Alexander, J.
The broad issue presented by this appeal is whether the Court of Appeals correctly affirmed the trial court’s conclusion that no material factual issue precluded entry of a summary judgment in favor of Alpine Windows in a suit brought against Alpine for negligent design of a window and for failing to provide warnings of the danger presented by the window. We conclude that the trial court correctly granted a summary judgment foreclosing the plaintiffs’ claim for a failure to warn but erred in concluding that the window, as designed, was not unreasonably dangerous. We, therefore, reverse the decision of the Court of Appeals in part.
[322]*322The suit against Alpine had its genesis in 1993, when 20-month-old Daniel Soproni fell from a second story window of an apartment complex onto a concrete patio. Just prior to the fall, Daniel had been playing on a bed in the bedroom in an apartment belonging to his mother’s boyfriend. During his play Daniel would open and shut a window, which was accessible from the bed. This activity attracted the attention of the child’s mother and her boyfriend and caused them on more than one occasion to close the window and warn Daniel to stay away from it. Unfortunately, the child climbed back onto the window ledge where he again opened the window. Daniel’s mother saw Daniel do this and stood up with the intention of retrieving him. Before she was able to do so, however, the child leaned back against the window screen. The screen dislodged and Daniel fell onto the patio below. As a result of the fall, Daniel sustained head injuries resulting in long-term neurological deficits.
The window through which the child fell was marketed under the name “Alpine 220,” and was manufactured by Alpine Windows. This window was sold by Alpine, along with others, to Polygon Apartment Partners and was installed at an apartment complex owned by Polygon, which was known as “Campus Grove.” According to the record, Alpine had sold windows to Polygon for several other apartment complexes that were owned by Polygon.
The window was in a “pop-out configuration.” (See diagram.) This resulted in there being a 16V2-half inch interior window ledge. The window, which was 34 inches above the floor, slid open horizontally from left to right. It was secured by a “detent mechanism” or “drop bolt” which was designed to drop vertically by gravity into a slot in the window track when the window was closed or at a three-inch opening. Clerk’s Papers (CP) at 264. The window could be opened with minimal effort merely by lifting the detent and applying horizontal pressure. The window did not have a locking device for the detent. The screen, which was not manufactured by Alpine but was sold to Polygon as a unit, was held in place by plastic clips. The Alpine 220 was [323]*323designed to meet or exceed standards set forth in the Uniform Building Code, the National Fire Protection Association Codes, and various building association codes. These standards provide that the window should be able to be opened from the inside without the use of separate tools in order to allow egress in the case of fire.
Daniel’s mother and a guardian ad litem for the child, Bruce A. Wolf, sued Alpine, Polygon, and the architect who designed the Campus Grove apartment complex. The defendants all moved for summary judgment. In opposition to these motions, the plaintiffs filed affidavits from an architect, a human factors engineer, and the managing agent of Polygon.
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[324]*324The architect and human factors engineer both said that the detent mechanism could be easily manipulated by an infant and that the window was not safe without a device to deter or prevent a small child from opening it. Both experts also indicated that the safety hazard presented by this window could have easily been designed out of it without compromising compliance with applicable codes and standards. The architect opined that feasibly safe alternatives would include a “casement window which is opened by a hand crank, a keyless locking barrier, a thumb screw locking detent and/or a double hung window which only opened from the top down.” CP at 265-66. He indicated, in addition, that “[a] well-designed detent can be child-proofed through use of a simple thumb screw device.” CP at 264. These alternatives, he indicated, would have been safer and would “probably have prevented this accident.” CP at 266. The human factors engineer indicated that the “window should have been able to be secured with a child-proof barrier or lockout to prevent opening more than 4.5 inches.” CP at 225.
The apartment complex managing agent discussed two alternative window designs. One included a spring-loaded clip that had to be squeezed before the window could be opened and the other had a furled knob that could be hand tightened to prevent opening. He indicated that the developer would have bought a window with a safer design if it had been offered at the same price. Alpine acknowledged that it makes different types of windows.
The trial court granted summary judgment to the defendants on all claims. The plaintiffs appealed only the summary judgment in favor of Alpine. The Court of Appeals affirmed, concluding that Daniel’s mother and the guardian ad litem could not establish that the window was not reasonably safe in design or that the damage was caused by Alpine’s failure to include warnings. The plaintiffs sought review of that decision and we granted it.
