 0.26 - exceeding energy codes for Saskatchewan's extreme winter climate.
📜 NFRC Certified
All thermal data NFRC certified, giving architects confidence in real-world energy performance.
📐 Full Documentation
Shop drawings, glazing schedules, floor plans, elevations, installation details, and thermal reports.
🤝 Multi-Party Coordination
Seamless collaboration with architect, structural engineer, mechanical engineer, GC, and envelope consultant.
✅ Full Compliance
2018 BCBC, Canadian energy & acoustical standards, NAFS/CSA CW-PG65 window performance.
📄 Reference Documents
- SGL Vinyl Window Shop Drawing - Preliminary Review, February 2, 2026
- Martensville Updated Construction Drawings - Rempel Engineering & Management Ltd., October 28, 2025
- Arrow Engineering Mechanical Drawings - Project #12323, June 26, 2025
- NFRC Certified Product Directory - SGL 83 & 88 Series