Simpson doors are tested and rated to meet a variety of code requirements for today's homes. For over a century, we have been proud to make doors for American homeowners and can ensure you are getting fine craftsmanship and care with every door we build.
We are constantly striving to supply our customers with the most beautiful and efficient doors possible. Our research and engineering efforts have been a major reason why our doors continue to perform well while retaining the classic beauty that has become synonymous with the Simpson name.
Over the years, we have received questions from many of our customers regarding energy efficiency. Here are answers to some of the most common questions, as well as a summary of the most recent NFRC testing results for Simpson's doors.
According to the Temperate Forest Foundation, wood is 16 times more efficient as an insulator than concrete, 415 times as efficient as steel and 2,000 times as efficient as aluminum. And wood is the only truly sustainable resource as forests are able to regenerate themselves within our lifetime.
The majority of heat loss in an entryway occurs around the door rather than through the door. Therefore the most important considerations for energy efficiency are how well the door has been hung and the quality of the application of the weatherstripping. Take great care during these steps or hire a professional to do the work for you.
Simpson offers insulated glass (I.G) units and argon-filled and specially coated units to meet virtually all climate considerations. A Simpson Authorized Dealer will be able to assist you in determining what options work best for your specific needs.
U-Factor is the measurement of how well a building material—typically windows and doors—keeps heat inside of a building or home. The lower the U-Factor, the greater the door's resistance to heat flow and the better its insulating factor.
Solar Heat Gain Coefficient (SHGC) measures how well a product blocks heat by sunlight. SHGC is expressed as a number between 0 and 1. The lower the SHGC, the less solar heat is transmitted.
Visible transmittance (VT) is an optical property that indicates the fraction of visible light transmitted through a door. The lower the VT, the less light is transmitted.
Air leakage (AL) is a measure of heat loss and gain through cracks in the door assembly. It is expressed as the equivalent cubic feet of air passing through a square foot of window area. The lower the AL, the less air will pass through cracks in the door assembly.
All Simpson products have been tested according to the National Fenestration Rating Council’s (NFRC) Product Certification Program. And all test results are available below, as well as the NFRC Certified Product Directory (CPD).
The following test data includes u-factor, solar heat gain coefficient (SHGC) and visible transmittance (VT) values for every Simpson door. Please note that some designs may have different values based on the components and/or glass type specified for the door.
In addition to u-factor, SHGC and VT, Simpson doors have been tested for air leakage, a more recent requirement for some states and municipalities. All Simpson doors have met the air leakage ≤ 0.3 requirement. The specific test yielded the following air leakage test results: Inswing doors: 0.06. Outswing doors: 0.04.
Your project may require the NFRC CPD numbers and the Simpson numbers are as follows:
SHGC=Solar Heat Gain Coefficient
Simpson’s Impact-Resistant Doors are built to withstand sustained winds and high levels of impact with the beauty that only a wood door can provide.
Now when you order an impact-resistant door, you don’t have to settle for clear glass. You have a variety of textured glass options to choose from including:
You may also choose to add Low-E argon to the glass unit, tint the glass bronze, grey, green, blue or order "turtle code compliant" glass. Contact Simpson for the latest impact-resistant glass offerings, or view these options.
These doors have been tested for air, water and structural performance to rated design pressures and, when used in conjunction with our WaterBarrier® technology option, are ideally suited for coastal areas or other regions affected by severe weather. To ensure Simpson impact-resistant doors meet code compliance in your area, contact your local building code officials.
Impact-resistance approved under Florida code report #FL9668 and Texas Dept. of Insurance Approval Report number DR-289 and DR-291. Non-impact DP rated doors are under Florida code report #FL14487 and #FL14488. And Texas Dept. of Insurance Approval Report numbers DR-565, DR-566 and DR-567.
Simpson doors are made only with no-urea formaldehyde glues, which is great news for indoor air quality. And for those with sensitivity to volatile organic compounds (VOC), Simpson doors are a great choice for your home.
All Simpson doors are CARB (California Air Resource Board) Phase 2 Compliant and have received the coveted 4-star rating from the Japanese Ministry of Land, Infrastructure and Transportation for the lowest possible emissions of formaldehyde.
The approvals are bestowed upon panel doors and Simpson has received these approvals for a number of door products including doors 1-3/4" or 1-3/8" thick, with the following panels:
Simpson offers thousands of choices for fire-rated doors, including 20-minute fire-rated wood doors and MDF doors with fire ratings up to 90-minute. And since Simpson fire doors have been designed to match other interior doors, your fire-rated doors will blend seamlessly with all doors in your home. Simpson MDF doors are available with 90-, 60-, 45- and 20-minute fire ratings. Learn more about your design options for these doors here:
Simpson 20-minute fire-rated doors comply with major code requirements for the 20-minute fire safety classification. This classification covers most residential requirements and can also meet commercial requirements for 20-minute. And best of all, Simpson 20-minute fire-rated doors match up perfectly with virtually any Simpson interior panel door, regardless of design or species.
Simpson can manufacture any door to meet ADA requirements and guidelines. The following information delivers a general overview of primary ADA requirements for doors:
Width and Height Requirements:
According to ADA standards, the clear width of a door opening shall have a minimum clear opening of 32 in (815 mm) with the door open 90 degrees, measured between the face of the door and the opposite stop. (Figure 1)
The clear height of a door opening must be a minimum of 80 inches. (Figure 2)
If there are any projections on the face of the door, they must be no lower than 34 inches above the floor or ground and must not extend more than 4 inches from the surface of the door. (Figure 3)
Door surfaces within 10 inches of the floor or ground must be a smooth surface on the push side extending the full width of the door. Any parts creating a horizontal or vertical joint on the surface shall be within 1⁄16 inch in depth. If cavities are created by added kick plates they must be capped.
Handles, pulls, latches, locks and other operating devices on accessible doors must have a shape that is easy to grasp with one hand and does not require tight grasping, tight pinching, or twisting of the wrist to operate. Lever-operated mechanisms, push-type mechanisms, and U-shaped handles are acceptable designs. When sliding doors are fully open, the operating hardware must still be exposed and usable from both sides. Hardware must be mounted no higher than 48 inches above finished floor.
Thresholds at doorways shall not exceed 3/4 in (19 mm) in height for exterior sliding doors or 1/2 in (13 mm) for other types of doors. Raised thresholds and floor level changes at accessible doorways shall be beveled with a slope no greater than 1:2. If the changes in level are greater than 1⁄2 inch, the threshold must be equipped with a ramp. The floor or ground surface within the maneuvering clearances at the doorway must not have a slope steeper than 1:48.
If a door has a closer, then the sweep period of the closer shall be adjusted so that from an open position of 70 degrees, the door will take at least 3 seconds to move to a point 3 in (75 mm) from the latch, measured to the leading edge of the door.
ADA Information is available on the Justice Department’s ADA home page at www.ada.gov. The ADA Accessibility Guideline for Buildings and Facilities can be found at www.access-board.gov, or call the ADA Information Line at (800) 514-0301 for a free copy of the regulations.