“When reviewing an order granting summary judgment, the appellate court engages in the same inquiry as [325]*325the trial court.” Barr v. Day, 124 Wn.2d 318, 324, 879 P.2d 912 (1994). It must consider the facts and all reasonable inference from those facts in the light most favorable to the nonmoving party. Hansen v. Friend, 118 Wn.2d 476, 485, 824 P.2d 483 (1992). The appellate court must reverse summary judgment if the evidence could lead reasonable persons to reach more than one conclusion. On the other hand, it must affirm if there is no genuine issue as to any material fact and the moving party is entitled to judgment as matter of law. CR 56(c).
In a product liability action, the plaintiff must prove that his or her injuries were proximately caused1 by a product that is “not reasonably safe as designed or not reasonably safe because adequate warnings or instructions were not provided.” RCW 7.72.030(1). The plaintiffs contend that there are material factual issues under both of their theories, failure to adequately warn and defective design, that preclude summary judgment. We will discuss each theory.
A. Failure to Adequately Warn
A plaintiff establishes that a product is not reasonably safe by showing that “at the time of manufacture, the likelihood that the product would cause the claimant’s harm or similar harms, and the seriousness of those harms, rendered the warnings or instructions of the manufacturer inadequate and the manufacturer could have provided the warnings or instructions which . . . would have been adequate.” RCW 7.72.030(l)(b).
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Alexander, J.
The broad issue presented by this appeal is whether the Court of Appeals correctly affirmed the trial court’s conclusion that no material factual issue precluded entry of a summary judgment in favor of Alpine Windows in a suit brought against Alpine for negligent design of a window and for failing to provide warnings of the danger presented by the window. We conclude that the trial court correctly granted a summary judgment foreclosing the plaintiffs’ claim for a failure to warn but erred in concluding that the window, as designed, was not unreasonably dangerous. We, therefore, reverse the decision of the Court of Appeals in part.
[322]*322The suit against Alpine had its genesis in 1993, when 20-month-old Daniel Soproni fell from a second story window of an apartment complex onto a concrete patio. Just prior to the fall, Daniel had been playing on a bed in the bedroom in an apartment belonging to his mother’s boyfriend. During his play Daniel would open and shut a window, which was accessible from the bed. This activity attracted the attention of the child’s mother and her boyfriend and caused them on more than one occasion to close the window and warn Daniel to stay away from it. Unfortunately, the child climbed back onto the window ledge where he again opened the window. Daniel’s mother saw Daniel do this and stood up with the intention of retrieving him. Before she was able to do so, however, the child leaned back against the window screen. The screen dislodged and Daniel fell onto the patio below. As a result of the fall, Daniel sustained head injuries resulting in long-term neurological deficits.
The window through which the child fell was marketed under the name “Alpine 220,” and was manufactured by Alpine Windows. This window was sold by Alpine, along with others, to Polygon Apartment Partners and was installed at an apartment complex owned by Polygon, which was known as “Campus Grove.” According to the record, Alpine had sold windows to Polygon for several other apartment complexes that were owned by Polygon.
The window was in a “pop-out configuration.” (See diagram.) This resulted in there being a 16V2-half inch interior window ledge. The window, which was 34 inches above the floor, slid open horizontally from left to right. It was secured by a “detent mechanism” or “drop bolt” which was designed to drop vertically by gravity into a slot in the window track when the window was closed or at a three-inch opening. Clerk’s Papers (CP) at 264. The window could be opened with minimal effort merely by lifting the detent and applying horizontal pressure. The window did not have a locking device for the detent. The screen, which was not manufactured by Alpine but was sold to Polygon as a unit, was held in place by plastic clips. The Alpine 220 was [323]*323designed to meet or exceed standards set forth in the Uniform Building Code, the National Fire Protection Association Codes, and various building association codes. These standards provide that the window should be able to be opened from the inside without the use of separate tools in order to allow egress in the case of fire.
Daniel’s mother and a guardian ad litem for the child, Bruce A. Wolf, sued Alpine, Polygon, and the architect who designed the Campus Grove apartment complex. The defendants all moved for summary judgment. In opposition to these motions, the plaintiffs filed affidavits from an architect, a human factors engineer, and the managing agent of Polygon.
[[Image here]]
[324]*324The architect and human factors engineer both said that the detent mechanism could be easily manipulated by an infant and that the window was not safe without a device to deter or prevent a small child from opening it. Both experts also indicated that the safety hazard presented by this window could have easily been designed out of it without compromising compliance with applicable codes and standards. The architect opined that feasibly safe alternatives would include a “casement window which is opened by a hand crank, a keyless locking barrier, a thumb screw locking detent and/or a double hung window which only opened from the top down.” CP at 265-66. He indicated, in addition, that “[a] well-designed detent can be child-proofed through use of a simple thumb screw device.” CP at 264. These alternatives, he indicated, would have been safer and would “probably have prevented this accident.” CP at 266. The human factors engineer indicated that the “window should have been able to be secured with a child-proof barrier or lockout to prevent opening more than 4.5 inches.” CP at 225.
The apartment complex managing agent discussed two alternative window designs. One included a spring-loaded clip that had to be squeezed before the window could be opened and the other had a furled knob that could be hand tightened to prevent opening. He indicated that the developer would have bought a window with a safer design if it had been offered at the same price. Alpine acknowledged that it makes different types of windows.
The trial court granted summary judgment to the defendants on all claims. The plaintiffs appealed only the summary judgment in favor of Alpine. The Court of Appeals affirmed, concluding that Daniel’s mother and the guardian ad litem could not establish that the window was not reasonably safe in design or that the damage was caused by Alpine’s failure to include warnings. The plaintiffs sought review of that decision and we granted it.
“When reviewing an order granting summary judgment, the appellate court engages in the same inquiry as [325]*325the trial court.” Barr v. Day, 124 Wn.2d 318, 324, 879 P.2d 912 (1994). It must consider the facts and all reasonable inference from those facts in the light most favorable to the nonmoving party. Hansen v. Friend, 118 Wn.2d 476, 485, 824 P.2d 483 (1992). The appellate court must reverse summary judgment if the evidence could lead reasonable persons to reach more than one conclusion. On the other hand, it must affirm if there is no genuine issue as to any material fact and the moving party is entitled to judgment as matter of law. CR 56(c).
In a product liability action, the plaintiff must prove that his or her injuries were proximately caused1 by a product that is “not reasonably safe as designed or not reasonably safe because adequate warnings or instructions were not provided.” RCW 7.72.030(1). The plaintiffs contend that there are material factual issues under both of their theories, failure to adequately warn and defective design, that preclude summary judgment. We will discuss each theory.
A. Failure to Adequately Warn
A plaintiff establishes that a product is not reasonably safe by showing that “at the time of manufacture, the likelihood that the product would cause the claimant’s harm or similar harms, and the seriousness of those harms, rendered the warnings or instructions of the manufacturer inadequate and the manufacturer could have provided the warnings or instructions which . . . would have been adequate.” RCW 7.72.030(l)(b). A plaintiff must show that a product was “unsafe to an extent beyond that which would be contemplated by the ordinary consumer” based on the failure to warn as an alternative. RCW 7.72.030(3).
Even assuming that no warnings were provided by [326]*326Alpine, or that the warnings it gave were inadequate, we are satisfied that the Court of Appeals correctly upheld the trial court’s determination that Alpine was without liability for its failure to adequately warn. We reach this conclusion because the record established that the lack of warnings did not contribute to the accident in any way. It shows, rather, that Daniel’s mother was aware that the child had easily opened the window just prior to the incident that caused the injury and that she was aware that this presented a danger. In short, there are no facts that contradict the trial court’s holding that the manufacturer’s failure to give adequate warnings was not a proximate cause of the child’s injury. Summary judgment in favor of Alpine on that issue was proper and the Court of Appeals, therefore, did not err in affirming the trial court’s ruling in that regard.
B. Design Defect
Washington’s product liability statute provides that “[a] product manufacturer is subject to liability to a claimant if the claimant’s harm was proximately caused by the negligence of the manufacturer in that the product was not reasonably safe as designed.” RCW 7.72.030(1). In Falk v. Keene Corp., 113 Wn.2d 645, 653, 782 P.2d 974 (1989), this court held that strict liability is the applicable standard for a design defect product liability claim maintained under RCW 7.72.030(2). We also determined that a plaintiff who seeks to establish liability on the part of a manufacturer under RCW 7.72.030 may do so in two distinct ways. See Falk, 113 Wn.2d at 654. On the one hand, a plaintiff may attempt to establish liability by showing that, at time of manufacture, the likelihood that the product would cause the plaintiffs harm or similar harms, and the seriousness of those harms, outweighed the manufacturer’s burden to design a product that would have prevented those harms and any adverse effect a practical, feasible alternative would have on the product’s usefulness. See Falk, 113 Wn.2d at 654; RCW 7.72.030(l)(a). This is the so-called “risk utility test.” Alternatively, a plaintiff may employ the [327]*327“consumer expectations” test, which requires the plaintiff to show that the product was “unsafe to an extent beyond that which would be contemplated by the ordinary consumer.” Falk, 113 Wn.2d at 654; RCW 7.72.030(3).2
Under the latter test, expectations are judged against the reasonable expectations of the ordinary consumer. This court has suggested that “it may be unreasonable for a consumer to expect product design to depart from legislative or administrative regulatory standards, even if to do so would result in a safer product.” Falk, 113 Wn.2d at 655.3
Here, the Court of Appeals held that the affidavit evidence presented by the plaintiffs could not establish that the window was not reasonably safe. It noted in this regard [328]*328that the window complied with all codes and standards applicable to its design, manufacture, and use and that in this instance a reasonable consumer could expect no more. It also emphasized that product safety must be considered in light of the product’s ordinary use, and reasoned that because a “window is for light, air, and egress in case of fire,” establishing that an alternative window design would deter a 20-month-old child from opening a window could not establish that the design of the window was unsafe. Soproni v. Polygon Apartment Partners, 88 Wn. App. 416, 421, 941 P.2d 707 (1997), review granted, 134 Wn.2d 1019, 958 P.2d 318 (1998).
In our view, the Court of Appeals placed too much emphasis on Alpine’s compliance with codes and standards. Although, as we have noted above, we indicated in Falk that conformity with codes may satisfy consumer expectations, evidence of compliance with codes should not foreclose the plaintiffs’ claims. Rather, evidence of whether or not a product was in compliance with legislative or administrative regulatory standards is merely relevant evidence that may be considered by the trier of fact.4 RCW 7.72-.050(1). Fundamentally, it is for the trier of fact to determine if the product was unsafe to an extent beyond that which would be expected by an ordinary consumer. RCW 7.72.030(3). In making that determination it may consider code compliance as well as the evidence of the plaintiffs’ experts. Although the Court of Appeals discounted the opinions of plaintiffs’ experts as speculative and conjectural, when their submissions are viewed in the light most favorable to the plaintiffs they establish that [329]*329feasible alternative designs were available which would have prevented the accident here without violating applicable codes. Indeed, this court has considered affidavits such as these in concluding that a material factual issue was present in product liability cases. See Lamon v. McDonnell Douglas Corp., 91 Wn.2d 345, 588 P.2d 1346 (1979).5
The dissent suggests that the majority erroneously relies upon Lamon because:
In Lamon, the expert opinion was relevant because it addressed what created the dangerous condition in that case .... Here, expert opinion regarding alternative safer designs is irrelevant because it addresses the wrong issue. What created the dangerous condition here was not Alpine’s decisions regarding the design of its window, which met all code requirements, but the developer’s decision to use such window, which met code requirements but had no childproof features.
See Concurring/Dissenting op. at 336 n.ll. The dissent goes on to indicate that the opinions of the plaintiffs’ experts regarding the design of the window are irrelevant because the window design met all code requirements and, thus, could not have created the dangerous condition that resulted in the injury to Daniel Soproni. We disagree. As previously discussed, compliance with code requirements does not mandate a finding that a product is reasonably safe as designed. As a result, a factual question exists as to whether the design of the window created an unreasonably dangerous condition. The opinions of the plaintiffs experts are relevant on this question. See ER 401. Accordingly, our reference to Lamon is appropriate.
[330]*330We are also concerned that the Court of Appeals did not engage in any overt balancing of the risk of Alpine’s product against its utility. It simply concluded, in essence, that á product is not unsafe merely because safer designs exist for a given application, and it did so without discussing design utility beyond reference to fire and building codes. Although codes and standards implicitly reflect a consideration of the balance between the likelihood and seriousness of harm on the one hand, and the impact that an alternative design would have on a product’s usefulness on the other, the fact that there is compliance with codes does not, as we have stated, trump the declarations of expert witnesses.6 These declarations, at the very least, create an issue of fact on the point.
Finally, we note that, in upholding the trial court, the Court of Appeals emphasized that Daniel’s injuries did not result from an intended or foreseeable use of the window. It also cited to a case in which a plaintiff alleged negligent road maintenance, Ruff v. King County, 125 Wn.2d 697, 707, 887 P.2d 886 (1995), for the proposition that there is no duty to make a safe product safer. This discussion is not appropriate to a product liability claim because strict liability rather than negligence is the standard for design defect claims.7 Falk, 113 Wn.2d at 654.
[331]*331C. Conclusion
We conclude that although the Court of Appeals correctly affirmed the trial court’s summary judgment dismissing the plaintiffs’ claim for failure to warn, it erred in affirming the summary judgment insofar as it dismissed plaintiffs’ design defect claim. We, therefore, reverse the decision, in part, and remand for trial.
Smith, Johnson, Madsen, and Sanders, JJ., concur.